diff --git a/client/components/CandidateReview/CandidateTestPlanRun/index.jsx b/client/components/CandidateReview/CandidateTestPlanRun/index.jsx
index 33024afe0..ad98d49ad 100644
--- a/client/components/CandidateReview/CandidateTestPlanRun/index.jsx
+++ b/client/components/CandidateReview/CandidateTestPlanRun/index.jsx
@@ -29,9 +29,12 @@ import createIssueLink, {
 import RunHistory from '../../common/RunHistory';
 import { useUrlTestIndex } from '../../../hooks/useUrlTestIndex';
 import { evaluateAuth } from '../../../utils/evaluateAuth';
+import summarizeAssertions from '../../../utils/summarizeAssertions.js';
 import NotApprovedModal from '../CandidateModals/NotApprovedModal';
 import FailingAssertionsSummaryTable from '../../FailingAssertionsSummary/Table';
 import FailingAssertionsSummaryHeading from '../../FailingAssertionsSummary/Heading';
+import NegativeSideEffectsSummaryTable from '../../NegativeSideEffectsSummary/Table';
+import NegativeSideEffectsSummaryHeading from '../../NegativeSideEffectsSummary/Heading';
 import styles from './CandidateTestPlanRun.module.css';
 import feedbackStyles from '../FeedbackListItem/FeedbackListItem.module.css';
 import testRunStyles from '../../TestRun/TestRun.module.css';
@@ -49,6 +52,8 @@ const vendorReviewStatusMap = {
   IN_PROGRESS: 'In Progress',
   APPROVED: 'Approved'
 };
+const FAILING_ASSERTIONS_INDEX = -1;
+const NEGATIVE_SIDE_EFFECTS = -2;
 
 const CandidateTestPlanRun = () => {
   const { atId, testPlanVersionId } = useParams();
@@ -62,7 +67,7 @@ const CandidateTestPlanRun = () => {
   const [viewedTests, setViewedTests] = useState([]);
   const [testsLength, setTestsLength] = useState(0);
   const [currentTestIndex, setCurrentTestIndex] = useUrlTestIndex({
-    minTestIndex: -1,
+    minTestIndex: -2,
     maxTestIndex: testsLength
   });
   const [showTestNavigator, setShowTestNavigator] = useState(true);
@@ -126,7 +131,9 @@ const CandidateTestPlanRun = () => {
     skip: !testPlanReport
   });
 
-  const isSummaryView = currentTestIndex === -1;
+  const isSummaryView =
+    currentTestIndex === FAILING_ASSERTIONS_INDEX ||
+    currentTestIndex === NEGATIVE_SIDE_EFFECTS;
 
   const isLaptopOrLarger = useMediaQuery({
     query: '(min-width: 792px)'
@@ -139,7 +146,7 @@ const CandidateTestPlanRun = () => {
   }, [data?.testPlanReports]);
   const handleTestClick = async index => {
     setCurrentTestIndex(index);
-    if (index === -1) {
+    if (index < 0) {
       // Summary view
       setIsFirstTest(false);
       setIsLastTest(false);
@@ -403,44 +410,56 @@ const CandidateTestPlanRun = () => {
   const fileBugUrl = AtBugTrackerMap[at];
 
   const getHeading = () => {
+    if (currentTestIndex === FAILING_ASSERTIONS_INDEX) {
+      return (
+        <>
+          <span className={testRunStyles.taskLabel}>
+            Candidate Test Plan Review
+          </span>
+          <FailingAssertionsSummaryHeading
+            metrics={testPlanReport.metrics}
+            as="h1"
+          />
+        </>
+      );
+    }
+
+    if (currentTestIndex === NEGATIVE_SIDE_EFFECTS) {
+      return (
+        <>
+          <span className={testRunStyles.taskLabel}>
+            Candidate Test Plan Review
+          </span>
+          <NegativeSideEffectsSummaryHeading
+            metrics={testPlanReport.metrics}
+            as="h1"
+          />
+        </>
+      );
+    }
+
     return (
-      <div className="p-0">
-        {isSummaryView ? (
-          <>
-            <span className={testRunStyles.taskLabel}>
-              Candidate Test Plan Review
-            </span>
-            <FailingAssertionsSummaryHeading
-              metrics={testPlanReport.metrics}
-              as="h1"
-            />
-          </>
-        ) : (
-          <>
-            <div className="sr-only" aria-live="polite" aria-atomic="true">
-              Viewing Test {currentTest.title}, Test {currentTest.seq} of{' '}
-              {tests.length}
-              {currentTest.seq === tests.length
-                ? 'You are on the last test.'
-                : ''}
-            </div>
-            <span className={testRunStyles.taskLabel}>
-              Reviewing Test {currentTest.seq} of {tests.length}:
-            </span>
-            <h1>
-              {`${currentTest.seq}. ${currentTest.title}`}{' '}
-              <span className={styles.using}>using</span> {`${at}`}{' '}
-              {`${testPlanReport?.latestAtVersionReleasedAt?.name ?? ''}`}
-              {viewedTests.includes(currentTest.id) && !firstTimeViewing && ' '}
-              {viewedTests.includes(currentTest.id) && !firstTimeViewing && (
-                <Badge className={styles.viewedBadge} pill variant="secondary">
-                  Previously Viewed
-                </Badge>
-              )}
-            </h1>
-          </>
-        )}
-      </div>
+      <>
+        <div className="sr-only" aria-live="polite" aria-atomic="true">
+          Viewing Test {currentTest.title}, Test {currentTest.seq} of{' '}
+          {tests.length}
+          {currentTest.seq === tests.length ? 'You are on the last test.' : ''}
+        </div>
+        <span className={testRunStyles.taskLabel}>
+          Reviewing Test {currentTest.seq} of {tests.length}:
+        </span>
+        <h1>
+          {`${currentTest.seq}. ${currentTest.title}`}{' '}
+          <span className={styles.using}>using</span> {`${at}`}{' '}
+          {`${testPlanReport?.latestAtVersionReleasedAt?.name ?? ''}`}
+          {viewedTests.includes(currentTest.id) && !firstTimeViewing && ' '}
+          {viewedTests.includes(currentTest.id) && !firstTimeViewing && (
+            <Badge className={styles.viewedBadge} pill variant="secondary">
+              Previously Viewed
+            </Badge>
+          )}
+        </h1>
+      </>
     );
   };
 
@@ -560,93 +579,100 @@ const CandidateTestPlanRun = () => {
   };
 
   const getContent = () => {
+    if (currentTestIndex === FAILING_ASSERTIONS_INDEX) {
+      return (
+        <div
+          className={
+            failingAssertionsSummaryStyles.failingAssertionsSummaryTableContainer
+          }
+        >
+          <FailingAssertionsSummaryTable
+            testPlanReport={testPlanReports[0]}
+            atName={at}
+            getLinkUrl={assertion => `#${assertion.testIndex + 1}`}
+          />
+        </div>
+      );
+    }
+    if (currentTestIndex === NEGATIVE_SIDE_EFFECTS) {
+      return (
+        <div
+          className={
+            failingAssertionsSummaryStyles.failingAssertionsSummaryTableContainer
+          }
+        >
+          <NegativeSideEffectsSummaryTable
+            testPlanReport={testPlanReports[0]}
+            atName={at}
+            getLinkUrl={assertion => `#${assertion.testIndex + 1}`}
+          />
+        </div>
+      );
+    }
     return (
-      <div className="p-0">
-        {isSummaryView ? (
-          <div
-            className={
-              failingAssertionsSummaryStyles.failingAssertionsSummaryTableContainer
-            }
-          >
-            <FailingAssertionsSummaryTable
-              testPlanReport={testPlanReports[0]}
-              atName={at}
-              getLinkUrl={assertion => `#${assertion.testIndex + 1}`}
+      <>
+        <h1 className="border-0" data-testid="current-test-title">
+          {currentTest.title}
+        </h1>
+        <DisclosureComponent
+          componentId="candidateReviewRun"
+          headingLevel="1"
+          title={[
+            'Test Instructions',
+            ...testPlanReports.map(
+              testPlanReport =>
+                `Test Results for ${testPlanReport.browser.name}`
+            ),
+            'Run History'
+          ]}
+          onClick={[
+            () => setShowInstructions(!showInstructions),
+            ...showBrowserClicks,
+            () => setShowRunHistory(!showRunHistory)
+          ]}
+          expanded={[showInstructions, ...showBrowserBools, showRunHistory]}
+          disclosureContainerView={[
+            <InstructionsRenderer
+              customClassNames={
+                styles.candidateReviewCustomInstructionsRenderer
+              }
+              key={`instructions-${currentTest.id}`}
+              at={testPlanReport.at}
+              test={currentTest}
+              testPageUrl={testPlanReport.testPlanVersion.testPageUrl}
+              testFormatVersion={testPlanVersion.metadata.testFormatVersion}
+            />,
+            ...testPlanReports.map(testPlanReport => {
+              const testResult =
+                testPlanReport.finalizedTestResults[currentTestIndex];
+
+              const assertionsSummary = summarizeAssertions(
+                getMetrics({
+                  testResult
+                })
+              );
+
+              return (
+                <>
+                  <h2 className={styles.testResultsHeader}>
+                    Test Results&nbsp;({assertionsSummary})
+                  </h2>
+                  <TestPlanResultsTable
+                    key={`${testPlanReport.id} + ${testResult.id}`}
+                    test={{ ...currentTest, at: { name: at } }}
+                    testResult={testResult}
+                  />
+                </>
+              );
+            }),
+            <RunHistory
+              key="run-history"
+              testPlanReports={testPlanReports}
+              testId={currentTest.id}
             />
-          </div>
-        ) : (
-          <>
-            <h1 className="border-0" data-testid="current-test-title">
-              {currentTest.title}
-            </h1>
-            <DisclosureComponent
-              componentId="candidateReviewRun"
-              headingLevel="1"
-              title={[
-                'Test Instructions',
-                ...testPlanReports.map(
-                  testPlanReport =>
-                    `Test Results for ${testPlanReport.browser.name}`
-                ),
-                'Run History'
-              ]}
-              onClick={[
-                () => setShowInstructions(!showInstructions),
-                ...showBrowserClicks,
-                () => setShowRunHistory(!showRunHistory)
-              ]}
-              expanded={[showInstructions, ...showBrowserBools, showRunHistory]}
-              disclosureContainerView={[
-                <InstructionsRenderer
-                  customClassNames={
-                    styles.candidateReviewCustomInstructionsRenderer
-                  }
-                  key={`instructions-${currentTest.id}`}
-                  at={testPlanReport.at}
-                  test={currentTest}
-                  testPageUrl={testPlanReport.testPlanVersion.testPageUrl}
-                  testFormatVersion={testPlanVersion.metadata.testFormatVersion}
-                />,
-                ...testPlanReports.map(testPlanReport => {
-                  const testResult =
-                    testPlanReport.finalizedTestResults[currentTestIndex];
-
-                  const {
-                    assertionsPassedCount,
-                    mustAssertionsFailedCount,
-                    shouldAssertionsFailedCount,
-                    mayAssertionsFailedCount
-                  } = getMetrics({ testResult });
-
-                  const mustShouldAssertionsFailedCount =
-                    mustAssertionsFailedCount + shouldAssertionsFailedCount;
-
-                  return (
-                    <>
-                      <h2 className={styles.testResultsHeader}>
-                        Test Results&nbsp;(
-                        {assertionsPassedCount} passed,&nbsp;
-                        {mustShouldAssertionsFailedCount} failed,&nbsp;
-                        {mayAssertionsFailedCount} unsupported)
-                      </h2>
-                      <TestPlanResultsTable
-                        key={`${testPlanReport.id} + ${testResult.id}`}
-                        test={{ ...currentTest, at: { name: at } }}
-                        testResult={testResult}
-                      />
-                    </>
-                  );
-                }),
-                <RunHistory
-                  key="run-history"
-                  testPlanReports={testPlanReports}
-                  testId={currentTest.id}
-                />
-              ]}
-            ></DisclosureComponent>
-          </>
-        )}
-      </div>
+          ]}
+        ></DisclosureComponent>
+      </>
     );
   };
 
@@ -668,14 +694,14 @@ const CandidateTestPlanRun = () => {
         />
         <Col id="main" as="main" tabIndex="-1">
           <Row>
-            {getHeading()}
+            <div className="p-0">{getHeading()}</div>
             {getTestInfo()}
             <Col className="p-0">
               <Row xs={1} s={1} md={2}>
                 <Col className="p-0" md={isLaptopOrLarger ? 9 : 12}>
                   <Row>{getFeedback()}</Row>
                   <Row className={styles.candidateResultsContainer}>
-                    {getContent()}
+                    <div className="p-0">{getContent()}</div>
                   </Row>
                   <Row>
                     <ul
diff --git a/client/components/NegativeSideEffectsSummary/Heading.jsx b/client/components/NegativeSideEffectsSummary/Heading.jsx
new file mode 100644
index 000000000..499e26b46
--- /dev/null
+++ b/client/components/NegativeSideEffectsSummary/Heading.jsx
@@ -0,0 +1,20 @@
+import React from 'react';
+import { TestPlanReportMetricsPropType } from '../common/proptypes';
+import PropTypes from 'prop-types';
+
+const NegativeSideEffectsSummaryHeading = ({ metrics, as: Element = 'h2' }) => {
+  return (
+    <Element id="negative-side-effects-heading">
+      Summary of Negative Side Effects (
+      {metrics.severeImpactFailedAssertionCount} severe,{' '}
+      {metrics.moderateImpactFailedAssertionCount} moderate)
+    </Element>
+  );
+};
+
+NegativeSideEffectsSummaryHeading.propTypes = {
+  metrics: TestPlanReportMetricsPropType.isRequired,
+  as: PropTypes.elementType
+};
+
+export default NegativeSideEffectsSummaryHeading;
diff --git a/client/components/NegativeSideEffectsSummary/Table.jsx b/client/components/NegativeSideEffectsSummary/Table.jsx
new file mode 100644
index 000000000..87bee0129
--- /dev/null
+++ b/client/components/NegativeSideEffectsSummary/Table.jsx
@@ -0,0 +1,60 @@
+import React from 'react';
+import PropTypes from 'prop-types';
+import { Table } from 'react-bootstrap';
+import { Link } from 'react-router-dom';
+import { useNegativeSideEffects } from '../../hooks/useNegativeSideEffects';
+import { TestPlanReportPropType } from '../common/proptypes';
+
+const NegativeSideEffectsSummaryTable = ({
+  testPlanReport,
+  getLinkUrl = assertion => `#result-${assertion.testId}`,
+  LinkComponent = Link
+}) => {
+  const negativeSideEffects = useNegativeSideEffects(testPlanReport);
+  const { metrics } = testPlanReport;
+
+  if (metrics.unexpectedBehaviorCount.length === 0) return null;
+
+  return (
+    <>
+      <Table
+        bordered
+        responsive
+        aria-labelledby="negative-side-effects-heading"
+      >
+        <thead>
+          <tr>
+            <th>Test Name</th>
+            <th>Command</th>
+            <th>Side Effect</th>
+            <th>Details</th>
+            <th>Impact</th>
+          </tr>
+        </thead>
+        <tbody>
+          {negativeSideEffects.map((assertion, index) => (
+            <tr key={`negative-side-effects-${index}`}>
+              <td>
+                <LinkComponent to={getLinkUrl(assertion)}>
+                  {assertion.testTitle}
+                </LinkComponent>
+              </td>
+              <td>{assertion.scenarioCommands}</td>
+              <td>{assertion.text}</td>
+              <td>{assertion.details}</td>
+              <td>{assertion.impact}</td>
+            </tr>
+          ))}
+        </tbody>
+      </Table>
+    </>
+  );
+};
+
+NegativeSideEffectsSummaryTable.propTypes = {
+  testPlanReport: TestPlanReportPropType.isRequired,
+  getLinkUrl: PropTypes.func,
+  LinkComponent: PropTypes.elementType
+};
+
+export default NegativeSideEffectsSummaryTable;
diff --git a/client/components/Reports/SummarizeTestPlanReport.jsx b/client/components/Reports/SummarizeTestPlanReport.jsx
index 604d63616..c40fa8f84 100644
--- a/client/components/Reports/SummarizeTestPlanReport.jsx
+++ b/client/components/Reports/SummarizeTestPlanReport.jsx
@@ -17,6 +17,7 @@ import TestPlanResultsTable from '../common/TestPlanResultsTable';
 import DisclosureComponent from '../common/DisclosureComponent';
 import { Link, Navigate, useLocation, useParams } from 'react-router-dom';
 import createIssueLink from '../../utils/createIssueLink';
+import summarizeAssertions from '../../utils/summarizeAssertions.js';
 import RunHistory from '../common/RunHistory';
 import {
   TestPlanReportPropType,
@@ -24,6 +25,8 @@ import {
 } from '../common/proptypes';
 import FailingAssertionsSummaryTable from '../FailingAssertionsSummary/Table';
 import FailingAssertionsSummaryHeading from '../FailingAssertionsSummary/Heading';
+import NegativeSideEffectsSummaryTable from '../NegativeSideEffectsSummary/Table';
+import NegativeSideEffectsSummaryHeading from '../NegativeSideEffectsSummary/Heading';
 import styles from './SummarizeTestPlanReport.module.css';
 import commonStyles from '../common/styles.module.css';
 
@@ -187,6 +190,25 @@ const SummarizeTestPlanReport = ({ testPlanVersion, testPlanReports }) => {
     );
   };
 
+  const renderNegativeSideEffectsSummary = () => {
+    if (testPlanReport.metrics.unexpectedBehaviorCount === 0) {
+      return null;
+    }
+
+    return (
+      <>
+        <NegativeSideEffectsSummaryHeading metrics={testPlanReport.metrics} />
+        <NegativeSideEffectsSummaryTable
+          testPlanReport={testPlanReport}
+          atName={testPlanReport.at.name}
+          getLinkUrl={assertion =>
+            `/report/${testPlanVersion.id}/targets/${testPlanReport.id}#result-${assertion.testResultId}`
+          }
+        />
+      </>
+    );
+  };
+
   return (
     <Container id="main" as="main" tabIndex="-1">
       <Helmet>
@@ -262,6 +284,7 @@ const SummarizeTestPlanReport = ({ testPlanVersion, testPlanReports }) => {
       {renderVersionsSummaryTable()}
       {renderResultsForTargetTable()}
       {renderFailingAssertionsSummary()}
+      {renderNegativeSideEffectsSummary()}
       {testPlanReport.finalizedTestResults.map((testResult, index) => {
         const test = testResult.test;
 
@@ -288,26 +311,17 @@ const SummarizeTestPlanReport = ({ testPlanVersion, testPlanReports }) => {
           'https://aria-at.netlify.app'
         );
 
-        const {
-          assertionsPassedCount,
-          mustAssertionsFailedCount,
-          shouldAssertionsFailedCount,
-          mayAssertionsFailedCount
-        } = getMetrics({
-          testResult
-        });
-
-        const mustShouldAssertionsFailedCount =
-          mustAssertionsFailedCount + shouldAssertionsFailedCount;
+        const assertionsSummary = summarizeAssertions(
+          getMetrics({
+            testResult
+          })
+        );
 
         return (
           <Fragment key={testResult.id}>
             <div className={styles.testResultHeading}>
               <h2 id={`result-${testResult.id}`} tabIndex="-1">
-                Test {index + 1}: {test.title}&nbsp;(
-                {assertionsPassedCount} passed,&nbsp;
-                {mustShouldAssertionsFailedCount} failed,&nbsp;
-                {mayAssertionsFailedCount} unsupported)
+                Test {index + 1}: {test.title}&nbsp;({assertionsSummary})
                 <DisclaimerInfo phase={testPlanVersion.phase} />
               </h2>
               <div className={styles.testResultButtons}>
diff --git a/client/components/TestRenderer/AssertionsFieldset/index.jsx b/client/components/TestRenderer/AssertionsFieldset/index.jsx
index 1c61bc11b..7cfab0837 100644
--- a/client/components/TestRenderer/AssertionsFieldset/index.jsx
+++ b/client/components/TestRenderer/AssertionsFieldset/index.jsx
@@ -7,7 +7,8 @@ const AssertionsFieldset = ({
   assertions,
   commandIndex,
   assertionsHeader,
-  readOnly = false
+  readOnly = false,
+  disabled
 }) => {
   // Handle case where build process didn't include assertionResponseQuestion
   const normalizedHeader = useMemo(() => {
@@ -28,6 +29,7 @@ const AssertionsFieldset = ({
           <fieldset
             className={styles.testRendererFieldset}
             key={`AssertionKey_${commandIndex}_${assertionIndex}`}
+            disabled={disabled}
           >
             <legend>{description[0]}</legend>
             <label className={styles.assertionsLabel}>
@@ -63,7 +65,8 @@ AssertionsFieldset.propTypes = {
   assertions: PropTypes.array.isRequired,
   commandIndex: PropTypes.number.isRequired,
   assertionsHeader: PropTypes.object.isRequired,
-  readOnly: PropTypes.bool
+  readOnly: PropTypes.bool,
+  disabled: PropTypes.bool.isRequired
 };
 
 export default AssertionsFieldset;
diff --git a/client/components/TestRenderer/CommandResults/index.jsx b/client/components/TestRenderer/CommandResults/index.jsx
index 1c15711aa..d149c088d 100644
--- a/client/components/TestRenderer/CommandResults/index.jsx
+++ b/client/components/TestRenderer/CommandResults/index.jsx
@@ -1,14 +1,17 @@
 import React from 'react';
 import createIssueLink from '@client/utils/createIssueLink';
-import { AtOutputPropType } from '../../common/proptypes';
+import { AtOutputPropType, UntestablePropType } from '../../common/proptypes';
 import PropTypes from 'prop-types';
+import clsx from 'clsx';
 import AssertionsFieldset from '../AssertionsFieldset';
 import OutputTextArea from '../OutputTextArea';
 import UnexpectedBehaviorsFieldset from '../UnexpectedBehaviorsFieldset';
+import styles from '../TestRenderer.module.css';
 
 const CommandResults = ({
   header,
   atOutput,
+  untestable,
   assertions,
   unexpectedBehaviors,
   assertionsHeader,
@@ -33,17 +36,43 @@ const CommandResults = ({
         isSubmitted={isSubmitted}
         readOnly={isReviewingBot || isReadOnly}
       />
+
+      <label className={styles.untestableLabel}>
+        <input
+          type="checkbox"
+          onChange={e => untestable.change(e.target.checked)}
+          autoFocus={isSubmitted && untestable.focus}
+          checked={untestable.value}
+        />
+        {untestable.description[0]}
+        {isSubmitted && (
+          <span
+            className={clsx(
+              styles.testRendererFeedback,
+              styles.space,
+              'required',
+              untestable.description[1].highlightRequired &&
+                'highlight-required'
+            )}
+          >
+            {untestable.description[1].description}
+          </span>
+        )}
+      </label>
+
       <AssertionsFieldset
         assertions={assertions}
         commandIndex={commandIndex}
         assertionsHeader={assertionsHeader}
         readOnly={isReadOnly}
+        disabled={untestable.value}
       />
       <UnexpectedBehaviorsFieldset
         commandIndex={commandIndex}
         unexpectedBehaviors={unexpectedBehaviors}
         isSubmitted={isSubmitted}
         readOnly={isReadOnly}
+        forceYes={untestable.value}
       />
       <a href={issueLink} target="_blank" rel="noreferrer">
         Raise an issue for {commandString}
@@ -55,6 +84,7 @@ const CommandResults = ({
 CommandResults.propTypes = {
   header: PropTypes.string.isRequired,
   atOutput: AtOutputPropType.isRequired,
+  untestable: UntestablePropType.isRequired,
   assertions: PropTypes.array.isRequired,
   unexpectedBehaviors: PropTypes.object.isRequired,
   assertionsHeader: PropTypes.object.isRequired,
diff --git a/client/components/TestRenderer/TestRenderer.module.css b/client/components/TestRenderer/TestRenderer.module.css
index 14d5d8091..f05309fbb 100644
--- a/client/components/TestRenderer/TestRenderer.module.css
+++ b/client/components/TestRenderer/TestRenderer.module.css
@@ -165,6 +165,14 @@ label {
     }
   }
 
