diff --git a/packages/@lwc/integration-not-karma/configs/plugins/serve-integration.js b/packages/@lwc/integration-not-karma/configs/plugins/serve-integration.js
index 6774e54d7d..491b2fe688 100644
--- a/packages/@lwc/integration-not-karma/configs/plugins/serve-integration.js
+++ b/packages/@lwc/integration-not-karma/configs/plugins/serve-integration.js
@@ -118,6 +118,11 @@ export default {
     async serve(ctx) {
         if (ctx.path.endsWith('.spec.js')) {
             return await transform(ctx);
+        } else if (ctx.path === '/test_api_sanitizeAttribute') {
+            // The test in /test/api/sanitizeAttribute makes network requests
+            // The returned value doesn't matter; this is just to avoid
+            // unnecessary logging output
+            return '';
         }
     },
 };
diff --git a/packages/@lwc/integration-not-karma/test/api/sanitizeAttribute/index.spec.js b/packages/@lwc/integration-not-karma/test/api/sanitizeAttribute/index.spec.js
index 7062413c7f..2a1c4ae9db 100644
--- a/packages/@lwc/integration-not-karma/test/api/sanitizeAttribute/index.spec.js
+++ b/packages/@lwc/integration-not-karma/test/api/sanitizeAttribute/index.spec.js
@@ -1,3 +1,7 @@
+/**
+ * The URLs used in test are handled by the `serve` method defined in `serve-integration.js`.
+ * What they serve doesn't matter, it's just to avoid a 404 warning logged to console
+ */
 import {
     createElement,
     // Spy is created in a mock file and injected with the import map plugin
@@ -49,7 +53,7 @@ scenarios.forEach(({ type, attrName, tagName, Ctor }) => {
             document.body.appendChild(elm);
 
             const use = elm.shadowRoot.querySelector('use');
-            expect(use.getAttribute(attrName)).toBe('/foo');
+            expect(use.getAttribute(attrName)).toBe('/test_api_sanitizeAttribute?foo');
         });
 
         it('receives the right parameters', () => {
@@ -60,18 +64,18 @@ scenarios.forEach(({ type, attrName, tagName, Ctor }) => {
                 'use',
                 'http://www.w3.org/2000/svg',
                 attrName,
-                '/foo'
+                '/test_api_sanitizeAttribute?foo'
             );
         });
 
         it('replace the original attribute value with a string', () => {
-            sanitizeAttributeSpy.mockReturnValue('/bar');
+            sanitizeAttributeSpy.mockReturnValue('/test_api_sanitizeAttribute?bar');
 
             const elm = createElement(tagName, { is: Ctor });
             document.body.appendChild(elm);
 
             const use = elm.shadowRoot.querySelector('use');
-            expect(use.getAttribute(attrName)).toBe('/bar');
+            expect(use.getAttribute(attrName)).toBe('/test_api_sanitizeAttribute?bar');
         });
 
         it('replace the original attribute value with undefined', () => {
diff --git a/packages/@lwc/integration-not-karma/test/api/sanitizeAttribute/x/hrefDynamic/hrefDynamic.js b/packages/@lwc/integration-not-karma/test/api/sanitizeAttribute/x/hrefDynamic/hrefDynamic.js
index 04a97edd92..99a03f5d47 100644
--- a/packages/@lwc/integration-not-karma/test/api/sanitizeAttribute/x/hrefDynamic/hrefDynamic.js
+++ b/packages/@lwc/integration-not-karma/test/api/sanitizeAttribute/x/hrefDynamic/hrefDynamic.js
@@ -1,5 +1,5 @@
 import { LightningElement } from 'lwc';
 
 export default class extends LightningElement {
-    href = '/foo';
+    href = '/test_api_sanitizeAttribute?foo';
 }
diff --git a/packages/@lwc/integration-not-karma/test/api/sanitizeAttribute/x/hrefStatic/hrefStatic.html b/packages/@lwc/integration-not-karma/test/api/sanitizeAttribute/x/hrefStatic/hrefStatic.html
index 8434f1f799..3262f0704c 100644
--- a/packages/@lwc/integration-not-karma/test/api/sanitizeAttribute/x/hrefStatic/hrefStatic.html
+++ b/packages/@lwc/integration-not-karma/test/api/sanitizeAttribute/x/hrefStatic/hrefStatic.html
@@ -1,5 +1,5 @@
 <template>
     <svg>
-        <use href="/foo"></use>
+        <use href="/test_api_sanitizeAttribute?foo"></use>
     </svg>
 </template>
diff --git a/packages/@lwc/integration-not-karma/test/api/sanitizeAttribute/x/xlinkDynamic/xlinkDynamic.js b/packages/@lwc/integration-not-karma/test/api/sanitizeAttribute/x/xlinkDynamic/xlinkDynamic.js
index 04a97edd92..99a03f5d47 100644
--- a/packages/@lwc/integration-not-karma/test/api/sanitizeAttribute/x/xlinkDynamic/xlinkDynamic.js
+++ b/packages/@lwc/integration-not-karma/test/api/sanitizeAttribute/x/xlinkDynamic/xlinkDynamic.js
@@ -1,5 +1,5 @@
 import { LightningElement } from 'lwc';
 
 export default class extends LightningElement {
-    href = '/foo';
+    href = '/test_api_sanitizeAttribute?foo';
 }
diff --git a/packages/@lwc/integration-not-karma/test/api/sanitizeAttribute/x/xlinkStatic/xlinkStatic.html b/packages/@lwc/integration-not-karma/test/api/sanitizeAttribute/x/xlinkStatic/xlinkStatic.html
index 5774b665c3..514618b6a4 100644
--- a/packages/@lwc/integration-not-karma/test/api/sanitizeAttribute/x/xlinkStatic/xlinkStatic.html
+++ b/packages/@lwc/integration-not-karma/test/api/sanitizeAttribute/x/xlinkStatic/xlinkStatic.html
@@ -1,5 +1,5 @@
 <template>
     <svg>
-        <use xlink:href="/foo"></use>
+        <use xlink:href="/test_api_sanitizeAttribute?foo"></use>
     </svg>
 </template>