diff --git a/src/core/plugins/json-schema-5-samples/fn/index.js b/src/core/plugins/json-schema-5-samples/fn/index.js
index e1fcf8623fe..490057bec56 100644
--- a/src/core/plugins/json-schema-5-samples/fn/index.js
+++ b/src/core/plugins/json-schema-5-samples/fn/index.js
@@ -19,6 +19,7 @@ const primitives = {
   "string_email": () => "user@example.com",
   "string_date-time": () => new Date().toISOString(),
   "string_date": () => new Date().toISOString().substring(0, 10),
+  "string_time": () => new Date().toISOString().substring(11, 23),
   "string_uuid": () => "3fa85f64-5717-4562-b3fc-2c963f66afa6",
   "string_hostname": () => "example.com",
   "string_ipv4": () => "198.51.100.42",
diff --git a/test/unit/core/plugins/json-schema-5-samples/fn/index.js b/test/unit/core/plugins/json-schema-5-samples/fn/index.js
index d3b6ea15c47..08bf2269691 100644
--- a/test/unit/core/plugins/json-schema-5-samples/fn/index.js
+++ b/test/unit/core/plugins/json-schema-5-samples/fn/index.js
@@ -8,6 +8,22 @@ import {
 } from "core/plugins/json-schema-5-samples/fn/index"
 
 describe("sampleFromSchema", () => {
+  const oriDate = Date
+
+  beforeEach(() => {
+    // eslint-disable-next-line no-global-assign
+    Date = function () {
+      this.toISOString = function () {
+        return "2025-04-18T09:13:28.927Z"
+      }
+    }
+  })
+
+  afterEach(() => {
+    // eslint-disable-next-line no-global-assign
+    Date = oriDate
+  })
+
   it("handles Immutable.js objects for nested schemas", function () {
     let definition = fromJS({
       "type": "object",
@@ -341,12 +357,9 @@ describe("sampleFromSchema", () => {
       format: "date-time"
     }
 
-    // 0-20 chops off milliseconds
-    // necessary because test latency can cause failures
-    // it would be better to mock Date globally and expect a string - KS 11/18
-    let expected = new Date().toISOString().substring(0, 20)
+    let expected = "2025-04-18T09:13:28.927Z"
 
-    expect(sampleFromSchema(definition)).toContain(expected)
+    expect(sampleFromSchema(definition)).toEqual(expected)
   })
 
   it("returns example value for date property", () => {
@@ -355,7 +368,18 @@ describe("sampleFromSchema", () => {
       format: "date"
     }
 
-    let expected = new Date().toISOString().substring(0, 10)
+    let expected = "2025-04-18"
+
+    expect(sampleFromSchema(definition)).toEqual(expected)
+  })
+
+  it("returns example value for time property", () => {
+    let definition = {
+      type: "string",
+      format: "time"
+    }
+
+    let expected = "09:13:28.927"
 
     expect(sampleFromSchema(definition)).toEqual(expected)
   })