+  &.untestable-label {
+    margin-bottom: var(--8px);
+
+    input {
+      margin-right: var(--4px);
+    }
+  }
+
   &.assertions-label {
     margin-bottom: var(--8px);
     margin-right: var(--8px);
diff --git a/client/components/TestRenderer/UnexpectedBehaviorsFieldset/index.jsx b/client/components/TestRenderer/UnexpectedBehaviorsFieldset/index.jsx
index 156b2f734..518d56e3d 100644
--- a/client/components/TestRenderer/UnexpectedBehaviorsFieldset/index.jsx
+++ b/client/components/TestRenderer/UnexpectedBehaviorsFieldset/index.jsx
@@ -7,10 +7,10 @@ const UnexpectedBehaviorsFieldset = ({
   commandIndex,
   unexpectedBehaviors,
   isSubmitted,
-  readOnly = false
+  readOnly = false,
+  forceYes
 }) => {
   const impactOptions = ['Moderate', 'Severe'];
-
   const handleUnexpectedBehaviorsExistRadioClick = e => {
     if (readOnly) e.preventDefault();
     else {
@@ -45,8 +45,9 @@ const UnexpectedBehaviorsFieldset = ({
           id={`problem-${commandIndex}-true`}
           name={`problem-${commandIndex}`}
           autoFocus={isSubmitted && unexpectedBehaviors.passChoice.focus}
-          defaultChecked={unexpectedBehaviors.passChoice.checked}
-          onClick={handleUnexpectedBehaviorsExistRadioClick}
+          checked={unexpectedBehaviors.passChoice.checked}
+          onChange={handleUnexpectedBehaviorsExistRadioClick}
+          disabled={forceYes}
         />
         <label
           id={`problem-${commandIndex}-true-label`}
@@ -62,8 +63,8 @@ const UnexpectedBehaviorsFieldset = ({
           id={`problem-${commandIndex}-false`}
           name={`problem-${commandIndex}`}
           autoFocus={isSubmitted && unexpectedBehaviors.failChoice.focus}
-          defaultChecked={unexpectedBehaviors.failChoice.checked}
-          onClick={handleUnexpectedBehaviorsExistRadioClick}
+          checked={unexpectedBehaviors.failChoice.checked}
+          onChange={handleUnexpectedBehaviorsExistRadioClick}
         />
         <label
           id={`problem-${commandIndex}-false-label`}
@@ -119,7 +120,7 @@ const UnexpectedBehaviorsFieldset = ({
                       else change(e.target.checked);
                     }}
                   />
-                  {description} behavior occurred
+                  {description}
                 </label>
 
                 {/* Impact select */}
@@ -201,7 +202,8 @@ UnexpectedBehaviorsFieldset.propTypes = {
   commandIndex: PropTypes.number.isRequired,
   unexpectedBehaviors: PropTypes.object.isRequired,
   isSubmitted: PropTypes.bool,
-  readOnly: PropTypes.bool
+  readOnly: PropTypes.bool,
+  forceYes: PropTypes.bool.isRequired
 };
 
 export default UnexpectedBehaviorsFieldset;
diff --git a/client/components/TestRenderer/index.jsx b/client/components/TestRenderer/index.jsx
index 9e954595b..2f8f3b0e9 100644
--- a/client/components/TestRenderer/index.jsx
+++ b/client/components/TestRenderer/index.jsx
@@ -15,6 +15,7 @@ import {
 } from '../../resources/aria-at-test-io-format.mjs';
 import { TestWindow } from '../../resources/aria-at-test-window.mjs';
 import { evaluateAtNameKey } from '../../utils/aria';
+import summarizeAssertions from '../../utils/summarizeAssertions.js';
 import CommandResults from './CommandResults';
 import supportJson from '../../resources/support.json';
 import commandsJson from '../../resources/commands.json';
@@ -131,6 +132,8 @@ const TestRenderer = ({
     for (let i = 0; i < scenarioResults.length; i++) {
       let {
         output,
+        untestable,
+        untestableHighlightRequired,
         assertionResults,
         hasUnexpected,
         unexpectedBehaviors,
@@ -141,6 +144,9 @@ const TestRenderer = ({
       if (output) commands[i].atOutput.value = output;
       commands[i].atOutput.highlightRequired = highlightRequired;
 
+      if (untestable) commands[i].untestable.value = untestable;
+      commands[i].untestable.highlightRequired = !!untestableHighlightRequired;
+
       // Required because assertionResults can now be returned without an id if there is a 0-priority exception
       // applied
       assertionResults = assertionResults.filter(el => !!el.id);
@@ -266,6 +272,9 @@ const TestRenderer = ({
         const atOutputError = item.atOutput.highlightRequired;
         if (atOutputError) return true;
 
+        const untestableError = item.untestable.highlightRequired;
+        if (untestableError) return true;
+
         const unexpectedError = item.unexpected.highlightRequired;
         if (unexpectedError) return true;
 
@@ -289,6 +298,10 @@ const TestRenderer = ({
         const atOutputError = item.atOutput.description[1].highlightRequired;
         if (atOutputError) return true;
 
+        const untestableError =
+          item.untestable.description[1].highlightRequired;
+        if (untestableError) return true;
+
         const unexpectedBehaviorError =
           item.unexpectedBehaviors.description[1].highlightRequired;
         if (unexpectedBehaviorError) return true;
@@ -374,27 +387,16 @@ const TestRenderer = ({
     const { results } = submitResult;
     const { header } = results;
 
-    const {
-      assertionsPassedCount,
-      mustAssertionsFailedCount,
-      shouldAssertionsFailedCount,
-      mayAssertionsFailedCount
-    } = getMetrics({
-      testResult
-    });
-
-    const mustShouldAssertionsFailedCount =
-      mustAssertionsFailedCount + shouldAssertionsFailedCount;
+    const assertionsSummary = summarizeAssertions(
+      getMetrics({
+        testResult
+      })
+    );
 
     return (
       <>
         <h1>{header}</h1>
-        <h2 id="overallstatus">
-          Test Results&nbsp;(
-          {assertionsPassedCount} passed,&nbsp;
-          {mustShouldAssertionsFailedCount} failed,&nbsp;
-          {mayAssertionsFailedCount} unsupported)
-        </h2>
+        <h2 id="overallstatus">Test Results&nbsp;({assertionsSummary})</h2>
         <TestPlanResultsTable
           test={{ id: test.id, title: header, at }}
           testResult={testResult}
@@ -444,6 +446,7 @@ const TestRenderer = ({
                   key={commandIndex}
                   header={value.header}
                   atOutput={value.atOutput}
+                  untestable={value.untestable}
                   assertions={value.assertions}
                   unexpectedBehaviors={value.unexpectedBehaviors}
                   assertionsHeader={value.assertionsHeader}
diff --git a/client/components/TestRun/TestNavigator.jsx b/client/components/TestRun/TestNavigator.jsx
index 4e7e3d67b..c6f8dd6f3 100644
--- a/client/components/TestRun/TestNavigator.jsx
+++ b/client/components/TestRun/TestNavigator.jsx
@@ -42,6 +42,10 @@ const TestNavigator = ({
     );
   }, [isVendor, testPlanReport]);
 
+  const shouldShowNegativeSideEffectsSummary = useMemo(() => {
+    return isVendor && testPlanReport.metrics.unexpectedBehaviorCount > 0;
+  }, [isVendor, testPlanReport]);
+
   return (
     <Col className={styles.testNavigator} md={show ? 3 : 12}>
       <div className={styles.testNavigatorToggleContainer}>
@@ -74,7 +78,7 @@ const TestNavigator = ({
                   e.preventDefault();
                   await handleTestClick(-1);
                 }}
-                href="#summary"
+                href="#summary-assertions"
                 className={styles.testName}
                 aria-current={currentTestIndex === -1}
               >
@@ -86,6 +90,25 @@ const TestNavigator = ({
               />
             </div>
           )}
+          {shouldShowNegativeSideEffectsSummary && (
+            <div className={clsx(styles.testNameWrapper, styles.summary)}>
+              <a
+                onClick={async e => {
+                  e.preventDefault();
+                  await handleTestClick(-2);
+                }}
+                href="#summary-side-effects"
+                className={styles.testName}
+                aria-current={currentTestIndex === -2}
+              >
+                Summary of Negative Side Effects
+              </a>
+              <span
+                className={styles.progressIndicator}
+                title="Summary of Negative Side Effects"
+              />
+            </div>
+          )}
           {tests.map((test, index) => {
             let resultClassName = isReadOnly
               ? styles.missing
diff --git a/client/components/TestRun/index.jsx b/client/components/TestRun/index.jsx
index e2f80dae3..fea290d6d 100644
--- a/client/components/TestRun/index.jsx
+++ b/client/components/TestRun/index.jsx
@@ -418,7 +418,7 @@ const TestRun = () => {
       let unexpectedBehaviors = null;
 
       // collect variables
-      const { atOutput, assertions, unexpected } = commands[i];
+      const { atOutput, untestable, assertions, unexpected } = commands[i];
 
       // process assertion results
       for (let j = 0; j < assertions.length; j++) {
@@ -469,6 +469,12 @@ const TestRun = () => {
       scenarioResult.output = atOutput.value ? atOutput.value : null;
       if (captureHighlightRequired)
         scenarioResult.highlightRequired = atOutput.highlightRequired;
+
+      scenarioResult.untestable = untestable.value ? untestable.value : null;
+      if (captureHighlightRequired && untestable)
+        scenarioResult.untestableHighlightRequired =
+          untestable.highlightRequired;
+
       scenarioResult.assertionResults = [...assertionResults];
       scenarioResult.hasUnexpected = hasUnexpected;
       scenarioResult.unexpectedBehaviors = unexpectedBehaviors
@@ -670,11 +676,13 @@ const TestRun = () => {
         assertionResults,
         id,
         output,
+        untestable,
         hasUnexpected,
         unexpectedBehaviors
       }) => ({
         id,
         output: output,
+        untestable: untestable,
         hasUnexpected,
         unexpectedBehaviors: unexpectedBehaviors?.map(
           ({ id, impact, details }) => ({
diff --git a/client/components/common/TestPlanResultsTable/index.jsx b/client/components/common/TestPlanResultsTable/index.jsx
index 3dba6e41d..7141671e2 100644
--- a/client/components/common/TestPlanResultsTable/index.jsx
+++ b/client/components/common/TestPlanResultsTable/index.jsx
@@ -4,19 +4,33 @@ import { Table } from 'react-bootstrap';
 import nextId from 'react-id-generator';
 import { getMetrics } from 'shared';
 import './TestPlanResultsTable.css';
-import { TestPropType, TestResultPropType } from '../proptypes';
+import {
+  TestPlanReportMetricsPropType,
+  TestPropType,
+  TestResultPropType
+} from '../proptypes';
 
-const getAssertionResultText = (passed, priority) => {
-  if (priority === 'MAY') {
+const getAssertionResultText = (assertionResult, untestable) => {
+  const { passed, priorityString, describesSideEffects } = assertionResult;
+
+  // In untestable scenarios, the result of test-specific assertions should be
+  // reported as "untestable" because their state is indeterminate. The other
+  // assertions (that is, those describing the presence of side effects) should
+  // be reported as "Passed" or "Failed" as normal because the absence/presence
+  // of side effects *can* be conclusively reported.
+  if (untestable && !describesSideEffects) {
+    return 'Untestable';
+  }
+  if (priorityString === 'MAY') {
     return passed ? 'Supported' : 'Unsupported';
   }
   return passed ? 'Passed' : 'Failed';
 };
 
-const renderAssertionRow = (assertionResult, priorityString) => {
+const renderAssertionRow = (assertionResult, untestable) => {
   return (
     <tr key={`${assertionResult.id}__${nextId()}`}>
-      <td>{priorityString}</td>
+      <td>{assertionResult.priorityString}</td>
       <td>
         {assertionResult.assertion.phrase
           ? assertionResult.assertion.phrase.charAt(0).toUpperCase() +
@@ -24,11 +38,43 @@ const renderAssertionRow = (assertionResult, priorityString) => {
           : assertionResult.assertion.text.charAt(0).toUpperCase() +
             assertionResult.assertion.text.slice(1)}
       </td>
-      <td>{getAssertionResultText(assertionResult.passed, priorityString)}</td>
+      <td>{getAssertionResultText(assertionResult, untestable)}</td>
     </tr>
   );
 };
 
+const CommandHeading = ({ level, commandsString, metrics }) => {
+  const Heading = `h${level}`;
+  const {
+    assertionsPassedCount,
+    assertionsUntestableCount,
+    mustAssertionsFailedCount,
+    shouldAssertionsFailedCount,
+    mayAssertionsFailedCount
+  } = metrics;
+
+  const mustShouldAssertionsFailedCount =
+    mustAssertionsFailedCount + shouldAssertionsFailedCount;
+  const ambiguousText = assertionsUntestableCount
+    ? `${assertionsUntestableCount} untestable`
+    : `${mayAssertionsFailedCount} unsupported`;
+
+  return (
+    <Heading>
+      {commandsString}&nbsp;Results:&nbsp;
+      {assertionsPassedCount} passed,&nbsp;
+      {mustShouldAssertionsFailedCount} failed,&nbsp;
+      {ambiguousText}
+    </Heading>
+  );
+};
+
+CommandHeading.propTypes = {
+  level: PropTypes.number.isRequired,
+  commandsString: PropTypes.string.isRequired,
+  metrics: TestPlanReportMetricsPropType.isRequired
+};
+
 const TestPlanResultsTable = ({
   test,
   testResult,
@@ -36,23 +82,17 @@ const TestPlanResultsTable = ({
   optionalHeader = null,
   commandHeadingLevel = 3
 }) => {
-  const CommandHeading = `h${commandHeadingLevel}`;
+  const NegativeSideEffectsHeading = `h${commandHeadingLevel}`;
 
   return (
     <>
       {optionalHeader}
       {testResult.scenarioResults.map((scenarioResult, index) => {
+        const metrics = getMetrics({ scenarioResult });
         const {
-          assertionsPassedCount,
-          mustAssertionsFailedCount,
-          shouldAssertionsFailedCount,
-          mayAssertionsFailedCount,
           severeImpactPassedAssertionCount,
           moderateImpactPassedAssertionCount
-        } = getMetrics({ scenarioResult });
-
-        const mustShouldAssertionsFailedCount =
-          mustAssertionsFailedCount + shouldAssertionsFailedCount;
+        } = metrics;
 
         const hasNoSevereUnexpectedBehavior =
           severeImpactPassedAssertionCount > 0;
@@ -100,8 +140,9 @@ const TestPlanResultsTable = ({
           {
             id: `UnexpectedBehavior_MUST_${nextId()}`,
             assertion: {
-              text: 'Other behaviors that create severe negative impacts are not exhibited'
+              text: 'Severe negative side effects do not occur'
             },
+            describesSideEffects: true,
             passed: hasNoSevereUnexpectedBehavior,
             priorityString: 'MUST'
           },
@@ -113,8 +154,9 @@ const TestPlanResultsTable = ({
           {
             id: `UnexpectedBehavior_SHOULD_${nextId()}`,
             assertion: {
-              text: 'Other behaviors that create moderate negative impacts are not exhibited'
+              text: 'Moderate negative side effects do not occur'
             },
+            describesSideEffects: true,
             passed: hasNoModerateUnexpectedBehavior,
             priorityString: 'SHOULD'
           },
@@ -126,12 +168,11 @@ const TestPlanResultsTable = ({
 
         return (
           <React.Fragment key={scenarioResult.id}>
-            <CommandHeading>
-              {commandsString}&nbsp;Results:&nbsp;
-              {assertionsPassedCount} passed,&nbsp;
-              {mustShouldAssertionsFailedCount} failed,&nbsp;
-              {mayAssertionsFailedCount} unsupported
-            </CommandHeading>
+            <CommandHeading
+              level={commandHeadingLevel}
+              commandsString={commandsString}
+              metrics={metrics}
+            />
             <p className="test-plan-results-response-p">
               {test.at?.name} Response:
             </p>
@@ -154,42 +195,43 @@ const TestPlanResultsTable = ({
               </thead>
               <tbody>
                 {sortedAssertionResults.map(assertionResult =>
-                  renderAssertionRow(
-                    assertionResult,
-                    assertionResult.priorityString
-                  )
+                  renderAssertionRow(assertionResult, scenarioResult.untestable)
                 )}
               </tbody>
             </Table>
-            Other behaviors that create negative impact:{' '}
             {scenarioResult.unexpectedBehaviors.length ? (
-              <Table
-                bordered
-                responsive
-                aria-label={`Undesirable behaviors for test ${test.title}`}
-                className={`test-plan-unexpected-behaviors-table ${tableClassName}`}
-              >
-                <thead>
-                  <tr>
-                    <th>Behavior</th>
-                    <th>Details</th>
-                    <th>Impact</th>
-                  </tr>
-                </thead>
-                <tbody>
-                  {scenarioResult.unexpectedBehaviors.map(
-                    ({ id, text, details, impact }) => (
-                      <tr key={id}>
-                        <td>{text}</td>
-                        <td>{details}</td>
-                        <td>{impact}</td>
-                      </tr>
-                    )
-                  )}
-                </tbody>
-              </Table>
+              <>
+                <NegativeSideEffectsHeading>
+                  Negative side effects of {commandsString}
+                </NegativeSideEffectsHeading>
+                <Table
+                  bordered
+                  responsive
+                  aria-label={`Negative side effects of ${commandsString}`}
+                  className={`test-plan-unexpected-behaviors-table ${tableClassName}`}
+                >
+                  <thead>
+                    <tr>
+                      <th>Side Effect</th>
+                      <th>Details</th>
+                      <th>Impact</th>
+                    </tr>
+                  </thead>
+                  <tbody>
+                    {scenarioResult.unexpectedBehaviors.map(
+                      ({ id, text, details, impact }) => (
+                        <tr key={id}>
+                          <td>{text}</td>
+                          <td>{details}</td>
+                          <td>{impact}</td>
+                        </tr>
+                      )
+                    )}
+                  </tbody>
+                </Table>
+              </>
             ) : (
-              'None'
+              `The command '${commandsString}' did not cause any negative side effects.`
             )}
             {/* Do not show separator below last item */}
             {index !== testResult.scenarioResults.length - 1 ? (
diff --git a/client/components/common/fragments/ScenarioResult.js b/client/components/common/fragments/ScenarioResult.js
index d385d8d0a..c17688304 100644
--- a/client/components/common/fragments/ScenarioResult.js
+++ b/client/components/common/fragments/ScenarioResult.js
@@ -28,6 +28,7 @@ const SCENARIO_RESULT_FIELDS = (type = 'simple') => {
           __typename
           id
           output
+          untestable
           scenario {
             id
             commands {
diff --git a/client/components/common/proptypes/index.js b/client/components/common/proptypes/index.js
index 5fd92c7d0..3ad3581cb 100644
--- a/client/components/common/proptypes/index.js
+++ b/client/components/common/proptypes/index.js
@@ -354,3 +354,18 @@ export const AtOutputPropType = PropTypes.shape({
   change: PropTypes.func.isRequired,
   focus: PropTypes.bool.isRequired
 });
+
+export const UntestablePropType = PropTypes.shape({
+  description: PropTypes.arrayOf(
+    PropTypes.oneOfType([
+      PropTypes.string,
+      PropTypes.shape({
+        highlightRequired: PropTypes.bool.isRequired,
+        description: PropTypes.string.isRequired
+      })
+    ])
+  ).isRequired,
+  change: PropTypes.func.isRequired,
+  value: PropTypes.bool.isRequired,
+  focus: PropTypes.bool.isRequired
+});
diff --git a/client/hooks/useFailingAssertions.js b/client/hooks/useFailingAssertions.js
index 98768d840..bb2b389cc 100644
--- a/client/hooks/useFailingAssertions.js
+++ b/client/hooks/useFailingAssertions.js
@@ -58,9 +58,9 @@ export const useFailingAssertions = testPlanReport => {
               ...commonResult,
               assertionText:
                 unexpectedBehavior.impact.toLowerCase() === 'moderate'
-                  ? 'Other behaviors that create moderate negative impacts are not exhibited'
+                  ? 'Moderate negative side effects do not occur'
                   : unexpectedBehavior.impact.toLowerCase() === 'severe'
-                  ? 'Other behaviors that create severe negative impacts are not exhibited'
+                  ? 'Severe negative side effects do not occur'
                   : 'N/A',
               priority:
                 unexpectedBehavior.impact.toLowerCase() === 'moderate'
diff --git a/client/hooks/useNegativeSideEffects.js b/client/hooks/useNegativeSideEffects.js
new file mode 100644
index 000000000..ccfa77b3d
--- /dev/null
+++ b/client/hooks/useNegativeSideEffects.js
@@ -0,0 +1,46 @@
+import { useMemo } from 'react';
+
+export const useNegativeSideEffects = testPlanReport => {
+  return useMemo(() => {
+    if (!testPlanReport?.finalizedTestResults) {
+      return [];
+    }
+
+    const negativeSideEffects = testPlanReport.finalizedTestResults.flatMap(
+      (testResult, testIndex) => {
+        return testResult.scenarioResults.flatMap(scenarioResult => {
+          const commonResult = {
+            testResultId: testResult.id,
+            testIndex,
+            testTitle: testResult.test.title,
+            scenarioCommands: scenarioResult.scenario.commands
+              .map((cmd, index) => {
+                if (index === scenarioResult.scenario.commands.length - 1) {
+                  return cmd.text;
+                }
+                // Prevent instances of duplicated setting in brackets.
+                // eg. Down Arrow (virtual cursor active) then Down Arrow (virtual cursor active)
+                //
+                // Expectation is Down Arrow then Down Arrow (virtual cursor active), because the setting will always be
+                // the same for the listed key combination.
+                //
+                // Some revision of how that key combination + setting is rendered may be useful
+                return cmd.text.split(' (')[0];
+              })
+              .join(' then '),
+            commandId: `${
+              scenarioResult.scenario.id
+            }_${scenarioResult.scenario.commands.map(cmd => cmd.id).join('_')}`
+          };
+
+          return scenarioResult.unexpectedBehaviors.map(unexpectedBehavior => ({
+            ...commonResult,
+            ...unexpectedBehavior
+          }));
+        });
+      }
+    );
+
+    return negativeSideEffects;
+  }, [testPlanReport]);
+};
diff --git a/client/hooks/useUrlTestIndex.js b/client/hooks/useUrlTestIndex.js
index 4d312ad19..997fe459c 100644
--- a/client/hooks/useUrlTestIndex.js
+++ b/client/hooks/useUrlTestIndex.js
@@ -1,14 +1,28 @@
 import { useLocation, useNavigate } from 'react-router-dom';
 import { useEffect, useState } from 'react';
 
+/**
+ * In the context of this hook, two negative values for test indices carry
+ * special meaning:
+ *
+ * * -1: display the "Summary of Failing Assertions"
+ * * -2: display the "Summary of Negative Side Effects"
+ */
+const FAILING_ASSERTIONS_INDEX = -1;
+const NEGATIVE_SIDE_EFFECTS = -2;
+
 export const useUrlTestIndex = ({ minTestIndex = 0, maxTestIndex }) => {
   const location = useLocation();
   const navigate = useNavigate();
   const [currentTestIndex, setCurrentTestIndex] = useState(minTestIndex);
 
   const getTestIndex = () => {
-    if (location.hash === '#summary') {
-      return -1;
+    if (location.hash === '#summary-assertions') {
+      return FAILING_ASSERTIONS_INDEX;
+    }
+
+    if (location.hash === '#summary-side-effects') {
+      return NEGATIVE_SIDE_EFFECTS;
     }
 
     // Remove the '#' character
@@ -29,8 +43,12 @@ export const useUrlTestIndex = ({ minTestIndex = 0, maxTestIndex }) => {
 
   const updateTestIndex = index => {
     // Special case for summary
-    if (index === -1) {
-      navigate(`${location.pathname}#summary`, { replace: true });
+    if (index === FAILING_ASSERTIONS_INDEX) {
+      navigate(`${location.pathname}#summary-assertions`, { replace: true });
+      return;
+    }
+    if (index === NEGATIVE_SIDE_EFFECTS) {
+      navigate(`${location.pathname}#summary-side-effects`, { replace: true });
       return;
     }
 
diff --git a/client/tests/e2e/CandidateReview.e2e.test.js b/client/tests/e2e/CandidateReview.e2e.test.js
index 06489aef6..3e8e8e00b 100644
--- a/client/tests/e2e/CandidateReview.e2e.test.js
+++ b/client/tests/e2e/CandidateReview.e2e.test.js
@@ -132,7 +132,7 @@ describe('Candidate Review when signed in as vendor', () => {
           '::-p-text(Review status by JAWS Representative: In Progress)'
         );
 
-        await page.click('a[href="#summary"]');
+        await page.click('a[href="#summary-assertions"]');
 
         // Check navigation buttons in summary view
         const previousButton = await page.$('button::-p-text(Previous Test)');
@@ -147,7 +147,7 @@ describe('Candidate Review when signed in as vendor', () => {
         await page.waitForSelector('h1::-p-text(1.)');
         // Check summary link aria-current attribute
         const summaryLinkAriaCurrent = await page.$eval(
-          'a[href="#summary"]',
+          'a[href="#summary-assertions"]',
           el => el.getAttribute('aria-current')
         );
         expect(summaryLinkAriaCurrent).toBe('false');
@@ -159,7 +159,9 @@ describe('Candidate Review when signed in as vendor', () => {
         await previousFromFirstTest.click();
 
         // Should be back on summary
-        await page.waitForSelector('a[href="#summary"][aria-current="true"]');
+        await page.waitForSelector(
+          'a[href="#summary-assertions"][aria-current="true"]'
+        );
 
         expect(consoleErrors).toHaveLength(0);
       }
@@ -184,7 +186,7 @@ describe('Candidate Review when signed in as vendor', () => {
         );
 
         // Check for summary specific content
-        await page.click('a[href="#summary"]');
+        await page.click('a[href="#summary-assertions"]');
         await page.waitForSelector(
           'h1::-p-text(Summary of Failing Assertions)'
         );
diff --git a/client/tests/e2e/TestRun.e2e.test.js b/client/tests/e2e/TestRun.e2e.test.js
index 4a39b13e4..f100d175c 100644
--- a/client/tests/e2e/TestRun.e2e.test.js
+++ b/client/tests/e2e/TestRun.e2e.test.js
@@ -110,6 +110,8 @@ describe('Test Run when not signed in', () => {
 });
 
 describe('Test Run when signed in as tester', () => {
+  const submitResultsButtonSelector =
+    'button[class="btn btn-primary"] ::-p-text(Submit Results)';
   const assignSelfAndNavigateToRun = async (
     page,
     {
@@ -171,8 +173,6 @@ describe('Test Run when signed in as tester', () => {
     // Confirm that submission cannot happen with empty form
     // Specificity with selector because there's a 2nd 'hidden' button coming
     // from the harness which is what is actually called for the submit event
-    const submitResultsButtonSelector =
-      'button[class="btn btn-primary"] ::-p-text(Submit Results)';
     await page.waitForSelector(submitResultsButtonSelector);
     await page.click(submitResultsButtonSelector);
     await page.waitForNetworkIdle();
@@ -313,27 +313,27 @@ describe('Test Run when signed in as tester', () => {
     });
   });
 
-  it('inputs results and navigates between tests to confirm saving', async () => {
-    async function getGeneratedCheckedAssertionCount(page) {
-      return await page.evaluate(() => {
-        const radioGroups = document.querySelectorAll(
-          'input[type="radio"][id^="pass-"]'
-        );
-        let yesCount = 0;
-
-        for (let i = 0; i < radioGroups.length; i += 2) {
-          if (i % 4 === 0) {
-            radioGroups[i].click(); // Click 'Yes' radio
-            yesCount++;
-          } else {
-            radioGroups[i + 1].click(); // Click 'No' radio
-          }
+  async function getGeneratedCheckedAssertionCount(page) {
+    return await page.evaluate(() => {
+      const radioGroups = document.querySelectorAll(
+        'input[type="radio"][id^="pass-"]'
+      );
+      let yesCount = 0;
+
+      for (let i = 0; i < radioGroups.length; i += 2) {
+        if (i % 4 === 0) {
+          radioGroups[i].click(); // Click 'Yes' radio
+          yesCount++;
+        } else {
+          radioGroups[i + 1].click(); // Click 'No' radio
         }
+      }
 
-        return yesCount;
-      });
-    }
+      return yesCount;
+    });
+  }
 
+  it('inputs results and navigates between tests to confirm saving', async () => {
     await getPage({ role: 'tester', url: '/test-queue' }, async page => {
       await assignSelfAndNavigateToRun(page);
 
@@ -454,6 +454,114 @@ describe('Test Run when signed in as tester', () => {
     });
   });
 
+  it('marks assertions as untestable', async () => {
+    const countChecked = page => {
+      return page.evaluate(() => {
+        return {
+          passing: document.querySelectorAll(
+            '[type="radio"][id$=-yes]:not(:disabled):checked'
+          ).length,
+          failing: document.querySelectorAll(
+            '[type="radio"][id$=-no]:not(:disabled):checked'
+          ).length
+        };
+      });
+    };
+    await getPage({ role: 'tester', url: '/test-queue' }, async page => {
+      await assignSelfAndNavigateToRun(page, {
+        testPlanSectionButtonSelector: 'button#disclosure-btn-alert-0',
+        testPlanTableSelector:
+          'table[aria-label="Reports for Alert Example V22.04.14 in draft phase"]'
+      });
+
+      await page.waitForSelector('h1 ::-p-text(Test 1:)');
+      await page.waitForSelector('button ::-p-text(Submit Results)');
+
+      expect(await countChecked(page)).toEqual({
+        passing: 0,
+        failing: 0
+      });
+
+      await getGeneratedCheckedAssertionCount(page);
+
+      expect(await countChecked(page)).toEqual({
+        passing: 3,
+        failing: 3
+      });
+
+      await page.click('label ::-p-text(untestable)');
+
+      expect(await countChecked(page)).toEqual({
+        passing: 2,
+        failing: 2
+      });
+
+      // The initial submission should fail because no SEVERE unexpected
+      // behaviors have been specified.
+      await page.click(submitResultsButtonSelector);
+      await page.waitForNetworkIdle();
+      await page.waitForSelector('h1 ::-p-text(Test 1:)');
+      await page.waitForSelector('button ::-p-text(Submit Results)');
+
+      await page.click('label ::-p-text(excessively verbose)');
+      await page.select('.unexpected-behaviors-label select', 'SEVERE');
+      await page.type(
+        '.unexpected-behaviors-label input[type=text]',
+        'anything'
+      );
+
+      await handlePageSubmit(page, { expectConflicts: false });
+
+      const text = await page.evaluate(() => {
+        // Scrape text and normalize empty space characters.
+        const text = el => el.innerText.replace(/\s/g, ' ');
+        const readTable = el => {
+          return Array.from(el.querySelectorAll('tr')).map(tr =>
+            Array.from(tr.querySelectorAll('td')).map(td => text(td))
+          );
+        };
+        return [text(document.querySelector('main h2'))].concat(
+          Array.from(document.querySelectorAll('main h3, main tbody')).map(el =>
+            el.tagName === 'H3' ? text(el) : readTable(el)
+          )
+        );
+      });
+
+      expect(text).toEqual([
+        'Test Results (7 passed, 3 failed, 0 unsupported, 2 untestable)',
+        'Control+Option+Space Results: 1 passed, 1 failed, 2 untestable',
+        [
+          ['MUST', "Role 'alert' is conveyed", 'Untestable'],
+          ['MUST', "Text 'Hello' is conveyed", 'Untestable'],
+          ['MUST', 'Severe negative side effects do not occur', 'Failed'],
+          ['SHOULD', 'Moderate negative side effects do not occur', 'Passed']
+        ],
+        'Negative side effects of Control+Option+Space',
+        [
+          [
+            'Output is excessively verbose, e.g., includes redundant and/or irrelevant speech',
+            'anything',
+            'SEVERE'
+          ]
+        ],
+        'Space Results: 3 passed, 1 failed, 0 unsupported',
+        [
+          ['MUST', "Text 'Hello' is conveyed", 'Failed'],
+          ['MUST', "Role 'alert' is conveyed", 'Passed'],
+          ['MUST', 'Severe negative side effects do not occur', 'Passed'],
+          ['SHOULD', 'Moderate negative side effects do not occur', 'Passed']
+        ],
+        'Enter Results: 3 passed, 1 failed, 0 unsupported',
+        [
+          ['MUST', "Text 'Hello' is conveyed", 'Failed'],
+          ['MUST', "Role 'alert' is conveyed", 'Passed'],
+          ['MUST', 'Severe negative side effects do not occur', 'Passed'],
+          ['SHOULD', 'Moderate negative side effects do not occur', 'Passed']
+        ]
+      ]);
+    });
+  });
+
   it('inputs results and successfully submits', async () => {
     await getPage(
       { role: 'tester', url: '/test-queue' },
diff --git a/client/tests/e2e/snapshots/saved/_account_settings.html b/client/tests/e2e/snapshots/saved/_account_settings.html
index 9842e5bd0..7d4d6c3bc 100644
--- a/client/tests/e2e/snapshots/saved/_account_settings.html
+++ b/client/tests/e2e/snapshots/saved/_account_settings.html
@@ -98,7 +98,7 @@ <h2>Admin Actions</h2>
             <button type="button" class="btn btn-primary">
               Import Latest Test Plan Versions
             </button>
-            <p>Date of latest test plan version: April 22, 2025 14:04 UTC</p>
+            <p>Date of latest test plan version: June 4, 2025 15:20 UTC</p>
           </section>
         </main>
       </div>
diff --git a/client/tests/e2e/snapshots/saved/_candidate-test-plan_24_1#summary.html b/client/tests/e2e/snapshots/saved/_candidate-test-plan_24_1#summary-assertions.html
similarity index 96%
rename from client/tests/e2e/snapshots/saved/_candidate-test-plan_24_1#summary.html
rename to client/tests/e2e/snapshots/saved/_candidate-test-plan_24_1#summary-assertions.html
index 00ccdb386..caba3bd8b 100644
--- a/client/tests/e2e/snapshots/saved/_candidate-test-plan_24_1#summary.html
+++ b/client/tests/e2e/snapshots/saved/_candidate-test-plan_24_1#summary-assertions.html
@@ -126,12 +126,25 @@ <h2 id="test-navigator-heading">
                   aria-labelledby="test-navigator-heading"
                   class="test-navigator-list">
                   <div class="test-name-wrapper summary">
-                    <a href="#summary" class="test-name" aria-current="true"
+                    <a
+                      href="#summary-assertions"
+                      class="test-name"
+                      aria-current="true"
                       >Summary of Failing Assertions</a
                     ><span
                       class="progress-indicator"
                       title="Summary of Failing Assertions"></span>
                   </div>
+                  <div class="test-name-wrapper summary">
+                    <a
+                      href="#summary-side-effects"
+                      class="test-name"
+                      aria-current="false"
+                      >Summary of Negative Side Effects</a
+                    ><span
+                      class="progress-indicator"
+                      title="Summary of Negative Side Effects"></span>
+                  </div>
                   <li class="test-name-wrapper changes-requested">
                     <a href="#1" class="test-name" aria-current="false"
                       >Open a Modal Dialog in reading mode</a
@@ -351,8 +364,8 @@ <h1 id="failing-assertions-heading">
                                     <td>Space</td>
                                     <td>SHOULD</td>
                                     <td>
-                                      Other behaviors that create moderate
-                                      negative impacts are not exhibited
+                                      Moderate negative side effects do not
+                                      occur
                                     </td>
                                     <td>Other</td>
                                   </tr>
diff --git a/client/tests/e2e/snapshots/saved/_candidate-test-plan_24_1.html b/client/tests/e2e/snapshots/saved/_candidate-test-plan_24_1.html
index 8e697757a..8cef24cd4 100644
--- a/client/tests/e2e/snapshots/saved/_candidate-test-plan_24_1.html
+++ b/client/tests/e2e/snapshots/saved/_candidate-test-plan_24_1.html
@@ -126,12 +126,25 @@ <h2 id="test-navigator-heading">
                   aria-labelledby="test-navigator-heading"
                   class="test-navigator-list">
                   <div class="test-name-wrapper summary">
-                    <a href="#summary" class="test-name" aria-current="false"
+                    <a
+                      href="#summary-assertions"
+                      class="test-name"
+                      aria-current="false"
                       >Summary of Failing Assertions</a
                     ><span
                       class="progress-indicator"
                       title="Summary of Failing Assertions"></span>
                   </div>
+                  <div class="test-name-wrapper summary">
+                    <a
+                      href="#summary-side-effects"
+                      class="test-name"
+                      aria-current="false"
+                      >Summary of Negative Side Effects</a
+                    ><span
+                      class="progress-indicator"
+                      title="Summary of Negative Side Effects"></span>
+                  </div>
                   <li class="test-name-wrapper changes-requested">
                     <a href="#1" class="test-name" aria-current="true"
                       >Open a Modal Dialog in reading mode</a
@@ -514,8 +527,8 @@ <h1 class="disclosure-heading">
                               id="disclosure-btn-controls-candidateReviewRun-Test Results for Chrome"
                               aria-labelledby="disclosure-btn-candidateReviewRun-Test Results for Chrome">
                               <h2 class="test-results-header">
-                                Test Results&nbsp;(12 passed,&nbsp;0
-                                failed,&nbsp;0 unsupported)
+                                Test Results&nbsp;(12 passed, 0 failed, 0
+                                unsupported)
                               </h2>
                               <h3>
                                 Space&nbsp;Results:&nbsp;6 passed,&nbsp;0
@@ -572,23 +585,24 @@ <h3>
                                     <tr>
                                       <td>MUST</td>
                                       <td>
-                                        Other behaviors that create severe
-                                        negative impacts are not exhibited
+                                        Severe negative side effects do not
+                                        occur
                                       </td>
                                       <td>Passed</td>
                                     </tr>
                                     <tr>
                                       <td>SHOULD</td>
                                       <td>
-                                        Other behaviors that create moderate
-                                        negative impacts are not exhibited
+                                        Moderate negative side effects do not
+                                        occur
                                       </td>
                                       <td>Passed</td>
                                     </tr>
                                   </tbody>
                                 </table>
                               </div>
-                              Other behaviors that create negative impact: None
+                              The command 'Space' did not cause any negative
+                              side effects.
                               <hr aria-hidden="true" />
                               <h3>
                                 Enter&nbsp;Results:&nbsp;6 passed,&nbsp;0
@@ -645,23 +659,24 @@ <h3>
                                     <tr>
                                       <td>MUST</td>
                                       <td>
-                                        Other behaviors that create severe
-                                        negative impacts are not exhibited
+                                        Severe negative side effects do not
+                                        occur
                                       </td>
                                       <td>Passed</td>
                                     </tr>
                                     <tr>
                                       <td>SHOULD</td>
                                       <td>
-                                        Other behaviors that create moderate
-                                        negative impacts are not exhibited
+                                        Moderate negative side effects do not
+                                        occur
                                       </td>
                                       <td>Passed</td>
                                     </tr>
                                   </tbody>
                                 </table>
                               </div>
-                              Other behaviors that create negative impact: None
+                              The command 'Enter' did not cause any negative
+                              side effects.
                             </div>
                             <h1 class="disclosure-heading">
                               <button
diff --git a/client/tests/e2e/snapshots/saved/_data-management.html b/client/tests/e2e/snapshots/saved/_data-management.html
index 38b0213fb..f696b86b3 100644
--- a/client/tests/e2e/snapshots/saved/_data-management.html
+++ b/client/tests/e2e/snapshots/saved/_data-management.html
@@ -218,22 +218,23 @@ <h3 class="disclosure-heading">
                     <label class="disclosure-form-label form-label"
                       >Test Plan</label
                     ><select class="form-select">
-                      <option value="88">
+                      <option value="81">Accordion</option>
+                      <option value="89">
                         Action Menu Button Example Using aria-activedescendant
                       </option>
-                      <option value="87">
+                      <option value="88">
                         Action Menu Button Example Using element.focus()
                       </option>
-                      <option value="81">Alert Example</option>
+                      <option value="82">Alert Example</option>
                       <option value="34">Banner Landmark</option>
                       <option value="66">Breadcrumb Example</option>
                       <option value="67">Checkbox Example (Mixed-State)</option>
                       <option value="36">Checkbox Example (Two State)</option>
-                      <option value="84">Color Viewer Slider</option>
+                      <option value="85">Color Viewer Slider</option>
                       <option value="38">
                         Combobox with Both List and Inline Autocomplete Example
                       </option>
-                      <option value="82">Command Button Example</option>
+                      <option value="83">Command Button Example</option>
                       <option value="41">Complementary Landmark</option>
                       <option value="42">Contentinfo Landmark</option>
                       <option value="55">
@@ -242,7 +243,7 @@ <h3 class="disclosure-heading">
                       <option value="43">
                         Date Picker Spin Button Example
                       </option>
-                      <option value="83">
+                      <option value="84">
                         Disclosure Navigation Menu Example
                       </option>
                       <option value="44">
@@ -255,42 +256,41 @@ <h3 class="disclosure-heading">
                       <option value="78">
                         Link Example 1 (span element with text content)
                       </option>
-                      <option value="86">
+                      <option value="87">
                         Link Example 2 (img element with alt attribute)
                       </option>
-                      <option value="85">
+                      <option value="86">
                         Link Example 3 (CSS :before content property on a span
                         element)
                       </option>
                       <option value="49">Main Landmark</option>
-                      <option value="94">Media Seek Slider</option>
+                      <option value="95">Media Seek Slider</option>
                       <option value="54">Meter</option>
-                      <option value="90">Modal Dialog Example</option>
-                      <option value="89">Navigation Menu Button</option>
-                      <option value="92">
+                      <option value="91">Modal Dialog Example</option>
+                      <option value="90">Navigation Menu Button</option>
+                      <option value="93">
                         Radio Group Example Using Roving tabindex
                       </option>
-                      <option value="91">
+                      <option value="92">
                         Radio Group Example Using aria-activedescendant
                       </option>
-                      <option value="93">Rating Radio Group</option>
+                      <option value="94">Rating Radio Group</option>
                       <option value="59">Rating Slider</option>
-                      <option value="39">Select Only Combobox Example</option>
+                      <option value="7">Select Only Combobox Example</option>
                       <option value="61">Switch Example</option>
                       <option value="62">Tabs with Manual Activation</option>
-                      <option value="95">Toggle Button</option>
-                      <option value="96">Vertical Temperature Slider</option>
+                      <option value="96">Toggle Button</option>
+                      <option value="97">Vertical Temperature Slider</option>
                     </select>
                   </div>
                   <div class="form-group">
                     <label class="disclosure-form-label form-label"
                       >Test Plan Version</label
-                    ><select aria-disabled="false" class="form-select">
-                      <option value="88">
-                        Feb 13, 2025 Menu button test plans: Change priority of
-                        assertion stateCollapsed from 1 to 2 (pull #1196)
-                        (bac64bf)
-                      </option>
+                    ><select
+                      disabled=""
+                      aria-disabled="true"
+                      class="form-select">
+                      <option>Versions in R&amp;D or Deprecated</option>
                     </select>
                   </div>
                   <div></div>
@@ -380,7 +380,7 @@ <h2>Test Plans Status Summary</h2>
                 data-testid="filter-all"
                 aria-pressed="true"
                 class="filter-button btn active btn-secondary">
-                All Plans (36)
+                All Plans (37)
               </button>
             </li>
             <li>
@@ -389,7 +389,7 @@ <h2>Test Plans Status Summary</h2>
                 data-testid="filter-rd"
                 aria-pressed="false"
                 class="filter-button btn btn-secondary">
-                R&amp;D Complete (32)
+                R&amp;D Complete (33)
               </button>
             </li>
             <li>
@@ -423,7 +423,7 @@ <h2>Test Plans Status Summary</h2>
           <div class="table-responsive">
             <table
               aria-label="Test Plans Status Summary Table"
-              aria-rowcount="36"
+              aria-rowcount="37"
               class="data-management table table-bordered table-hover">
               <thead>
                 <tr>
@@ -573,7 +573,7 @@ <h2>Test Plans Status Summary</h2>
                   <td>
                     <div class="phase-cell" role="list">
                       <span class="styled-pill full-width auto-width"
-                        ><a href="/test-review/88"
+                        ><a href="/test-review/89"
                           ><span
                             ><svg
                               aria-hidden="true"
@@ -744,7 +744,7 @@ <h2>Test Plans Status Summary</h2>
                   <td>
                     <div class="phase-cell" role="list" aria-setsize="3">
                       <span class="styled-pill full-width auto-width"
-                        ><a href="/test-review/90"
+                        ><a href="/test-review/91"
                           ><span
                             ><svg
                               aria-hidden="true"
@@ -851,7 +851,7 @@ <h2>Test Plans Status Summary</h2>
                   <td>
                     <div class="phase-cell" role="list" aria-setsize="2">
                       <span class="styled-pill full-width auto-width"
-                        ><a href="/test-review/81"
+                        ><a href="/test-review/82"
                           ><span
                             ><svg
                               aria-hidden="true"
@@ -940,7 +940,7 @@ <h2>Test Plans Status Summary</h2>
                   <td>
                     <div class="phase-cell" role="list" aria-setsize="3">
                       <span class="styled-pill full-width auto-width"
-                        ><a href="/test-review/84"
+                        ><a href="/test-review/85"
                           ><span
                             ><svg
                               aria-hidden="true"
@@ -1005,7 +1005,7 @@ <h2>Test Plans Status Summary</h2>
                   <td>
                     <div class="phase-cell" role="list" aria-setsize="2">
                       <span class="styled-pill full-width auto-width"
-                        ><a href="/test-review/82"
+                        ><a href="/test-review/83"
                           ><span
                             ><svg
                               aria-hidden="true"
@@ -1193,7 +1193,7 @@ <h2>Test Plans Status Summary</h2>
                   <td>
                     <div class="phase-cell" role="list" aria-setsize="2">
                       <span class="styled-pill full-width auto-width"
-                        ><a href="/test-review/95"
+                        ><a href="/test-review/96"
                           ><span
                             ><svg
                               aria-hidden="true"
@@ -1259,6 +1259,58 @@ <h2>Test Plans Status Summary</h2>
                   <td><span class="none centered absolute">None Yet</span></td>
                 </tr>
                 <tr aria-rowindex="8">
+                  <th>
+                    <a href="/data-management/accordion"><b>Accordion</b></a>
+                  </th>
+                  <td>
+                    <div>
+                      <b>JAWS</b><span>, </span><b>NVDA</b><span> and </span
+                      ><b>VoiceOver for macOS</b>
+                    </div>
+                  </td>
+                  <td>
+                    <div class="status-cell">
+                      <span class="pill full-width rd">R&amp;D</span>
+                      <p class="review-text">Complete <b>Jun 4, 2025</b></p>
+                    </div>
+                  </td>
+                  <td>
+                    <div class="phase-cell" role="list" aria-setsize="2">
+                      <span class="styled-pill full-width auto-width"
+                        ><a href="/test-review/81"
+                          ><span
+                            ><svg
+                              aria-hidden="true"
+                              focusable="false"
+                              data-prefix="fas"
+                              data-icon="circle-check"
+                              class="svg-inline--fa fa-circle-check check"
+                              role="img"
+                              xmlns="http://www.w3.org/2000/svg"
+                              viewBox="0 0 512 512"
+                              color="var(--positive-green)">
+                              <path
+                                fill="currentColor"
+                                d="M256 512A256 256 0 1 0 256 0a256 256 0 1 0 0 512zM369 209L241 337c-9.4 9.4-24.6 9.4-33.9 0l-64-64c-9.4-9.4-9.4-24.6 0-33.9s24.6-9.4 33.9 0l47 47L335 175c9.4-9.4 24.6-9.4 33.9 0s9.4 24.6 0 33.9z"></path></svg
+                            ><b>V25.06.04</b></span
+                          ></a
+                        ></span
+                      ><button
+                        type="button"
+                        class="advance-button btn btn-secondary">
+                        Advance to Draft
+                      </button>
+                    </div>
+                  </td>
+                  <td>
+                    <span class="none centered absolute">Not Started</span>
+                  </td>
+                  <td>
+                    <span class="none centered absolute">Not Started</span>
+                  </td>
+                  <td><span class="none centered absolute">None Yet</span></td>
+                </tr>
+                <tr aria-rowindex="9">
                   <th>
                     <a href="/data-management/menu-button-actions"
                       ><b
@@ -1281,7 +1333,7 @@ <h2>Test Plans Status Summary</h2>
                   <td>
                     <div class="phase-cell" role="list" aria-setsize="2">
                       <span class="styled-pill full-width auto-width"
-                        ><a href="/test-review/87"
+                        ><a href="/test-review/88"
                           ><span
                             ><svg
                               aria-hidden="true"
@@ -1314,7 +1366,7 @@ <h2>Test Plans Status Summary</h2>
                   </td>
                   <td><span class="none centered absolute">None Yet</span></td>
                 </tr>
-                <tr aria-rowindex="9">
+                <tr aria-rowindex="10">
                   <th>
                     <a href="/data-management/banner"><b>Banner Landmark</b></a>
                   </th>
@@ -1366,7 +1418,7 @@ <h2>Test Plans Status Summary</h2>
                   </td>
                   <td><span class="none centered absolute">None Yet</span></td>
                 </tr>
-                <tr aria-rowindex="10">
+                <tr aria-rowindex="11">
                   <th>
                     <a href="/data-management/breadcrumb"
                       ><b>Breadcrumb Example</b></a
@@ -1420,7 +1472,7 @@ <h2>Test Plans Status Summary</h2>
                   </td>
                   <td><span class="none centered absolute">None Yet</span></td>
                 </tr>
-                <tr aria-rowindex="11">
+                <tr aria-rowindex="12">
                   <th>
                     <a href="/data-management/checkbox"
                       ><b>Checkbox Example (Two State)</b></a
@@ -1474,7 +1526,7 @@ <h2>Test Plans Status Summary</h2>
                   </td>
                   <td><span class="none centered absolute">None Yet</span></td>
                 </tr>
-                <tr aria-rowindex="12">
+                <tr aria-rowindex="13">
                   <th>
                     <a
                       href="/data-management/combobox-autocomplete-both-updated"
@@ -1532,7 +1584,7 @@ <h2>Test Plans Status Summary</h2>
                   </td>
                   <td><span class="none centered absolute">None Yet</span></td>
                 </tr>
-                <tr aria-rowindex="13">
+                <tr aria-rowindex="14">
                   <th>
                     <a href="/data-management/complementary"
                       ><b>Complementary Landmark</b></a
@@ -1586,7 +1638,7 @@ <h2>Test Plans Status Summary</h2>
                   </td>
                   <td><span class="none centered absolute">None Yet</span></td>
                 </tr>
-                <tr aria-rowindex="14">
+                <tr aria-rowindex="15">
                   <th>
                     <a href="/data-management/contentinfo"
                       ><b>Contentinfo Landmark</b></a
@@ -1640,7 +1692,7 @@ <h2>Test Plans Status Summary</h2>
                   </td>
                   <td><span class="none centered absolute">None Yet</span></td>
                 </tr>
-                <tr aria-rowindex="15">
+                <tr aria-rowindex="16">
                   <th>
                     <a href="/data-management/minimal-data-grid"
                       ><b>Data Grid Example 1: Minimal Data Grid</b></a
@@ -1694,7 +1746,7 @@ <h2>Test Plans Status Summary</h2>
                   </td>
                   <td><span class="none centered absolute">None Yet</span></td>
                 </tr>
-                <tr aria-rowindex="16">
+                <tr aria-rowindex="17">
                   <th>
                     <a href="/data-management/datepicker-spin-button"
                       ><b>Date Picker Spin Button Example</b></a
@@ -1748,7 +1800,7 @@ <h2>Test Plans Status Summary</h2>
                   </td>
                   <td><span class="none centered absolute">None Yet</span></td>
                 </tr>
-                <tr aria-rowindex="17">
+                <tr aria-rowindex="18">
                   <th>
                     <a href="/data-management/disclosure-navigation"
                       ><b>Disclosure Navigation Menu Example</b></a
@@ -1769,7 +1821,7 @@ <h2>Test Plans Status Summary</h2>
                   <td>
                     <div class="phase-cell" role="list" aria-setsize="2">
                       <span class="styled-pill full-width auto-width"
-                        ><a href="/test-review/83"
+                        ><a href="/test-review/84"
                           ><span
                             ><svg
                               aria-hidden="true"
@@ -1802,7 +1854,7 @@ <h2>Test Plans Status Summary</h2>
                   </td>
                   <td><span class="none centered absolute">None Yet</span></td>
                 </tr>
-                <tr aria-rowindex="18">
+                <tr aria-rowindex="19">
                   <th>
                     <a href="/data-management/disclosure-faq"
                       ><b
@@ -1859,7 +1911,7 @@ <h2>Test Plans Status Summary</h2>
                   </td>
                   <td><span class="none centered absolute">None Yet</span></td>
                 </tr>
-                <tr aria-rowindex="19">
+                <tr aria-rowindex="20">
                   <th>
                     <a href="/data-management/menubar-editor"
                       ><b>Editor Menubar Example</b></a
@@ -1913,7 +1965,7 @@ <h2>Test Plans Status Summary</h2>
                   </td>
                   <td><span class="none centered absolute">None Yet</span></td>
                 </tr>
-                <tr aria-rowindex="20">
+                <tr aria-rowindex="21">
                   <th>
                     <a href="/data-management/form"><b>Form Landmark</b></a>
                   </th>
@@ -1965,7 +2017,7 @@ <h2>Test Plans Status Summary</h2>
                   </td>
                   <td><span class="none centered absolute">None Yet</span></td>
                 </tr>
-                <tr aria-rowindex="21">
+                <tr aria-rowindex="22">
                   <th>
                     <a href="/data-management/slider-multithumb"
                       ><b>Horizontal Multi-Thumb Slider</b></a
@@ -2019,7 +2071,7 @@ <h2>Test Plans Status Summary</h2>
                   </td>
                   <td><span class="none centered absolute">None Yet</span></td>
                 </tr>
-                <tr aria-rowindex="22">
+                <tr aria-rowindex="23">
                   <th>
                     <a href="/data-management/link-span-text"
                       ><b>Link Example 1 (span element with text content)</b></a
@@ -2073,7 +2125,7 @@ <h2>Test Plans Status Summary</h2>
                   </td>
                   <td><span class="none centered absolute">None Yet</span></td>
                 </tr>
-                <tr aria-rowindex="23">
+                <tr aria-rowindex="24">
                   <th>
                     <a href="/data-management/link-img-alt"
                       ><b>Link Example 2 (img element with alt attribute)</b></a
@@ -2094,7 +2146,7 @@ <h2>Test Plans Status Summary</h2>
                   <td>
                     <div class="phase-cell" role="list" aria-setsize="2">
                       <span class="styled-pill full-width auto-width"
-                        ><a href="/test-review/86"
+                        ><a href="/test-review/87"
                           ><span
                             ><svg
                               aria-hidden="true"
@@ -2127,7 +2179,7 @@ <h2>Test Plans Status Summary</h2>
                   </td>
                   <td><span class="none centered absolute">None Yet</span></td>
                 </tr>
-                <tr aria-rowindex="24">
+                <tr aria-rowindex="25">
                   <th>
                     <a href="/data-management/link-css"
                       ><b
@@ -2151,7 +2203,7 @@ <h2>Test Plans Status Summary</h2>
                   <td>
                     <div class="phase-cell" role="list" aria-setsize="2">
                       <span class="styled-pill full-width auto-width"
-                        ><a href="/test-review/85"
+                        ><a href="/test-review/86"
                           ><span
                             ><svg
                               aria-hidden="true"
@@ -2184,7 +2236,7 @@ <h2>Test Plans Status Summary</h2>
                   </td>
                   <td><span class="none centered absolute">None Yet</span></td>
                 </tr>
-                <tr aria-rowindex="25">
+                <tr aria-rowindex="26">
                   <th>
                     <a href="/data-management/main"><b>Main Landmark</b></a>
                   </th>
@@ -2236,7 +2288,7 @@ <h2>Test Plans Status Summary</h2>
                   </td>
                   <td><span class="none centered absolute">None Yet</span></td>
                 </tr>
-                <tr aria-rowindex="26">
+                <tr aria-rowindex="27">
                   <th>
                     <a href="/data-management/seek-slider"
                       ><b>Media Seek Slider</b></a
@@ -2257,7 +2309,7 @@ <h2>Test Plans Status Summary</h2>
                   <td>
                     <div class="phase-cell" role="list" aria-setsize="2">
                       <span class="styled-pill full-width auto-width"
-                        ><a href="/test-review/94"
+                        ><a href="/test-review/95"
                           ><span
                             ><svg
                               aria-hidden="true"
@@ -2290,7 +2342,7 @@ <h2>Test Plans Status Summary</h2>
                   </td>
                   <td><span class="none centered absolute">None Yet</span></td>
                 </tr>
-                <tr aria-rowindex="27">
+                <tr aria-rowindex="28">
                   <th>
                     <a href="/data-management/meter"><b>Meter</b></a>
                   </th>
@@ -2342,7 +2394,7 @@ <h2>Test Plans Status Summary</h2>
                   </td>
                   <td><span class="none centered absolute">None Yet</span></td>
                 </tr>
-                <tr aria-rowindex="28">
+                <tr aria-rowindex="29">
                   <th>
                     <a href="/data-management/menu-button-navigation"
                       ><b>Navigation Menu Button</b></a
@@ -2363,7 +2415,7 @@ <h2>Test Plans Status Summary</h2>
                   <td>
                     <div class="phase-cell" role="list" aria-setsize="2">
                       <span class="styled-pill full-width auto-width"
-                        ><a href="/test-review/89"
+                        ><a href="/test-review/90"
                           ><span
                             ><svg
                               aria-hidden="true"
@@ -2396,7 +2448,7 @@ <h2>Test Plans Status Summary</h2>
                   </td>
                   <td><span class="none centered absolute">None Yet</span></td>
                 </tr>
-                <tr aria-rowindex="29">
+                <tr aria-rowindex="30">
                   <th>
                     <a href="/data-management/radiogroup-roving-tabindex"
                       ><b>Radio Group Example Using Roving tabindex</b></a
@@ -2417,7 +2469,7 @@ <h2>Test Plans Status Summary</h2>
                   <td>
                     <div class="phase-cell" role="list" aria-setsize="2">
                       <span class="styled-pill full-width auto-width"
-                        ><a href="/test-review/92"
+                        ><a href="/test-review/93"
                           ><span
                             ><svg
                               aria-hidden="true"
@@ -2450,7 +2502,7 @@ <h2>Test Plans Status Summary</h2>
                   </td>
                   <td><span class="none centered absolute">None Yet</span></td>
                 </tr>
-                <tr aria-rowindex="30">
+                <tr aria-rowindex="31">
                   <th>
                     <a href="/data-management/radiogroup-aria-activedescendant"
                       ><b>Radio Group Example Using aria-activedescendant</b></a
@@ -2471,7 +2523,7 @@ <h2>Test Plans Status Summary</h2>
                   <td>
                     <div class="phase-cell" role="list" aria-setsize="2">
                       <span class="styled-pill full-width auto-width"
-                        ><a href="/test-review/91"
+                        ><a href="/test-review/92"
                           ><span
                             ><svg
                               aria-hidden="true"
@@ -2504,7 +2556,7 @@ <h2>Test Plans Status Summary</h2>
                   </td>
                   <td><span class="none centered absolute">None Yet</span></td>
                 </tr>
-                <tr aria-rowindex="31">
+                <tr aria-rowindex="32">
                   <th>
                     <a href="/data-management/rating-radio-group"
                       ><b>Rating Radio Group</b></a
@@ -2525,7 +2577,7 @@ <h2>Test Plans Status Summary</h2>
                   <td>
                     <div class="phase-cell" role="list" aria-setsize="2">
                       <span class="styled-pill full-width auto-width"
-                        ><a href="/test-review/93"
+                        ><a href="/test-review/94"
                           ><span
                             ><svg
                               aria-hidden="true"
@@ -2558,7 +2610,7 @@ <h2>Test Plans Status Summary</h2>
                   </td>
                   <td><span class="none centered absolute">None Yet</span></td>
                 </tr>
-                <tr aria-rowindex="32">
+                <tr aria-rowindex="33">
                   <th>
                     <a href="/data-management/rating-slider"
                       ><b>Rating Slider</b></a
@@ -2612,7 +2664,7 @@ <h2>Test Plans Status Summary</h2>
                   </td>
                   <td><span class="none centered absolute">None Yet</span></td>
                 </tr>
-                <tr aria-rowindex="33">
+                <tr aria-rowindex="34">
                   <th>
                     <a href="/data-management/switch"><b>Switch Example</b></a>
                   </th>
@@ -2664,7 +2716,7 @@ <h2>Test Plans Status Summary</h2>
                   </td>
                   <td><span class="none centered absolute">None Yet</span></td>
                 </tr>
-                <tr aria-rowindex="34">
+                <tr aria-rowindex="35">
                   <th>
                     <a href="/data-management/tabs-manual-activation"
                       ><b>Tabs with Manual Activation</b></a
@@ -2718,7 +2770,7 @@ <h2>Test Plans Status Summary</h2>
                   </td>
                   <td><span class="none centered absolute">None Yet</span></td>
                 </tr>
-                <tr aria-rowindex="35">
+                <tr aria-rowindex="36">
                   <th>
                     <a href="/data-management/vertical-temperature-slider"
                       ><b>Vertical Temperature Slider</b></a
@@ -2739,7 +2791,7 @@ <h2>Test Plans Status Summary</h2>
                   <td>
                     <div class="phase-cell" role="list" aria-setsize="2">
                       <span class="styled-pill full-width auto-width"
-                        ><a href="/test-review/96"
+                        ><a href="/test-review/97"
                           ><span
                             ><svg
                               aria-hidden="true"
diff --git a/client/tests/e2e/snapshots/saved/_report_67_targets_20.html b/client/tests/e2e/snapshots/saved/_report_67_targets_20.html
index 7ecf1e28a..87603a2ac 100644
--- a/client/tests/e2e/snapshots/saved/_report_67_targets_20.html
+++ b/client/tests/e2e/snapshots/saved/_report_67_targets_20.html
@@ -399,11 +399,40 @@ <h2 id="failing-assertions-heading">
                   </td>
                   <td>Shift+X</td>
                   <td>SHOULD</td>
+                  <td>Moderate negative side effects do not occur</td>
+                  <td>Other</td>
+                </tr>
+              </tbody>
+            </table>
+          </div>
+          <h2 id="negative-side-effects-heading">
+            Summary of Negative Side Effects (0 severe, 1 moderate)
+          </h2>
+          <div class="table-responsive">
+            <table
+              aria-labelledby="negative-side-effects-heading"
+              class="table table-bordered">
+              <thead>
+                <tr>
+                  <th>Test Name</th>
+                  <th>Command</th>
+                  <th>Side Effect</th>
+                  <th>Details</th>
+                  <th>Impact</th>
+                </tr>
+              </thead>
+              <tbody>
+                <tr>
                   <td>
-                    Other behaviors that create moderate negative impacts are
-                    not exhibited
+                    <a
+                      href="/report/67/targets/20#result-ODhiYeyIxMiI6MjB9TRkYW"
+                      >Navigate backwards to a mixed checkbox in reading mode</a
+                    >
                   </td>
+                  <td>Shift+X</td>
                   <td>Other</td>
+                  <td>Seeded other unexpected behavior</td>
+                  <td>MODERATE</td>
                 </tr>
               </tbody>
             </table>
@@ -411,7 +440,7 @@ <h2 id="failing-assertions-heading">
           <div class="test-result-heading">
             <h2 id="result-NjAyYeyIxMiI6MjB92VjN2" tabindex="-1">
               Test 1: Navigate forwards to a mixed checkbox in reading
-              mode&nbsp;(28 passed,&nbsp;0 failed,&nbsp;0 unsupported)
+              mode&nbsp;(28 passed, 0 failed, 0 unsupported)
               <div class="disclaimer-info-container">
                 <details>
                   <summary
@@ -536,24 +565,18 @@ <h4>
                   </tr>
                   <tr>
                     <td>MUST</td>
-                    <td>
-                      Other behaviors that create severe negative impacts are
-                      not exhibited
-                    </td>
+                    <td>Severe negative side effects do not occur</td>
                     <td>Passed</td>
                   </tr>
                   <tr>
                     <td>SHOULD</td>
-                    <td>
-                      Other behaviors that create moderate negative impacts are
-                      not exhibited
-                    </td>
+                    <td>Moderate negative side effects do not occur</td>
                     <td>Passed</td>
                   </tr>
                 </tbody>
               </table>
             </div>
-            Other behaviors that create negative impact: None
+            The command 'X' did not cause any negative side effects.
             <hr aria-hidden="true" />
             <h4>
               F&nbsp;Results:&nbsp;7 passed,&nbsp;0 failed,&nbsp;0 unsupported
@@ -604,24 +627,18 @@ <h4>
                   </tr>
                   <tr>
                     <td>MUST</td>
-                    <td>
-                      Other behaviors that create severe negative impacts are
-                      not exhibited
-                    </td>
+                    <td>Severe negative side effects do not occur</td>
                     <td>Passed</td>
                   </tr>
                   <tr>
                     <td>SHOULD</td>
-                    <td>
-                      Other behaviors that create moderate negative impacts are
-                      not exhibited
-                    </td>
+                    <td>Moderate negative side effects do not occur</td>
                     <td>Passed</td>
                   </tr>
                 </tbody>
               </table>
             </div>
-            Other behaviors that create negative impact: None
+            The command 'F' did not cause any negative side effects.
             <hr aria-hidden="true" />
             <h4>
               Tab&nbsp;Results:&nbsp;7 passed,&nbsp;0 failed,&nbsp;0 unsupported
@@ -672,24 +689,18 @@ <h4>
                   </tr>
                   <tr>
                     <td>MUST</td>
-                    <td>
-                      Other behaviors that create severe negative impacts are
-                      not exhibited
-                    </td>
+                    <td>Severe negative side effects do not occur</td>
                     <td>Passed</td>
                   </tr>
                   <tr>
                     <td>SHOULD</td>
-                    <td>
-                      Other behaviors that create moderate negative impacts are
-                      not exhibited
-                    </td>
+                    <td>Moderate negative side effects do not occur</td>
                     <td>Passed</td>
                   </tr>
                 </tbody>
               </table>
             </div>
-            Other behaviors that create negative impact: None
+            The command 'Tab' did not cause any negative side effects.
             <hr aria-hidden="true" />
             <h4>
               Down Arrow then Down Arrow&nbsp;Results:&nbsp;7 passed,&nbsp;0
@@ -741,24 +752,19 @@ <h4>
                   </tr>
                   <tr>
                     <td>MUST</td>
-                    <td>
-                      Other behaviors that create severe negative impacts are
-                      not exhibited
-                    </td>
+                    <td>Severe negative side effects do not occur</td>
                     <td>Passed</td>
                   </tr>
                   <tr>
                     <td>SHOULD</td>
-                    <td>
-                      Other behaviors that create moderate negative impacts are
-                      not exhibited
-                    </td>
+                    <td>Moderate negative side effects do not occur</td>
                     <td>Passed</td>
                   </tr>
                 </tbody>
               </table>
             </div>
-            Other behaviors that create negative impact: None
+            The command 'Down Arrow then Down Arrow' did not cause any negative
+            side effects.
           </div>
           <div class="disclosure-container">
             <h3 class="disclosure-heading">
@@ -804,7 +810,7 @@ <h3 class="disclosure-heading">
           <div class="test-result-heading">
             <h2 id="result-YWJlZeyIxMiI6MjB9jEzNm" tabindex="-1">
               Test 2: Navigate forwards to a mixed checkbox in interaction
-              mode&nbsp;(7 passed,&nbsp;0 failed,&nbsp;0 unsupported)
+              mode&nbsp;(7 passed, 0 failed, 0 unsupported)
               <div class="disclaimer-info-container">
                 <details>
                   <summary
@@ -929,24 +935,18 @@ <h4>
                   </tr>
                   <tr>
                     <td>MUST</td>
-                    <td>
-                      Other behaviors that create severe negative impacts are
-                      not exhibited
-                    </td>
+                    <td>Severe negative side effects do not occur</td>
                     <td>Passed</td>
                   </tr>
                   <tr>
                     <td>SHOULD</td>
-                    <td>
-                      Other behaviors that create moderate negative impacts are
-                      not exhibited
-                    </td>
+                    <td>Moderate negative side effects do not occur</td>
                     <td>Passed</td>
                   </tr>
                 </tbody>
               </table>
             </div>
-            Other behaviors that create negative impact: None
+            The command 'Tab' did not cause any negative side effects.
           </div>
           <div class="disclosure-container">
             <h3 class="disclosure-heading">
@@ -992,7 +992,7 @@ <h3 class="disclosure-heading">
           <div class="test-result-heading">
             <h2 id="result-ODhiYeyIxMiI6MjB9TRkYW" tabindex="-1">
               Test 3: Navigate backwards to a mixed checkbox in reading
-              mode&nbsp;(27 passed,&nbsp;1 failed,&nbsp;0 unsupported)
+              mode&nbsp;(27 passed, 1 failed, 0 unsupported)
               <div class="disclaimer-info-container">
                 <details>
                   <summary
@@ -1093,10 +1093,7 @@ <h4>
                 <tbody>
                   <tr>
                     <td>SHOULD</td>
-                    <td>
-                      Other behaviors that create moderate negative impacts are
-                      not exhibited
-                    </td>
+                    <td>Moderate negative side effects do not occur</td>
                     <td>Failed</td>
                   </tr>
                   <tr>
@@ -1126,23 +1123,20 @@ <h4>
                   </tr>
                   <tr>
                     <td>MUST</td>
-                    <td>
-                      Other behaviors that create severe negative impacts are
-                      not exhibited
-                    </td>
+                    <td>Severe negative side effects do not occur</td>
                     <td>Passed</td>
                   </tr>
                 </tbody>
               </table>
             </div>
-            Other behaviors that create negative impact:
+            <h4>Negative side effects of Shift+X</h4>
             <div class="table-responsive">
               <table
-                aria-label="Undesirable behaviors for test Navigate backwards to a mixed checkbox in reading mode"
+                aria-label="Negative side effects of Shift+X"
                 class="test-plan-unexpected-behaviors-table table table-bordered">
                 <thead>
                   <tr>
-                    <th>Behavior</th>
+                    <th>Side Effect</th>
                     <th>Details</th>
                     <th>Impact</th>
                   </tr>
@@ -1207,24 +1201,18 @@ <h4>
                   </tr>
                   <tr>
                     <td>MUST</td>
-                    <td>
-                      Other behaviors that create severe negative impacts are
-                      not exhibited
-                    </td>
+                    <td>Severe negative side effects do not occur</td>
                     <td>Passed</td>
                   </tr>
                   <tr>
                     <td>SHOULD</td>
-                    <td>
-                      Other behaviors that create moderate negative impacts are
-                      not exhibited
-                    </td>
+                    <td>Moderate negative side effects do not occur</td>
                     <td>Passed</td>
                   </tr>
                 </tbody>
               </table>
             </div>
-            Other behaviors that create negative impact: None
+            The command 'Shift+F' did not cause any negative side effects.
             <hr aria-hidden="true" />
             <h4>
               Shift+Tab&nbsp;Results:&nbsp;7 passed,&nbsp;0 failed,&nbsp;0
@@ -1276,24 +1264,18 @@ <h4>
                   </tr>
                   <tr>
                     <td>MUST</td>
-                    <td>
-                      Other behaviors that create severe negative impacts are
-                      not exhibited
-                    </td>
+                    <td>Severe negative side effects do not occur</td>
                     <td>Passed</td>
                   </tr>
                   <tr>
                     <td>SHOULD</td>
-                    <td>
-                      Other behaviors that create moderate negative impacts are
-                      not exhibited
-                    </td>
+                    <td>Moderate negative side effects do not occur</td>
                     <td>Passed</td>
                   </tr>
                 </tbody>
               </table>
             </div>
-            Other behaviors that create negative impact: None
+            The command 'Shift+Tab' did not cause any negative side effects.
             <hr aria-hidden="true" />
             <h4>
               Up Arrow then Up Arrow&nbsp;Results:&nbsp;7 passed,&nbsp;0
@@ -1345,24 +1327,19 @@ <h4>
                   </tr>
                   <tr>
                     <td>MUST</td>
-                    <td>
-                      Other behaviors that create severe negative impacts are
-                      not exhibited
-                    </td>
+                    <td>Severe negative side effects do not occur</td>
                     <td>Passed</td>
                   </tr>
                   <tr>
                     <td>SHOULD</td>
-                    <td>
-                      Other behaviors that create moderate negative impacts are
-                      not exhibited
-                    </td>
+                    <td>Moderate negative side effects do not occur</td>
                     <td>Passed</td>
                   </tr>
                 </tbody>
               </table>
             </div>
-            Other behaviors that create negative impact: None
+            The command 'Up Arrow then Up Arrow' did not cause any negative side
+            effects.
           </div>
           <div class="disclosure-container">
             <h3 class="disclosure-heading">
@@ -1408,7 +1385,7 @@ <h3 class="disclosure-heading">
           <div class="test-result-heading">
             <h2 id="result-NDZmYeyIxMiI6MjB9jg3Nm" tabindex="-1">
               Test 4: Navigate backwards to a mixed checkbox in interaction
-              mode&nbsp;(7 passed,&nbsp;0 failed,&nbsp;0 unsupported)
+              mode&nbsp;(7 passed, 0 failed, 0 unsupported)
               <div class="disclaimer-info-container">
                 <details>
                   <summary
@@ -1534,24 +1511,18 @@ <h4>
                   </tr>
                   <tr>
                     <td>MUST</td>
-                    <td>
-                      Other behaviors that create severe negative impacts are
-                      not exhibited
-                    </td>
+                    <td>Severe negative side effects do not occur</td>
                     <td>Passed</td>
                   </tr>
                   <tr>
                     <td>SHOULD</td>
-                    <td>
-                      Other behaviors that create moderate negative impacts are
-                      not exhibited
-                    </td>
+                    <td>Moderate negative side effects do not occur</td>
                     <td>Passed</td>
                   </tr>
                 </tbody>
               </table>
             </div>
-            Other behaviors that create negative impact: None
+            The command 'Shift+Tab' did not cause any negative side effects.
           </div>
           <div class="disclosure-container">
             <h3 class="disclosure-heading">
@@ -1597,7 +1568,7 @@ <h3 class="disclosure-heading">
           <div class="test-result-heading">
             <h2 id="result-OTBlYeyIxMiI6MjB9jY5Mz" tabindex="-1">
               Test 5: Read information about a mixed checkbox in reading
-              mode&nbsp;(14 passed,&nbsp;0 failed,&nbsp;0 unsupported)
+              mode&nbsp;(14 passed, 0 failed, 0 unsupported)
               <div class="disclaimer-info-container">
                 <details>
                   <summary
@@ -1713,10 +1684,7 @@ <h4>
                   </tr>
                   <tr>
                     <td>MUST</td>
-                    <td>
-                      Other behaviors that create severe negative impacts are
-                      not exhibited
-                    </td>
+                    <td>Severe negative side effects do not occur</td>
                     <td>Passed</td>
                   </tr>
                   <tr>
@@ -1731,16 +1699,13 @@ <h4>
                   </tr>
                   <tr>
                     <td>SHOULD</td>
-                    <td>
-                      Other behaviors that create moderate negative impacts are
-                      not exhibited
-                    </td>
+                    <td>Moderate negative side effects do not occur</td>
                     <td>Passed</td>
                   </tr>
                 </tbody>
               </table>
             </div>
-            Other behaviors that create negative impact: None
+            The command 'Insert+Tab' did not cause any negative side effects.
             <hr aria-hidden="true" />
             <h4>
               Insert+Up&nbsp;Results:&nbsp;7 passed,&nbsp;0 failed,&nbsp;0
@@ -1782,10 +1747,7 @@ <h4>
                   </tr>
                   <tr>
                     <td>MUST</td>
-                    <td>
-                      Other behaviors that create severe negative impacts are
-                      not exhibited
-                    </td>
+                    <td>Severe negative side effects do not occur</td>
                     <td>Passed</td>
                   </tr>
                   <tr>
@@ -1800,16 +1762,13 @@ <h4>
                   </tr>
                   <tr>
                     <td>SHOULD</td>
-                    <td>
-                      Other behaviors that create moderate negative impacts are
-                      not exhibited
-                    </td>
+                    <td>Moderate negative side effects do not occur</td>
                     <td>Passed</td>
                   </tr>
                 </tbody>
               </table>
             </div>
-            Other behaviors that create negative impact: None
+            The command 'Insert+Up' did not cause any negative side effects.
           </div>
           <div class="disclosure-container">
             <h3 class="disclosure-heading">
@@ -1855,7 +1814,7 @@ <h3 class="disclosure-heading">
           <div class="test-result-heading">
             <h2 id="result-ZDg3NeyIxMiI6MjB9zcwMj" tabindex="-1">
               Test 6: Read information about a mixed checkbox in interaction
-              mode&nbsp;(14 passed,&nbsp;0 failed,&nbsp;0 unsupported)
+              mode&nbsp;(14 passed, 0 failed, 0 unsupported)
               <div class="disclaimer-info-container">
                 <details>
                   <summary
@@ -1971,10 +1930,7 @@ <h4>
                   </tr>
                   <tr>
                     <td>MUST</td>
-                    <td>
-                      Other behaviors that create severe negative impacts are
-                      not exhibited
-                    </td>
+                    <td>Severe negative side effects do not occur</td>
                     <td>Passed</td>
                   </tr>
                   <tr>
@@ -1989,16 +1945,13 @@ <h4>
                   </tr>
                   <tr>
                     <td>SHOULD</td>
-                    <td>
-                      Other behaviors that create moderate negative impacts are
-                      not exhibited
-                    </td>
+                    <td>Moderate negative side effects do not occur</td>
                     <td>Passed</td>
                   </tr>
                 </tbody>
               </table>
             </div>
-            Other behaviors that create negative impact: None
+            The command 'Insert+Tab' did not cause any negative side effects.
             <hr aria-hidden="true" />
             <h4>
               Insert+Up&nbsp;Results:&nbsp;7 passed,&nbsp;0 failed,&nbsp;0
@@ -2040,10 +1993,7 @@ <h4>
                   </tr>
                   <tr>
                     <td>MUST</td>
-                    <td>
-                      Other behaviors that create severe negative impacts are
-                      not exhibited
-                    </td>
+                    <td>Severe negative side effects do not occur</td>
                     <td>Passed</td>
                   </tr>
                   <tr>
@@ -2058,16 +2008,13 @@ <h4>
                   </tr>
                   <tr>
                     <td>SHOULD</td>
-                    <td>
-                      Other behaviors that create moderate negative impacts are
-                      not exhibited
-                    </td>
+                    <td>Moderate negative side effects do not occur</td>
                     <td>Passed</td>
                   </tr>
                 </tbody>
               </table>
             </div>
-            Other behaviors that create negative impact: None
+            The command 'Insert+Up' did not cause any negative side effects.
           </div>
           <div class="disclosure-container">
             <h3 class="disclosure-heading">
@@ -2112,8 +2059,8 @@ <h3 class="disclosure-heading">
           </div>
           <div class="test-result-heading">
             <h2 id="result-MjJhZeyIxMiI6MjB9TRiZG" tabindex="-1">
-              Test 7: Operate a mixed checkbox in reading mode&nbsp;(3
-              passed,&nbsp;0 failed,&nbsp;0 unsupported)
+              Test 7: Operate a mixed checkbox in reading mode&nbsp;(3 passed, 0
+              failed, 0 unsupported)
               <div class="disclaimer-info-container">
                 <details>
                   <summary
@@ -2219,24 +2166,18 @@ <h4>
                   </tr>
                   <tr>
                     <td>MUST</td>
-                    <td>
-                      Other behaviors that create severe negative impacts are
-                      not exhibited
-                    </td>
+                    <td>Severe negative side effects do not occur</td>
                     <td>Passed</td>
                   </tr>
                   <tr>
                     <td>SHOULD</td>
-                    <td>
-                      Other behaviors that create moderate negative impacts are
-                      not exhibited
-                    </td>
+                    <td>Moderate negative side effects do not occur</td>
                     <td>Passed</td>
                   </tr>
                 </tbody>
               </table>
             </div>
-            Other behaviors that create negative impact: None
+            The command 'Space' did not cause any negative side effects.
           </div>
           <div class="disclosure-container">
             <h3 class="disclosure-heading">
@@ -2282,7 +2223,7 @@ <h3 class="disclosure-heading">
           <div class="test-result-heading">
             <h2 id="result-MjNmMeyIxMiI6MjB9zIwOD" tabindex="-1">
               Test 8: Operate a mixed checkbox in interaction mode&nbsp;(3
-              passed,&nbsp;0 failed,&nbsp;0 unsupported)
+              passed, 0 failed, 0 unsupported)
               <div class="disclaimer-info-container">
                 <details>
                   <summary
@@ -2388,24 +2329,18 @@ <h4>
                   </tr>
                   <tr>
                     <td>MUST</td>
-                    <td>
-                      Other behaviors that create severe negative impacts are
-                      not exhibited
-                    </td>
+                    <td>Severe negative side effects do not occur</td>
                     <td>Passed</td>
                   </tr>
                   <tr>
                     <td>SHOULD</td>
-                    <td>
-                      Other behaviors that create moderate negative impacts are
-                      not exhibited
-                    </td>
+                    <td>Moderate negative side effects do not occur</td>
                     <td>Passed</td>
                   </tr>
                 </tbody>
               </table>
             </div>
-            Other behaviors that create negative impact: None
+            The command 'Space' did not cause any negative side effects.
           </div>
           <div class="disclosure-container">
             <h3 class="disclosure-heading">
@@ -2451,7 +2386,7 @@ <h3 class="disclosure-heading">
           <div class="test-result-heading">
             <h2 id="result-OTNhZeyIxMiI6MjB9jAwMT" tabindex="-1">
               Test 9: Operate an unchecked checkbox in reading mode&nbsp;(3
-              passed,&nbsp;0 failed,&nbsp;0 unsupported)
+              passed, 0 failed, 0 unsupported)
               <div class="disclaimer-info-container">
                 <details>
                   <summary
@@ -2557,24 +2492,18 @@ <h4>
                   </tr>
                   <tr>
                     <td>MUST</td>
-                    <td>
-                      Other behaviors that create severe negative impacts are
-                      not exhibited
-                    </td>
+                    <td>Severe negative side effects do not occur</td>
                     <td>Passed</td>
                   </tr>
                   <tr>
                     <td>SHOULD</td>
-                    <td>
-                      Other behaviors that create moderate negative impacts are
-                      not exhibited
-                    </td>
+                    <td>Moderate negative side effects do not occur</td>
                     <td>Passed</td>
                   </tr>
                 </tbody>
               </table>
             </div>
-            Other behaviors that create negative impact: None
+            The command 'Space' did not cause any negative side effects.
           </div>
           <div class="disclosure-container">
             <h3 class="disclosure-heading">
@@ -2620,7 +2549,7 @@ <h3 class="disclosure-heading">
           <div class="test-result-heading">
             <h2 id="result-ZDUzZeyIxMiI6MjB9GM0MD" tabindex="-1">
               Test 10: Operate an unchecked checkbox in interaction mode&nbsp;(3
-              passed,&nbsp;0 failed,&nbsp;0 unsupported)
+              passed, 0 failed, 0 unsupported)
               <div class="disclaimer-info-container">
                 <details>
                   <summary
@@ -2726,24 +2655,18 @@ <h4>
                   </tr>
                   <tr>
                     <td>MUST</td>
-                    <td>
-                      Other behaviors that create severe negative impacts are
-                      not exhibited
-                    </td>
+                    <td>Severe negative side effects do not occur</td>
                     <td>Passed</td>
                   </tr>
                   <tr>
                     <td>SHOULD</td>
-                    <td>
-                      Other behaviors that create moderate negative impacts are
-                      not exhibited
-                    </td>
+                    <td>Moderate negative side effects do not occur</td>
                     <td>Passed</td>
                   </tr>
                 </tbody>
               </table>
             </div>
-            Other behaviors that create negative impact: None
+            The command 'Space' did not cause any negative side effects.
           </div>
           <div class="disclosure-container">
             <h3 class="disclosure-heading">
@@ -2789,7 +2712,7 @@ <h3 class="disclosure-heading">
           <div class="test-result-heading">
             <h2 id="result-YTMzNeyIxMiI6MjB9mNjMz" tabindex="-1">
               Test 11: Navigate forwards out of a checkbox group in reading
-              mode&nbsp;(20 passed,&nbsp;0 failed,&nbsp;0 unsupported)
+              mode&nbsp;(20 passed, 0 failed, 0 unsupported)
               <div class="disclaimer-info-container">
                 <details>
                   <summary
@@ -2905,24 +2828,18 @@ <h4>
                   </tr>
                   <tr>
                     <td>MUST</td>
-                    <td>
-                      Other behaviors that create severe negative impacts are
-                      not exhibited
-                    </td>
+                    <td>Severe negative side effects do not occur</td>
                     <td>Passed</td>
                   </tr>
                   <tr>
                     <td>SHOULD</td>
-                    <td>
-                      Other behaviors that create moderate negative impacts are
-                      not exhibited
-                    </td>
+                    <td>Moderate negative side effects do not occur</td>
                     <td>Passed</td>
                   </tr>
                 </tbody>
               </table>
             </div>
-            Other behaviors that create negative impact: None
+            The command 'Down Arrow' did not cause any negative side effects.
             <hr aria-hidden="true" />
             <h4>
               U&nbsp;Results:&nbsp;5 passed,&nbsp;0 failed,&nbsp;0 unsupported
@@ -2963,24 +2880,18 @@ <h4>
                   </tr>
                   <tr>
                     <td>MUST</td>
-                    <td>
-                      Other behaviors that create severe negative impacts are
-                      not exhibited
-                    </td>
+                    <td>Severe negative side effects do not occur</td>
                     <td>Passed</td>
                   </tr>
                   <tr>
                     <td>SHOULD</td>
-                    <td>
-                      Other behaviors that create moderate negative impacts are
-                      not exhibited
-                    </td>
+                    <td>Moderate negative side effects do not occur</td>
                     <td>Passed</td>
                   </tr>
                 </tbody>
               </table>
             </div>
-            Other behaviors that create negative impact: None
+            The command 'U' did not cause any negative side effects.
             <hr aria-hidden="true" />
             <h4>
               K&nbsp;Results:&nbsp;5 passed,&nbsp;0 failed,&nbsp;0 unsupported
@@ -3021,24 +2932,18 @@ <h4>
                   </tr>
                   <tr>
                     <td>MUST</td>
-                    <td>
-                      Other behaviors that create severe negative impacts are
-                      not exhibited
-                    </td>
+                    <td>Severe negative side effects do not occur</td>
                     <td>Passed</td>
                   </tr>
                   <tr>
                     <td>SHOULD</td>
-                    <td>
-                      Other behaviors that create moderate negative impacts are
-                      not exhibited
-                    </td>
+                    <td>Moderate negative side effects do not occur</td>
                     <td>Passed</td>
                   </tr>
                 </tbody>
               </table>
             </div>
-            Other behaviors that create negative impact: None
+            The command 'K' did not cause any negative side effects.
             <hr aria-hidden="true" />
             <h4>
               Tab&nbsp;Results:&nbsp;5 passed,&nbsp;0 failed,&nbsp;0 unsupported
@@ -3079,24 +2984,18 @@ <h4>
                   </tr>
                   <tr>
                     <td>MUST</td>
-                    <td>
-                      Other behaviors that create severe negative impacts are
-                      not exhibited
-                    </td>
+                    <td>Severe negative side effects do not occur</td>
                     <td>Passed</td>
                   </tr>
                   <tr>
                     <td>SHOULD</td>
-                    <td>
-                      Other behaviors that create moderate negative impacts are
-                      not exhibited
-                    </td>
+                    <td>Moderate negative side effects do not occur</td>
                     <td>Passed</td>
                   </tr>
                 </tbody>
               </table>
             </div>
-            Other behaviors that create negative impact: None
+            The command 'Tab' did not cause any negative side effects.
           </div>
           <div class="disclosure-container">
             <h3 class="disclosure-heading">
@@ -3142,7 +3041,7 @@ <h3 class="disclosure-heading">
           <div class="test-result-heading">
             <h2 id="result-YzJlYeyIxMiI6MjB9jdkZG" tabindex="-1">
               Test 12: Navigate forwards out of a checkbox group in interaction
-              mode&nbsp;(5 passed,&nbsp;0 failed,&nbsp;0 unsupported)
+              mode&nbsp;(5 passed, 0 failed, 0 unsupported)
               <div class="disclaimer-info-container">
                 <details>
                   <summary
@@ -3257,24 +3156,18 @@ <h4>
                   </tr>
                   <tr>
                     <td>MUST</td>
-                    <td>
-                      Other behaviors that create severe negative impacts are
-                      not exhibited
-                    </td>
+                    <td>Severe negative side effects do not occur</td>
                     <td>Passed</td>
                   </tr>
                   <tr>
                     <td>SHOULD</td>
-                    <td>
-                      Other behaviors that create moderate negative impacts are
-                      not exhibited
-                    </td>
+                    <td>Moderate negative side effects do not occur</td>
                     <td>Passed</td>
                   </tr>
                 </tbody>
               </table>
             </div>
-            Other behaviors that create negative impact: None
+            The command 'Tab' did not cause any negative side effects.
           </div>
           <div class="disclosure-container">
             <h3 class="disclosure-heading">
@@ -3320,7 +3213,7 @@ <h3 class="disclosure-heading">
           <div class="test-result-heading">
             <h2 id="result-MmM4OeyIxMiI6MjB9DBjZD" tabindex="-1">
               Test 13: Navigate backwards out of a checkbox group in reading
-              mode&nbsp;(20 passed,&nbsp;0 failed,&nbsp;0 unsupported)
+              mode&nbsp;(20 passed, 0 failed, 0 unsupported)
               <div class="disclaimer-info-container">
                 <details>
                   <summary
@@ -3436,24 +3329,19 @@ <h4>
                   </tr>
                   <tr>
                     <td>MUST</td>
-                    <td>
-                      Other behaviors that create severe negative impacts are
-                      not exhibited
-                    </td>
+                    <td>Severe negative side effects do not occur</td>
                     <td>Passed</td>
                   </tr>
                   <tr>
                     <td>SHOULD</td>
-                    <td>
-                      Other behaviors that create moderate negative impacts are
-                      not exhibited
-                    </td>
+                    <td>Moderate negative side effects do not occur</td>
                     <td>Passed</td>
                   </tr>
                 </tbody>
               </table>
             </div>
-            Other behaviors that create negative impact: None
+            The command 'Up Arrow then Up Arrow' did not cause any negative side
+            effects.
             <hr aria-hidden="true" />
             <h4>
               Shift+K&nbsp;Results:&nbsp;5 passed,&nbsp;0 failed,&nbsp;0
@@ -3495,24 +3383,18 @@ <h4>
                   </tr>
                   <tr>
                     <td>MUST</td>
-                    <td>
-                      Other behaviors that create severe negative impacts are
-                      not exhibited
-                    </td>
+                    <td>Severe negative side effects do not occur</td>
                     <td>Passed</td>
                   </tr>
                   <tr>
                     <td>SHOULD</td>
-                    <td>
-                      Other behaviors that create moderate negative impacts are
-                      not exhibited
-                    </td>
+                    <td>Moderate negative side effects do not occur</td>
                     <td>Passed</td>
                   </tr>
                 </tbody>
               </table>
             </div>
-            Other behaviors that create negative impact: None
+            The command 'Shift+K' did not cause any negative side effects.
             <hr aria-hidden="true" />
             <h4>
               Shift+U&nbsp;Results:&nbsp;5 passed,&nbsp;0 failed,&nbsp;0
@@ -3554,24 +3436,18 @@ <h4>
                   </tr>
                   <tr>
                     <td>MUST</td>
-                    <td>
-                      Other behaviors that create severe negative impacts are
-                      not exhibited
-                    </td>
+                    <td>Severe negative side effects do not occur</td>
                     <td>Passed</td>
                   </tr>
                   <tr>
                     <td>SHOULD</td>
-                    <td>
-                      Other behaviors that create moderate negative impacts are
-                      not exhibited
-                    </td>
+                    <td>Moderate negative side effects do not occur</td>
                     <td>Passed</td>
                   </tr>
                 </tbody>
               </table>
             </div>
-            Other behaviors that create negative impact: None
+            The command 'Shift+U' did not cause any negative side effects.
             <hr aria-hidden="true" />
             <h4>
               Shift+Tab&nbsp;Results:&nbsp;5 passed,&nbsp;0 failed,&nbsp;0
@@ -3613,24 +3489,18 @@ <h4>
                   </tr>
                   <tr>
                     <td>MUST</td>
-                    <td>
-                      Other behaviors that create severe negative impacts are
-                      not exhibited
-                    </td>
+                    <td>Severe negative side effects do not occur</td>
                     <td>Passed</td>
                   </tr>
                   <tr>
                     <td>SHOULD</td>
-                    <td>
-                      Other behaviors that create moderate negative impacts are
-                      not exhibited
-                    </td>
+                    <td>Moderate negative side effects do not occur</td>
                     <td>Passed</td>
                   </tr>
                 </tbody>
               </table>
             </div>
-            Other behaviors that create negative impact: None
+            The command 'Shift+Tab' did not cause any negative side effects.
           </div>
           <div class="disclosure-container">
             <h3 class="disclosure-heading">
@@ -3676,7 +3546,7 @@ <h3 class="disclosure-heading">
           <div class="test-result-heading">
             <h2 id="result-YjM4MeyIxMiI6MjB9mU0OW" tabindex="-1">
               Test 14: Navigate backwards out of a checkbox group in interaction
-              mode&nbsp;(5 passed,&nbsp;0 failed,&nbsp;0 unsupported)
+              mode&nbsp;(5 passed, 0 failed, 0 unsupported)
               <div class="disclaimer-info-container">
                 <details>
                   <summary
@@ -3792,24 +3662,18 @@ <h4>
                   </tr>
                   <tr>
                     <td>MUST</td>
-                    <td>
-                      Other behaviors that create severe negative impacts are
-                      not exhibited
-                    </td>
+                    <td>Severe negative side effects do not occur</td>
                     <td>Passed</td>
                   </tr>
                   <tr>
                     <td>SHOULD</td>
-                    <td>
-                      Other behaviors that create moderate negative impacts are
-                      not exhibited
-                    </td>
+                    <td>Moderate negative side effects do not occur</td>
                     <td>Passed</td>
                   </tr>
                 </tbody>
               </table>
             </div>
-            Other behaviors that create negative impact: None
+            The command 'Shift+Tab' did not cause any negative side effects.
           </div>
           <div class="disclosure-container">
             <h3 class="disclosure-heading">
diff --git a/client/tests/e2e/snapshots/saved/_reports.html b/client/tests/e2e/snapshots/saved/_reports.html
index b1bdc1cbc..80521c4a1 100644
--- a/client/tests/e2e/snapshots/saved/_reports.html
+++ b/client/tests/e2e/snapshots/saved/_reports.html
@@ -114,14 +114,14 @@ <h2>Support Levels</h2>
                   <td>
                     <a
                       aria-label="Action Menu Button Example Using aria-activedescendant, RECOMMENDED report"
-                      href="/report/88"
+                      href="/report/89"
                       >Action Menu Button Example Using aria-activedescendant</a
                     ><span class="phase-text recommended" aria-hidden="true"
                       >Recommended</span
                     >
                   </td>
                   <td>
-                    <a aria-label="100%" href="/report/88/targets/21"
+                    <a aria-label="100%" href="/report/89/targets/21"
                       ><div class="progress">
                         <div
                           class="front"
@@ -133,7 +133,7 @@ <h2>Support Levels</h2>
                     >
                   </td>
                   <td>
-                    <a aria-label="100%" href="/report/88/targets/22"
+                    <a aria-label="100%" href="/report/89/targets/22"
                       ><div class="progress">
                         <div
                           class="front"
@@ -145,7 +145,7 @@ <h2>Support Levels</h2>
                     >
                   </td>
                   <td>
-                    <a aria-label="100%" href="/report/88/targets/23"
+                    <a aria-label="100%" href="/report/89/targets/23"
                       ><div class="progress">
                         <div
                           class="front"
@@ -157,7 +157,7 @@ <h2>Support Levels</h2>
                     >
                   </td>
                   <td>
-                    <a aria-label="100%" href="/report/88/targets/24"
+                    <a aria-label="100%" href="/report/89/targets/24"
                       ><div class="progress">
                         <div
                           class="front"
@@ -169,7 +169,7 @@ <h2>Support Levels</h2>
                     >
                   </td>
                   <td>
-                    <a aria-label="100%" href="/report/88/targets/25"
+                    <a aria-label="100%" href="/report/89/targets/25"
                       ><div class="progress">
                         <div
                           class="front"
@@ -181,7 +181,7 @@ <h2>Support Levels</h2>
                     >
                   </td>
                   <td>
-                    <a aria-label="100%" href="/report/88/targets/29"
+                    <a aria-label="100%" href="/report/89/targets/29"
                       ><div class="progress">
                         <div
                           class="front"
diff --git a/client/tests/e2e/snapshots/saved/_run_2.html b/client/tests/e2e/snapshots/saved/_run_2.html
index 02789a20f..d5265f01f 100644
--- a/client/tests/e2e/snapshots/saved/_run_2.html
+++ b/client/tests/e2e/snapshots/saved/_run_2.html
@@ -381,7 +381,7 @@ <h1>
                             combobox in reading mode
                           </h1>
                           <h2 id="overallstatus">
-                            Test Results&nbsp;(24 passed,&nbsp;0 failed,&nbsp;0
+                            Test Results&nbsp;(24 passed, 0 failed, 0
                             unsupported)
                           </h2>
                           <h3>
@@ -438,23 +438,22 @@ <h3>
                                 <tr>
                                   <td>MUST</td>
                                   <td>
-                                    Other behaviors that create severe negative
-                                    impacts are not exhibited
+                                    Severe negative side effects do not occur
                                   </td>
                                   <td>Passed</td>
                                 </tr>
                                 <tr>
                                   <td>SHOULD</td>
                                   <td>
-                                    Other behaviors that create moderate
-                                    negative impacts are not exhibited
+                                    Moderate negative side effects do not occur
                                   </td>
                                   <td>Passed</td>
                                 </tr>
                               </tbody>
                             </table>
                           </div>
-                          Other behaviors that create negative impact: None
+                          The command 'F' did not cause any negative side
+                          effects.
                           <hr aria-hidden="true" />
                           <h3>
                             C&nbsp;Results:&nbsp;6 passed,&nbsp;0 failed,&nbsp;0
@@ -510,23 +509,22 @@ <h3>
                                 <tr>
                                   <td>MUST</td>
                                   <td>
-                                    Other behaviors that create severe negative
-                                    impacts are not exhibited
+                                    Severe negative side effects do not occur
                                   </td>
                                   <td>Passed</td>
                                 </tr>
                                 <tr>
                                   <td>SHOULD</td>
                                   <td>
-                                    Other behaviors that create moderate
-                                    negative impacts are not exhibited
+                                    Moderate negative side effects do not occur
                                   </td>
                                   <td>Passed</td>
                                 </tr>
                               </tbody>
                             </table>
                           </div>
-                          Other behaviors that create negative impact: None
+                          The command 'C' did not cause any negative side
+                          effects.
                           <hr aria-hidden="true" />
                           <h3>
                             Tab&nbsp;Results:&nbsp;6 passed,&nbsp;0
@@ -582,23 +580,22 @@ <h3>
                                 <tr>
                                   <td>MUST</td>
                                   <td>
-                                    Other behaviors that create severe negative
-                                    impacts are not exhibited
+                                    Severe negative side effects do not occur
                                   </td>
                                   <td>Passed</td>
                                 </tr>
                                 <tr>
                                   <td>SHOULD</td>
                                   <td>
-                                    Other behaviors that create moderate
-                                    negative impacts are not exhibited
+                                    Moderate negative side effects do not occur
                                   </td>
                                   <td>Passed</td>
                                 </tr>
                               </tbody>
                             </table>
                           </div>
-                          Other behaviors that create negative impact: None
+                          The command 'Tab' did not cause any negative side
+                          effects.
                           <hr aria-hidden="true" />
                           <h3>
                             Down Arrow&nbsp;Results:&nbsp;6 passed,&nbsp;0
@@ -654,23 +651,22 @@ <h3>
                                 <tr>
                                   <td>MUST</td>
                                   <td>
-                                    Other behaviors that create severe negative
-                                    impacts are not exhibited
+                                    Severe negative side effects do not occur
                                   </td>
                                   <td>Passed</td>
                                 </tr>
                                 <tr>
                                   <td>SHOULD</td>
                                   <td>
-                                    Other behaviors that create moderate
-                                    negative impacts are not exhibited
+                                    Moderate negative side effects do not occur
                                   </td>
                                   <td>Passed</td>
                                 </tr>
                               </tbody>
                             </table>
                           </div>
-                          Other behaviors that create negative impact: None
+                          The command 'Down Arrow' did not cause any negative
+                          side effects.
                         </div>
                       </div>
                       <div class="row">
diff --git a/client/tests/e2e/snapshots/saved/_test-plan-report_1.html b/client/tests/e2e/snapshots/saved/_test-plan-report_1.html
index df63620cf..b31d50461 100644
--- a/client/tests/e2e/snapshots/saved/_test-plan-report_1.html
+++ b/client/tests/e2e/snapshots/saved/_test-plan-report_1.html
@@ -399,6 +399,12 @@ <h3>After 'Down Arrow'</h3>
                               </div>
                               <textarea id="speechoutput-0"></textarea>
                             </div>
+                            <label class="untestable-label"
+                              ><input type="checkbox" />The response to 'Down
+                              Arrow' created conditions that made assertions
+                              untestable, e.g., focused the wrong
+                              element.</label
+                            >
                             <fieldset class="test-renderer-fieldset">
                               <legend id="command-0-assertions-heading">
                                 Which statements are true about the response to
@@ -456,9 +462,7 @@ <h3>After 'Down Arrow'</h3>
                             <fieldset
                               class="test-renderer-fieldset"
                               id="cmd-0-problems">
-                              <legend>
-                                Were there additional undesirable behaviors?
-                              </legend>
+                              <legend>Did negative side effects occur?</legend>
                               <div>
                                 <input
                                   type="radio"
@@ -466,8 +470,8 @@ <h3>After 'Down Arrow'</h3>
                                   name="problem-0" /><label
                                   id="problem-0-true-label"
                                   for="problem-0-true"
-                                  >No, there were no additional undesirable
-                                  behaviors.</label
+                                  >No, negative side effects did not
+                                  occur.</label
                                 >
                               </div>
                               <div>
@@ -477,14 +481,13 @@ <h3>After 'Down Arrow'</h3>
                                   name="problem-0" /><label
                                   id="problem-0-false-label"
                                   for="problem-0-false"
-                                  >Yes, there were additional undesirable
-                                  behaviors</label
+                                  >Yes, negative side effects occured.</label
                                 >
                               </div>
                               <fieldset
                                 class="test-renderer-fieldset problem-select"
                                 hidden="">
-                                <legend>Undesirable behaviors</legend>
+                                <legend>Negative side effects</legend>
                                 <div class="problem-option-container">
                                   <label class="unexpected-behaviors-label"
                                     ><input
@@ -492,8 +495,7 @@ <h3>After 'Down Arrow'</h3>
                                       class="undesirable-0"
                                       value="Output is excessively verbose, e.g., includes redundant and/or irrelevant speech" />Output
                                     is excessively verbose, e.g., includes
-                                    redundant and/or irrelevant speech behavior
-                                    occurred</label
+                                    redundant and/or irrelevant speech</label
                                   ><label
                                     class="unexpected-behaviors-label off-screen"
                                     aria-hidden="true"
@@ -518,7 +520,7 @@ <h3>After 'Down Arrow'</h3>
                                       class="undesirable-0"
                                       value="Reading cursor position changed in an unexpected manner" />Reading
                                     cursor position changed in an unexpected
-                                    manner behavior occurred</label
+                                    manner</label
                                   ><label
                                     class="unexpected-behaviors-label off-screen"
                                     aria-hidden="true"
@@ -542,8 +544,7 @@ <h3>After 'Down Arrow'</h3>
                                       type="checkbox"
                                       class="undesirable-0"
                                       value="Screen reader became extremely sluggish" />Screen
-                                    reader became extremely sluggish behavior
-                                    occurred</label
+                                    reader became extremely sluggish</label
                                   ><label
                                     class="unexpected-behaviors-label off-screen"
                                     aria-hidden="true"
@@ -567,7 +568,7 @@ <h3>After 'Down Arrow'</h3>
                                       type="checkbox"
                                       class="undesirable-0"
                                       value="Screen reader crashed" />Screen
-                                    reader crashed behavior occurred</label
+                                    reader crashed</label
                                   ><label
                                     class="unexpected-behaviors-label off-screen"
                                     aria-hidden="true"
@@ -590,8 +591,8 @@ <h3>After 'Down Arrow'</h3>
                                     ><input
                                       type="checkbox"
                                       class="undesirable-0"
-                                      value="Browser crashed" />Browser crashed
-                                    behavior occurred</label
+                                      value="Browser crashed" />Browser
+                                    crashed</label
                                   ><label
                                     class="unexpected-behaviors-label off-screen"
                                     aria-hidden="true"
@@ -614,8 +615,7 @@ <h3>After 'Down Arrow'</h3>
                                     ><input
                                       type="checkbox"
                                       class="undesirable-0"
-                                      value="Other" />Other behavior
-                                    occurred</label
+                                      value="Other" />Other</label
                                   ><label
                                     class="unexpected-behaviors-label off-screen"
                                     aria-hidden="true"
@@ -659,6 +659,12 @@ <h3>After 'B'</h3>
                               </div>
                               <textarea id="speechoutput-1"></textarea>
                             </div>
+                            <label class="untestable-label"
+                              ><input type="checkbox" />The response to 'B'
+                              created conditions that made assertions
+                              untestable, e.g., focused the wrong
+                              element.</label
+                            >
                             <fieldset class="test-renderer-fieldset">
                               <legend id="command-1-assertions-heading">
                                 Which statements are true about the response to
@@ -716,9 +722,7 @@ <h3>After 'B'</h3>
                             <fieldset
                               class="test-renderer-fieldset"
                               id="cmd-1-problems">
-                              <legend>
-                                Were there additional undesirable behaviors?
-                              </legend>
+                              <legend>Did negative side effects occur?</legend>
                               <div>
                                 <input
                                   type="radio"
@@ -726,8 +730,8 @@ <h3>After 'B'</h3>
                                   name="problem-1" /><label
                                   id="problem-1-true-label"
                                   for="problem-1-true"
-                                  >No, there were no additional undesirable
-                                  behaviors.</label
+                                  >No, negative side effects did not
+                                  occur.</label
                                 >
                               </div>
                               <div>
@@ -737,14 +741,13 @@ <h3>After 'B'</h3>
                                   name="problem-1" /><label
                                   id="problem-1-false-label"
                                   for="problem-1-false"
-                                  >Yes, there were additional undesirable
-                                  behaviors</label
+                                  >Yes, negative side effects occured.</label
                                 >
                               </div>
                               <fieldset
                                 class="test-renderer-fieldset problem-select"
                                 hidden="">
-                                <legend>Undesirable behaviors</legend>
+                                <legend>Negative side effects</legend>
                                 <div class="problem-option-container">
                                   <label class="unexpected-behaviors-label"
                                     ><input
@@ -752,8 +755,7 @@ <h3>After 'B'</h3>
                                       class="undesirable-1"
                                       value="Output is excessively verbose, e.g., includes redundant and/or irrelevant speech" />Output
                                     is excessively verbose, e.g., includes
-                                    redundant and/or irrelevant speech behavior
-                                    occurred</label
+                                    redundant and/or irrelevant speech</label
                                   ><label
                                     class="unexpected-behaviors-label off-screen"
                                     aria-hidden="true"
@@ -778,7 +780,7 @@ <h3>After 'B'</h3>
                                       class="undesirable-1"
                                       value="Reading cursor position changed in an unexpected manner" />Reading
                                     cursor position changed in an unexpected
-                                    manner behavior occurred</label
+                                    manner</label
                                   ><label
                                     class="unexpected-behaviors-label off-screen"
                                     aria-hidden="true"
@@ -802,8 +804,7 @@ <h3>After 'B'</h3>
                                       type="checkbox"
                                       class="undesirable-1"
                                       value="Screen reader became extremely sluggish" />Screen
-                                    reader became extremely sluggish behavior
-                                    occurred</label
+                                    reader became extremely sluggish</label
                                   ><label
                                     class="unexpected-behaviors-label off-screen"
                                     aria-hidden="true"
@@ -827,7 +828,7 @@ <h3>After 'B'</h3>
                                       type="checkbox"
                                       class="undesirable-1"
                                       value="Screen reader crashed" />Screen
-                                    reader crashed behavior occurred</label
+                                    reader crashed</label
                                   ><label
                                     class="unexpected-behaviors-label off-screen"
                                     aria-hidden="true"
@@ -850,8 +851,8 @@ <h3>After 'B'</h3>
                                     ><input
                                       type="checkbox"
                                       class="undesirable-1"
-                                      value="Browser crashed" />Browser crashed
-                                    behavior occurred</label
+                                      value="Browser crashed" />Browser
+                                    crashed</label
                                   ><label
                                     class="unexpected-behaviors-label off-screen"
                                     aria-hidden="true"
@@ -874,8 +875,7 @@ <h3>After 'B'</h3>
                                     ><input
                                       type="checkbox"
                                       class="undesirable-1"
-                                      value="Other" />Other behavior
-                                    occurred</label
+                                      value="Other" />Other</label
                                   ><label
                                     class="unexpected-behaviors-label off-screen"
                                     aria-hidden="true"
@@ -919,6 +919,12 @@ <h3>After 'F'</h3>
                               </div>
                               <textarea id="speechoutput-2"></textarea>
                             </div>
+                            <label class="untestable-label"
+                              ><input type="checkbox" />The response to 'F'
+                              created conditions that made assertions
+                              untestable, e.g., focused the wrong
+                              element.</label
+                            >
                             <fieldset class="test-renderer-fieldset">
                               <legend id="command-2-assertions-heading">
                                 Which statements are true about the response to
@@ -976,9 +982,7 @@ <h3>After 'F'</h3>
                             <fieldset
                               class="test-renderer-fieldset"
                               id="cmd-2-problems">
-                              <legend>
-                                Were there additional undesirable behaviors?
-                              </legend>
+                              <legend>Did negative side effects occur?</legend>
                               <div>
                                 <input
                                   type="radio"
@@ -986,8 +990,8 @@ <h3>After 'F'</h3>
                                   name="problem-2" /><label
                                   id="problem-2-true-label"
                                   for="problem-2-true"
-                                  >No, there were no additional undesirable
-                                  behaviors.</label
+                                  >No, negative side effects did not
+                                  occur.</label
                                 >
                               </div>
                               <div>
@@ -997,14 +1001,13 @@ <h3>After 'F'</h3>
                                   name="problem-2" /><label
                                   id="problem-2-false-label"
                                   for="problem-2-false"
-                                  >Yes, there were additional undesirable
-                                  behaviors</label
+                                  >Yes, negative side effects occured.</label
                                 >
                               </div>
                               <fieldset
                                 class="test-renderer-fieldset problem-select"
                                 hidden="">
-                                <legend>Undesirable behaviors</legend>
+                                <legend>Negative side effects</legend>
                                 <div class="problem-option-container">
                                   <label class="unexpected-behaviors-label"
                                     ><input
@@ -1012,8 +1015,7 @@ <h3>After 'F'</h3>
                                       class="undesirable-2"
                                       value="Output is excessively verbose, e.g., includes redundant and/or irrelevant speech" />Output
                                     is excessively verbose, e.g., includes
-                                    redundant and/or irrelevant speech behavior
-                                    occurred</label
+                                    redundant and/or irrelevant speech</label
                                   ><label
                                     class="unexpected-behaviors-label off-screen"
                                     aria-hidden="true"
@@ -1038,7 +1040,7 @@ <h3>After 'F'</h3>
                                       class="undesirable-2"
                                       value="Reading cursor position changed in an unexpected manner" />Reading
                                     cursor position changed in an unexpected
-                                    manner behavior occurred</label
+                                    manner</label
                                   ><label
                                     class="unexpected-behaviors-label off-screen"
                                     aria-hidden="true"
@@ -1062,8 +1064,7 @@ <h3>After 'F'</h3>
                                       type="checkbox"
                                       class="undesirable-2"
                                       value="Screen reader became extremely sluggish" />Screen
-                                    reader became extremely sluggish behavior
-                                    occurred</label
+                                    reader became extremely sluggish</label
                                   ><label
                                     class="unexpected-behaviors-label off-screen"
                                     aria-hidden="true"
@@ -1087,7 +1088,7 @@ <h3>After 'F'</h3>
                                       type="checkbox"
                                       class="undesirable-2"
                                       value="Screen reader crashed" />Screen
-                                    reader crashed behavior occurred</label
+                                    reader crashed</label
                                   ><label
                                     class="unexpected-behaviors-label off-screen"
                                     aria-hidden="true"
@@ -1110,8 +1111,8 @@ <h3>After 'F'</h3>
                                     ><input
                                       type="checkbox"
                                       class="undesirable-2"
-                                      value="Browser crashed" />Browser crashed
-                                    behavior occurred</label
+                                      value="Browser crashed" />Browser
+                                    crashed</label
                                   ><label
                                     class="unexpected-behaviors-label off-screen"
                                     aria-hidden="true"
@@ -1134,8 +1135,7 @@ <h3>After 'F'</h3>
                                     ><input
                                       type="checkbox"
                                       class="undesirable-2"
-                                      value="Other" />Other behavior
-                                    occurred</label
+                                      value="Other" />Other</label
                                   ><label
                                     class="unexpected-behaviors-label off-screen"
                                     aria-hidden="true"
@@ -1179,6 +1179,12 @@ <h3>After 'Tab'</h3>
                               </div>
                               <textarea id="speechoutput-3"></textarea>
                             </div>
+                            <label class="untestable-label"
+                              ><input type="checkbox" />The response to 'Tab'
+                              created conditions that made assertions
+                              untestable, e.g., focused the wrong
+                              element.</label
+                            >
                             <fieldset class="test-renderer-fieldset">
                               <legend id="command-3-assertions-heading">
                                 Which statements are true about the response to
@@ -1236,9 +1242,7 @@ <h3>After 'Tab'</h3>
                             <fieldset
                               class="test-renderer-fieldset"
                               id="cmd-3-problems">
-                              <legend>
-                                Were there additional undesirable behaviors?
-                              </legend>
+                              <legend>Did negative side effects occur?</legend>
                               <div>
                                 <input
                                   type="radio"
@@ -1246,8 +1250,8 @@ <h3>After 'Tab'</h3>
                                   name="problem-3" /><label
                                   id="problem-3-true-label"
                                   for="problem-3-true"
-                                  >No, there were no additional undesirable
-                                  behaviors.</label
+                                  >No, negative side effects did not
+                                  occur.</label
                                 >
                               </div>
                               <div>
@@ -1257,14 +1261,13 @@ <h3>After 'Tab'</h3>
                                   name="problem-3" /><label
                                   id="problem-3-false-label"
                                   for="problem-3-false"
-                                  >Yes, there were additional undesirable
-                                  behaviors</label
+                                  >Yes, negative side effects occured.</label
                                 >
                               </div>
                               <fieldset
                                 class="test-renderer-fieldset problem-select"
                                 hidden="">
-                                <legend>Undesirable behaviors</legend>
+                                <legend>Negative side effects</legend>
                                 <div class="problem-option-container">
                                   <label class="unexpected-behaviors-label"
                                     ><input
@@ -1272,8 +1275,7 @@ <h3>After 'Tab'</h3>
                                       class="undesirable-3"
                                       value="Output is excessively verbose, e.g., includes redundant and/or irrelevant speech" />Output
                                     is excessively verbose, e.g., includes
-                                    redundant and/or irrelevant speech behavior
-                                    occurred</label
+                                    redundant and/or irrelevant speech</label
                                   ><label
                                     class="unexpected-behaviors-label off-screen"
                                     aria-hidden="true"
@@ -1298,7 +1300,7 @@ <h3>After 'Tab'</h3>
                                       class="undesirable-3"
                                       value="Reading cursor position changed in an unexpected manner" />Reading
                                     cursor position changed in an unexpected
-                                    manner behavior occurred</label
+                                    manner</label
                                   ><label
                                     class="unexpected-behaviors-label off-screen"
                                     aria-hidden="true"
@@ -1322,8 +1324,7 @@ <h3>After 'Tab'</h3>
                                       type="checkbox"
                                       class="undesirable-3"
                                       value="Screen reader became extremely sluggish" />Screen
-                                    reader became extremely sluggish behavior
-                                    occurred</label
+                                    reader became extremely sluggish</label
                                   ><label
                                     class="unexpected-behaviors-label off-screen"
                                     aria-hidden="true"
@@ -1347,7 +1348,7 @@ <h3>After 'Tab'</h3>
                                       type="checkbox"
                                       class="undesirable-3"
                                       value="Screen reader crashed" />Screen
-                                    reader crashed behavior occurred</label
+                                    reader crashed</label
                                   ><label
                                     class="unexpected-behaviors-label off-screen"
                                     aria-hidden="true"
@@ -1370,8 +1371,8 @@ <h3>After 'Tab'</h3>
                                     ><input
                                       type="checkbox"
                                       class="undesirable-3"
-                                      value="Browser crashed" />Browser crashed
-                                    behavior occurred</label
+                                      value="Browser crashed" />Browser
+                                    crashed</label
                                   ><label
                                     class="unexpected-behaviors-label off-screen"
                                     aria-hidden="true"
@@ -1394,8 +1395,7 @@ <h3>After 'Tab'</h3>
                                     ><input
                                       type="checkbox"
                                       class="undesirable-3"
-                                      value="Other" />Other behavior
-                                    occurred</label
+                                      value="Other" />Other</label
                                   ><label
                                     class="unexpected-behaviors-label off-screen"
                                     aria-hidden="true"
diff --git a/client/tests/e2e/snapshots/saved/_test-queue.html b/client/tests/e2e/snapshots/saved/_test-queue.html
index b4caadf2e..a40113ed3 100644
--- a/client/tests/e2e/snapshots/saved/_test-queue.html
+++ b/client/tests/e2e/snapshots/saved/_test-queue.html
@@ -240,7 +240,7 @@ <h3 class="disclosure-heading">
                           <label class="disclosure-form-label form-label"
                             >Test Plan</label
                           ><select class="form-select">
-                            <option value="88">
+                            <option value="89">
                               Action Menu Button Example Using
                               aria-activedescendant
                             </option>
@@ -248,9 +248,9 @@ <h3 class="disclosure-heading">
                             <option value="67">
                               Checkbox Example (Mixed-State)
                             </option>
-                            <option value="84">Color Viewer Slider</option>
+                            <option value="85">Color Viewer Slider</option>
                             <option value="68">Command Button Example</option>
-                            <option value="90">Modal Dialog Example</option>
+                            <option value="91">Modal Dialog Example</option>
                             <option value="7">
                               Select Only Combobox Example
                             </option>
@@ -261,7 +261,7 @@ <h3 class="disclosure-heading">
                           <label class="disclosure-form-label form-label"
                             >Test Plan Version</label
                           ><select aria-disabled="false" class="form-select">
-                            <option value="88">
+                            <option value="89">
                               Feb 13, 2025 Menu button test plans: Change
                               priority of assertion stateCollapsed from 1 to 2
                               (pull #1196) (bac64bf)
@@ -617,7 +617,7 @@ <h3 class="disclosure-heading">
                     id="disclosure-btn-controls-horizontal-slider-0"
                     aria-labelledby="disclosure-btn-horizontal-slider-0">
                     <div class="metadata-container">
-                      <a href="/test-review/84"
+                      <a href="/test-review/85"
                         ><svg
                           aria-hidden="true"
                           focusable="false"
@@ -843,7 +843,7 @@ <h3 class="disclosure-heading">
                     id="disclosure-btn-controls-modal-dialog-0"
                     aria-labelledby="disclosure-btn-modal-dialog-0">
                     <div class="metadata-container">
-                      <a href="/test-review/90"
+                      <a href="/test-review/91"
                         ><svg
                           aria-hidden="true"
                           focusable="false"
diff --git a/client/tests/e2e/snapshots/utils.js b/client/tests/e2e/snapshots/utils.js
index c967ec013..c24f0a006 100644
--- a/client/tests/e2e/snapshots/utils.js
+++ b/client/tests/e2e/snapshots/utils.js
@@ -14,7 +14,7 @@ const snapshotRoutes = [
   '/run/2',
   '/data-management/meter',
   '/candidate-test-plan/24/1',
-  '/candidate-test-plan/24/1#summary',
+  '/candidate-test-plan/24/1#summary-assertions',
   '/test-queue/2/conflicts',
   '/report/67/targets/20'
 ];
diff --git a/client/utils/summarizeAssertions.js b/client/utils/summarizeAssertions.js
new file mode 100644
index 000000000..dad993454
--- /dev/null
+++ b/client/utils/summarizeAssertions.js
@@ -0,0 +1,29 @@
+/**
+ * Generate a text-based summary of the assertion verdicts in a given "metrics"
+ * object.
+ *
+ * @param {object} metrics
+ *
+ * @returns {string}
+ */
+export default metrics => {
+  const {
+    assertionsPassedCount,
+    assertionsUntestableCount,
+    mustAssertionsFailedCount,
+    shouldAssertionsFailedCount,
+    mayAssertionsFailedCount
+  } = metrics;
+
+  const mustShouldAssertionsFailedCount =
+    mustAssertionsFailedCount + shouldAssertionsFailedCount;
+
+  return (
+    `${assertionsPassedCount} passed, ` +
+    `${mustShouldAssertionsFailedCount} failed, ` +
+    `${mayAssertionsFailedCount} unsupported` +
+    (assertionsUntestableCount
+      ? `, ${assertionsUntestableCount} untestable`
+      : '')
+  );
+};
diff --git a/server/graphql-schema.js b/server/graphql-schema.js
index 7e6d6195f..90593b4ba 100644
--- a/server/graphql-schema.js
+++ b/server/graphql-schema.js
@@ -802,6 +802,11 @@ const graphqlSchema = gql`
     """
     output: String
     """
+    A tester may designate a scenario as "untestable" if the observed behavior
+    renders the associated assertions incoherent.
+    """
+    untestable: Boolean
+    """
     The outcomes of the assertions based on the output field.
     """
     assertionResults(priority: AssertionPriority): [AssertionResult]!
@@ -835,6 +840,10 @@ const graphqlSchema = gql`
     """
     See ScenarioResult type for more information.
     """
+    untestable: Boolean
+    """
+    See ScenarioResult type for more information.
+    """
     assertionResults: [AssertionResultInput]!
     """
     See ScenarioResult type for more information.
diff --git a/server/resolvers/TestPlanRunOperations/createTestResultSkeleton.js b/server/resolvers/TestPlanRunOperations/createTestResultSkeleton.js
index c6407bbc1..e4413e4cf 100644
--- a/server/resolvers/TestPlanRunOperations/createTestResultSkeleton.js
+++ b/server/resolvers/TestPlanRunOperations/createTestResultSkeleton.js
@@ -49,6 +49,7 @@ const createTestResultSkeleton = ({
           id: scenarioResultId,
           scenarioId: scenario.id,
           output: null,
+          untestable: false,
           assertionResults: test.assertions
             // Filter out assertionResults for the current scenario which were marked
             // with a 0-priority exception
diff --git a/server/resolvers/helpers/processCopiedReports.js b/server/resolvers/helpers/processCopiedReports.js
index d7072c688..8ac356898 100644
--- a/server/resolvers/helpers/processCopiedReports.js
+++ b/server/resolvers/helpers/processCopiedReports.js
@@ -436,6 +436,7 @@ const processCopiedReports = async ({
           }
 
           eachScenarioResult.output = oldScenarioResult.output;
+          eachScenarioResult.untestable = oldScenarioResult.untestable;
           eachScenarioResult.unexpectedBehaviors =
             oldScenarioResult.unexpectedBehaviors;
 
diff --git a/server/resources/commandsV2.json b/server/resources/commandsV2.json
index 4b15357be..6a4cf5419 100644
--- a/server/resources/commandsV2.json
+++ b/server/resources/commandsV2.json
@@ -1,107 +1,117 @@
 {
-    "modifiers.alt": "Alt",
-    "modifiers.opt": "Option",
-    "modifiers.shift": "Shift",
-    "modifiers.ctrl": "Control",
-    "modifiers.cmd": "Command",
-    "modifiers.win": "Windows",
-    "modifiers.ins": "Insert",
-    "modifierAliases.jaws": "ins",
-    "modifierAliases.nvda": "ins",
-    "modifierAliases.vo": "ctrl+opt",
-    "keys.0": "0",
-    "keys.1": "1",
-    "keys.2": "2",
-    "keys.3": "3",
-    "keys.4": "4",
-    "keys.5": "5",
-    "keys.6": "6",
-    "keys.7": "7",
-    "keys.8": "8",
-    "keys.9": "9",
-    "keys.a": "a",
-    "keys.b": "b",
-    "keys.c": "c",
-    "keys.d": "d",
-    "keys.e": "e",
-    "keys.f": "f",
-    "keys.g": "g",
-    "keys.h": "h",
-    "keys.i": "i",
-    "keys.j": "j",
-    "keys.k": "k",
-    "keys.l": "l",
-    "keys.m": "m",
-    "keys.n": "n",
-    "keys.o": "o",
-    "keys.p": "p",
-    "keys.q": "q",
-    "keys.r": "r",
-    "keys.s": "s",
-    "keys.t": "t",
-    "keys.u": "u",
-    "keys.v": "v",
-    "keys.w": "w",
-    "keys.x": "x",
-    "keys.y": "y",
-    "keys.z": "z",
-    "keys.dash": "Dash",
-    "keys.equals": "Equals",
-    "keys.grave": "Grave",
-    "keys.leftBracket": "Left Bracket",
-    "keys.rightBracket": "Right Bracket",
-    "keys.backslash": "Backslash",
-    "keys.semicolon": "Semicolon",
-    "keys.apostrophe": "Apostrophe",
-    "keys.comma": "Comma",
-    "keys.period": "Period",
-    "keys.slash": "Slash",
-    "keys.esc": "Escape",
-    "keys.backspace": "Backspace",
-    "keys.tab": "Tab",
-    "keys.capsLock": "Caps Lock",
-    "keys.enter": "Enter",
-    "keys.space": "Space",
-    "keys.f1": "F1",
-    "keys.f2": "F2",
-    "keys.f3": "F3",
-    "keys.f4": "F4",
-    "keys.f5": "F5",
-    "keys.f6": "F6",
-    "keys.f7": "F7",
-    "keys.f8": "F8",
-    "keys.f9": "F9",
-    "keys.f10": "F10",
-    "keys.f11": "F11",
-    "keys.f12": "F12",
-    "keys.scrollLock": "Scroll Lock",
-    "keys.pause": "Pause",
-    "keys.home": "Home",
-    "keys.end": "End",
-    "keys.pageUp": "Page Up",
-    "keys.pageDown": "Page Down",
-    "keys.del": "Delete",
-    "keys.left": "Left Arrow",
-    "keys.right": "Right Arrow",
-    "keys.up": "Up Arrow",
-    "keys.down": "Down Arrow",
-    "keys.numLock": "Num Lock",
-    "keys.numpadSlash": "Numpad Slash",
-    "keys.numpadAsterisk": "Numpad Asterisk",
-    "keys.numpadMinus": "Numpad Minus",
-    "keys.numpadPlus": "Numpad Plus",
-    "keys.numpadEnter": "Numpad Enter",
-    "keys.numpad1": "Numpad 1",
-    "keys.numpad2": "Numpad 2",
-    "keys.numpad3": "Numpad 3",
-    "keys.numpad4": "Numpad 4",
-    "keys.numpad5": "Numpad 5",
-    "keys.numpad6": "Numpad 6",
-    "keys.numpad7": "Numpad 7",
-    "keys.numpad8": "Numpad 8",
-    "keys.numpad9": "Numpad 9",
-    "keys.numpad0": "Numpad 0",
-    "keys.numpadPeriod": "Numpad Period",
-    "keyAliases.delete": "del",
-    "keyAliases.escape": "esc"
-}
\ No newline at end of file
+  "modifiers.alt": "Alt",
+  "modifiers.opt": "Option",
+  "modifiers.shift": "Shift",
+  "modifiers.ctrl": "Control",
+  "modifiers.cmd": "Command",
+  "modifiers.win": "Windows",
+  "modifiers.ins": "Insert",
+  "modifierAliases.jaws": "ins",
+  "modifierAliases.nvda": "ins",
+  "modifierAliases.vo": "ctrl+opt",
+  "keys.0": "0",
+  "keys.1": "1",
+  "keys.2": "2",
+  "keys.3": "3",
+  "keys.4": "4",
+  "keys.5": "5",
+  "keys.6": "6",
+  "keys.7": "7",
+  "keys.8": "8",
+  "keys.9": "9",
+  "keys.a": "a",
+  "keys.b": "b",
+  "keys.c": "c",
+  "keys.d": "d",
+  "keys.e": "e",
+  "keys.f": "f",
+  "keys.g": "g",
+  "keys.h": "h",
+  "keys.i": "i",
+  "keys.j": "j",
+  "keys.k": "k",
+  "keys.l": "l",
+  "keys.m": "m",
+  "keys.n": "n",
+  "keys.o": "o",
+  "keys.p": "p",
+  "keys.q": "q",
+  "keys.r": "r",
+  "keys.s": "s",
+  "keys.t": "t",
+  "keys.u": "u",
+  "keys.v": "v",
+  "keys.w": "w",
+  "keys.x": "x",
+  "keys.y": "y",
+  "keys.z": "z",
+  "keys.one": "1",
+  "keys.two": "2",
+  "keys.three": "3",
+  "keys.four": "4",
+  "keys.five": "5",
+  "keys.six": "6",
+  "keys.seven": "7",
+  "keys.eight": "8",
+  "keys.nine": "9",
+  "keys.cero": "0",
+  "keys.dash": "Dash",
+  "keys.equals": "Equals",
+  "keys.grave": "Grave",
+  "keys.leftBracket": "Left Bracket",
+  "keys.rightBracket": "Right Bracket",
+  "keys.backslash": "Backslash",
+  "keys.semicolon": "Semicolon",
+  "keys.apostrophe": "Apostrophe",
+  "keys.comma": "Comma",
+  "keys.period": "Period",
+  "keys.slash": "Slash",
+  "keys.esc": "Escape",
+  "keys.backspace": "Backspace",
+  "keys.tab": "Tab",
+  "keys.capsLock": "Caps Lock",
+  "keys.enter": "Enter",
+  "keys.space": "Space",
+  "keys.f1": "F1",
+  "keys.f2": "F2",
+  "keys.f3": "F3",
+  "keys.f4": "F4",
+  "keys.f5": "F5",
+  "keys.f6": "F6",
+  "keys.f7": "F7",
+  "keys.f8": "F8",
+  "keys.f9": "F9",
+  "keys.f10": "F10",
+  "keys.f11": "F11",
+  "keys.f12": "F12",
+  "keys.scrollLock": "Scroll Lock",
+  "keys.pause": "Pause",
+  "keys.home": "Home",
+  "keys.end": "End",
+  "keys.pageUp": "Page Up",
+  "keys.pageDown": "Page Down",
+  "keys.del": "Delete",
+  "keys.left": "Left Arrow",
+  "keys.right": "Right Arrow",
+  "keys.up": "Up Arrow",
+  "keys.down": "Down Arrow",
+  "keys.numLock": "Num Lock",
+  "keys.numpadSlash": "Numpad Slash",
+  "keys.numpadAsterisk": "Numpad Asterisk",
+  "keys.numpadMinus": "Numpad Minus",
+  "keys.numpadPlus": "Numpad Plus",
+  "keys.numpadEnter": "Numpad Enter",
+  "keys.numpad1": "Numpad 1",
+  "keys.numpad2": "Numpad 2",
+  "keys.numpad3": "Numpad 3",
+  "keys.numpad4": "Numpad 4",
+  "keys.numpad5": "Numpad 5",
+  "keys.numpad6": "Numpad 6",
+  "keys.numpad7": "Numpad 7",
+  "keys.numpad8": "Numpad 8",
+  "keys.numpad9": "Numpad 9",
+  "keys.numpad0": "Numpad 0",
+  "keys.numpadPeriod": "Numpad Period",
+  "keyAliases.delete": "del",
+  "keyAliases.escape": "esc"
+}
diff --git a/server/tests/integration/graphql.test.js b/server/tests/integration/graphql.test.js
index 38562b378..ca8b790b7 100644
--- a/server/tests/integration/graphql.test.js
+++ b/server/tests/integration/graphql.test.js
@@ -534,6 +534,7 @@ describe('graphql', () => {
                   }
                   output
                   hasUnexpected
+                  untestable
                   assertionResults {
                     __typename
                     id
@@ -1038,6 +1039,7 @@ const getMutationInputs = async () => {
           id
           output
           hasUnexpected
+          untestable
           assertionResults {
             id
             passed
@@ -1093,6 +1095,7 @@ const getMutationInputs = async () => {
         ...scenarioResult,
         output: 'sample output',
         hasUnexpected: 'doesNotHaveUnexpected',
+        untestable: false,
         assertionResults: scenarioResult.assertionResults.map(
           assertionResult => ({
             ...assertionResult,
diff --git a/shared/getMetrics.js b/shared/getMetrics.js
index f101a14f0..02348e5a7 100644
--- a/shared/getMetrics.js
+++ b/shared/getMetrics.js
@@ -56,7 +56,7 @@ const countAssertions = ({
   testResult, // Choose one to provide
   scenarioResult, // Choose one to provide
   priority,
-  passedOnly
+  status
 }) => {
   const countScenarioResult = scenarioResult => {
     const isClient =
@@ -92,7 +92,18 @@ const countAssertions = ({
         );
       });
     }
-    if (passedOnly) return all.filter(each => each.passed).length;
+
+    if (status === 'untestable') {
+      return scenarioResult.untestable ? all.length : 0;
+    }
+
+    if (status === 'passed') {
+      // In an untestable scenario, no assertions are considered passing.
+      return scenarioResult.untestable
+        ? 0
+        : all.filter(each => each.passed).length;
+    }
+
     return all.length;
   };
   return countAvailableData(countScenarioResult, {
@@ -156,15 +167,26 @@ const calculateAssertionPriorityCounts = (result, priority) => {
   const assertionsPassedCount = countAssertions({
     ...result,
     priority,
-    passedOnly: true
+    status: 'passed'
+  });
+  const assertionsUntestableCount = countAssertions({
+    ...result,
+    priority,
+    status: 'untestable'
   });
   const assertionsCount = countAssertions({
     ...result,
     priority
   });
-  const assertionsFailedCount = assertionsCount - assertionsPassedCount;
+  const assertionsFailedCount =
+    assertionsCount - assertionsPassedCount - assertionsUntestableCount;
 
-  return { assertionsCount, assertionsPassedCount, assertionsFailedCount };
+  return {
+    assertionsCount,
+    assertionsPassedCount,
+    assertionsFailedCount,
+    assertionsUntestableCount
+  };
 };
 
 const getMetrics = ({
@@ -177,8 +199,8 @@ const getMetrics = ({
   const commandsCount = countCommands({ ...result });
 
   // NOTE: Each command has 2 additional assertions:
-  // * Other behaviors that create severe negative impact
-  // * Other behaviors that create moderate negative impact
+  // * Severe negative side effects do not occur
+  // * Moderate negative side effects do not occur
   // TODO: Include this from the db assertions now that this has been agreed upon
   const severeImpactFailedAssertionCount = countUnexpectedBehaviorsImpact(
     { ...result },
@@ -197,7 +219,8 @@ const getMetrics = ({
   let {
     assertionsCount: mustAssertionsCount,
     assertionsPassedCount: mustAssertionsPassedCount,
-    assertionsFailedCount: mustAssertionsFailedCount
+    assertionsFailedCount: mustAssertionsFailedCount,
+    assertionsUntestableCount: mustAssertionsUntestableCount
   } = calculateAssertionPriorityCounts(result, 'MUST');
   mustAssertionsCount += commandsCount;
   mustAssertionsPassedCount += severeImpactPassedAssertionCount;
@@ -206,7 +229,8 @@ const getMetrics = ({
   let {
     assertionsCount: shouldAssertionsCount,
     assertionsPassedCount: shouldAssertionsPassedCount,
-    assertionsFailedCount: shouldAssertionsFailedCount
+    assertionsFailedCount: shouldAssertionsFailedCount,
+    assertionsUntestableCount: shouldAssertionsUntestableCount
   } = calculateAssertionPriorityCounts(result, 'SHOULD');
   shouldAssertionsCount += commandsCount;
   shouldAssertionsPassedCount += moderateImpactPassedAssertionCount;
@@ -215,7 +239,8 @@ const getMetrics = ({
   const {
     assertionsCount: mayAssertionsCount,
     assertionsPassedCount: mayAssertionsPassedCount,
-    assertionsFailedCount: mayAssertionsFailedCount
+    assertionsFailedCount: mayAssertionsFailedCount,
+    assertionsUntestableCount: mayAssertionsUntestableCount
   } = calculateAssertionPriorityCounts(result, 'MAY');
 
   const testsPassedCount = countTests({
@@ -249,9 +274,14 @@ const getMetrics = ({
     supportLevel = 'FULL';
   }
 
+  // Completely ignore untestable assertions in calculating the support
+  // percentage.
   const percentage = calculatePercentage(
     mustAssertionsPassedCount + shouldAssertionsPassedCount,
-    mustAssertionsCount + shouldAssertionsCount
+    mustAssertionsCount +
+      shouldAssertionsCount -
+      mustAssertionsUntestableCount -
+      shouldAssertionsUntestableCount
   );
   const supportPercent = trimDecimals(percentage);
 
@@ -265,18 +295,27 @@ const getMetrics = ({
     shouldAssertionsFailedCount +
     mayAssertionsFailedCount;
 
+  const assertionsUntestableCount =
+    mustAssertionsUntestableCount +
+    shouldAssertionsUntestableCount +
+    mayAssertionsUntestableCount;
+
   return {
     assertionsPassedCount,
     assertionsFailedCount,
+    assertionsUntestableCount,
     mustAssertionsPassedCount,
     mustAssertionsCount,
     mustAssertionsFailedCount,
+    mustAssertionsUntestableCount,
     shouldAssertionsPassedCount,
     shouldAssertionsCount,
     shouldAssertionsFailedCount,
+    shouldAssertionsUntestableCount,
     mayAssertionsPassedCount,
     mayAssertionsCount,
     mayAssertionsFailedCount,
+    mayAssertionsUntestableCount,
     testsPassedCount,
     testsCount,
     testsFailedCount,
diff --git a/shared/tests/getMetrics.test.js b/shared/tests/getMetrics.test.js
index 3b4def008..5e29087b5 100644
--- a/shared/tests/getMetrics.test.js
+++ b/shared/tests/getMetrics.test.js
@@ -22,12 +22,13 @@ function generateTestPlanReport(reportSpec) {
       return {
         id: id(),
         scenarioResults: testSpec.map(scenarioSpec => {
-          const { must, should, may, unexpected } = scenarioSpec;
+          const { must, should, may, untestable, unexpected } = scenarioSpec;
           return {
             id: id(),
             scenario: {
               commands: [{ id: 's' }]
             },
+            untestable,
             assertionResults: [...must, ...should, ...may].map(boolToAssertion),
             mustAssertionResults: must.map(boolToAssertion),
             shouldAssertionResults: should.map(boolToAssertion),
@@ -265,15 +266,19 @@ describe('getMetrics', () => {
           mustAssertionsFailedCount +
           shouldAssertionsFailedCount +
           mayAssertionsFailedCount,
+        assertionsUntestableCount: 0,
         mustAssertionsPassedCount,
         mustAssertionsCount,
         mustAssertionsFailedCount,
+        mustAssertionsUntestableCount: 0,
         shouldAssertionsPassedCount,
         shouldAssertionsCount,
         shouldAssertionsFailedCount,
+        shouldAssertionsUntestableCount: 0,
         mayAssertionsPassedCount,
         mayAssertionsCount,
         mayAssertionsFailedCount,
+        mayAssertionsUntestableCount: 0,
         testsPassedCount,
         testsCount,
         testsFailedCount,
@@ -322,14 +327,18 @@ describe('getMetrics', () => {
         mustAssertionsCount: 56,
         assertionsFailedCount: 37,
         assertionsPassedCount: 63,
+        assertionsUntestableCount: 0,
         shouldAssertionsCount: 36,
         unexpectedBehaviorCount: 7,
         mayAssertionsFailedCount: 6,
         mayAssertionsPassedCount: 2,
+        mayAssertionsUntestableCount: 0,
         mustAssertionsFailedCount: 15,
         mustAssertionsPassedCount: 41,
+        mustAssertionsUntestableCount: 0,
         shouldAssertionsFailedCount: 16,
         shouldAssertionsPassedCount: 20,
+        shouldAssertionsUntestableCount: 0,
         unexpectedBehaviorsFormatted: '7 found',
         severeImpactFailedAssertionCount: 7,
         severeImpactPassedAssertionCount: 13,
@@ -348,15 +357,19 @@ describe('getMetrics', () => {
     expect(getMetrics({ scenarioResult })).toEqual({
       assertionsPassedCount: 4,
       assertionsFailedCount: 0,
+      assertionsUntestableCount: 0,
       mustAssertionsPassedCount: 2,
       mustAssertionsCount: 2,
       mustAssertionsFailedCount: 0,
+      mustAssertionsUntestableCount: 0,
       shouldAssertionsPassedCount: 1,
       shouldAssertionsCount: 1,
       shouldAssertionsFailedCount: 0,
+      shouldAssertionsUntestableCount: 0,
       mayAssertionsPassedCount: 1,
       mayAssertionsCount: 1,
       mayAssertionsFailedCount: 0,
+      mayAssertionsUntestableCount: 0,
       testsPassedCount: 1,
       testsCount: 1,
       testsFailedCount: 0,
@@ -384,15 +397,19 @@ describe('getMetrics', () => {
     expect(getMetrics({ testPlanReport })).toEqual({
       assertionsPassedCount: 13,
       assertionsFailedCount: 4,
+      assertionsUntestableCount: 0,
       mustAssertionsPassedCount: 5,
       mustAssertionsCount: 7,
       mustAssertionsFailedCount: 2,
+      mustAssertionsUntestableCount: 0,
       shouldAssertionsPassedCount: 6,
       shouldAssertionsCount: 7,
       shouldAssertionsFailedCount: 1,
+      shouldAssertionsUntestableCount: 0,
       mayAssertionsPassedCount: 2,
       mayAssertionsCount: 3,
       mayAssertionsFailedCount: 1,
+      mayAssertionsUntestableCount: 0,
       testsPassedCount: 1,
       testsCount: 3,
       testsFailedCount: 2,
@@ -420,15 +437,19 @@ describe('getMetrics', () => {
     expect(getMetrics({ testPlanReport })).toEqual({
       assertionsPassedCount: 12,
       assertionsFailedCount: 5,
+      assertionsUntestableCount: 0,
       mustAssertionsPassedCount: 4,
       mustAssertionsCount: 7,
       mustAssertionsFailedCount: 3,
+      mustAssertionsUntestableCount: 0,
       shouldAssertionsPassedCount: 6,
       shouldAssertionsCount: 7,
       shouldAssertionsFailedCount: 1,
+      shouldAssertionsUntestableCount: 0,
       mayAssertionsPassedCount: 2,
       mayAssertionsCount: 3,
       mayAssertionsFailedCount: 1,
+      mayAssertionsUntestableCount: 0,
       testsPassedCount: 0,
       testsCount: 3,
       testsFailedCount: 3,
@@ -463,15 +484,19 @@ describe('getMetrics', () => {
     expect(getMetrics({ testPlanReport })).toEqual({
       assertionsPassedCount: 11,
       assertionsFailedCount: 6,
+      assertionsUntestableCount: 0,
       mustAssertionsPassedCount: 4,
       mustAssertionsCount: 7,
       mustAssertionsFailedCount: 3,
+      mustAssertionsUntestableCount: 0,
       shouldAssertionsPassedCount: 5,
       shouldAssertionsCount: 7,
       shouldAssertionsFailedCount: 2,
+      shouldAssertionsUntestableCount: 0,
       mayAssertionsPassedCount: 2,
       mayAssertionsCount: 3,
       mayAssertionsFailedCount: 1,
+      mayAssertionsUntestableCount: 0,
       testsPassedCount: 0,
       testsCount: 3,
       testsFailedCount: 3,
@@ -489,4 +514,52 @@ describe('getMetrics', () => {
       supportPercent: 64
     });
   });
+
+  it('returns expected metrics object for failing testPlanReport with untestable scenario', () => {
+    const testPlanReport = generateTestPlanReport([
+      [
+        {
+          must: [true],
+          should: [true],
+          may: [true],
+          untestable: true,
+          unexpected: ['SEVERE']
+        }
+      ],
+      [{ must: [true, false], should: [true], may: [true], unexpected: [] }],
+      [{ must: [false], should: [true, false], may: [false], unexpected: [] }]
+    ]);
+    expect(getMetrics({ testPlanReport })).toEqual({
+      assertionsPassedCount: 9,
+      assertionsFailedCount: 5,
+      assertionsUntestableCount: 3,
+      mustAssertionsPassedCount: 3,
+      mustAssertionsCount: 7,
+      mustAssertionsFailedCount: 3,
+      mustAssertionsUntestableCount: 1,
+      shouldAssertionsPassedCount: 5,
+      shouldAssertionsCount: 7,
+      shouldAssertionsFailedCount: 1,
+      shouldAssertionsUntestableCount: 1,
+      mayAssertionsPassedCount: 1,
+      mayAssertionsCount: 3,
+      mayAssertionsFailedCount: 1,
+      mayAssertionsUntestableCount: 1,
+      testsPassedCount: 0,
+      testsCount: 3,
+      testsFailedCount: 3,
+      unexpectedBehaviorCount: 1,
+      severeImpactPassedAssertionCount: 2,
+      severeImpactFailedAssertionCount: 1,
+      moderateImpactPassedAssertionCount: 3,
+      moderateImpactFailedAssertionCount: 0,
+      commandsCount: 3,
+      mustFormatted: '3 of 7 passed',
+      shouldFormatted: '5 of 7 passed',
+      mayFormatted: '1 of 3 supported',
+      unexpectedBehaviorsFormatted: '1 found',
+      supportLevel: 'FAILING',
+      supportPercent: 66
+    });
+  });
 });