diff --git a/libraries/eslint-plugin/package.json b/libraries/eslint-plugin/package.json
index 775f3e6e37..ecafc779e0 100644
--- a/libraries/eslint-plugin/package.json
+++ b/libraries/eslint-plugin/package.json
@@ -9,12 +9,19 @@
   },
   "devDependencies": {
     "@eslint/json": "^2.0.0",
-    "@typescript-eslint/parser": "^8.59.4"
+    "@typescript-eslint/parser": "^8.59.4",
+    "typescript": "^5.0.4",
+    "vitest": "4.1.5"
   },
   "peerDependencies": {
     "eslint": "^10.4.0"
   },
   "scripts": {
-    "test": "node rules.test.js"
+    "test": "yarn run lint && yarn run types:check && yarn run test:unit",
+    "lint": "eslint --cache --cache-location ../../.cache/eslint/ --ext .cjs,.js,.jsx,.mjs,.ts --max-warnings 0 --format unix .",
+    "lint:fix": "eslint --cache --cache-location ../../.cache/eslint/ --fix --ext .cjs,.js,.jsx,.mjs,.ts .",
+    "test:ci": "yarn run test:unit",
+    "test:unit": "vitest --config vitest.config.ts",
+    "types:check": "tsc --noEmit"
   }
 }
diff --git a/libraries/eslint-plugin/prefer-kebab-url.js b/libraries/eslint-plugin/prefer-kebab-url.js
index 9c7b834dca..ab4c203b26 100644
--- a/libraries/eslint-plugin/prefer-kebab-url.js
+++ b/libraries/eslint-plugin/prefer-kebab-url.js
@@ -29,7 +29,7 @@ const getSuggestion = routePath => {
 
   if (routePath instanceof RegExp) {
     const words = removeTextBetweenBrackets(routePath.source).match(/[\w-]+/g)
-    if (!words) return routePath
+    if (!words) return null
 
     let newSource = routePath.source
     for (const word of words) {
@@ -42,9 +42,7 @@ const getSuggestion = routePath => {
     }
 
     const kebabed = new RegExp(newSource, routePath.flags)
-    return kebabed.source.toString() === routePath.source.toString()
-      ? null
-      : kebabed
+    return kebabed.source === routePath.source ? null : kebabed.toString()
   }
 }
 
diff --git a/libraries/eslint-plugin/test/setup.js b/libraries/eslint-plugin/test/setup.js
new file mode 100644
index 0000000000..ed2eaf4fe6
--- /dev/null
+++ b/libraries/eslint-plugin/test/setup.js
@@ -0,0 +1,9 @@
+import { afterAll, describe, it } from 'vitest'
+import { RuleTester } from 'eslint'
+
+// ESLint's RuleTester discovers the test framework via these hooks. The repo's
+// vitest configs deliberately avoid `globals: true`, so wire them explicitly.
+RuleTester.afterAll = afterAll
+RuleTester.describe = describe
+RuleTester.it = it
+RuleTester.itOnly = it.only
diff --git a/libraries/eslint-plugin/rules.test.js b/libraries/eslint-plugin/test/unit/rules.test.js
similarity index 89%
rename from libraries/eslint-plugin/rules.test.js
rename to libraries/eslint-plugin/test/unit/rules.test.js
index 02178362be..0d1158ffa5 100644
--- a/libraries/eslint-plugin/rules.test.js
+++ b/libraries/eslint-plugin/test/unit/rules.test.js
@@ -1,18 +1,21 @@
-const { RuleTester } = require('eslint')
-const tsParser = require('@typescript-eslint/parser')
-const json = require('@eslint/json').default
-const noThrowInCallback = require('./no-throw-in-callback')
-const preferKebabUrl = require('./prefer-kebab-url')
-const noUnnecessaryTrans = require('./no-unnecessary-trans')
-const shouldUnescapeTrans = require('./should-unescape-trans')
-const noGeneratedEditorThemes = require('./no-generated-editor-themes')
-const viDoMockValidPath = require('./require-vi-doMock-valid-path')
-const requireCioSnakeCaseProperties = require('./require-cio-snake-case-properties')
-const requireRelForDocsLinks = require('./require-rel-for-docs-links')
-const noConsecutiveSpacesInLocales = require('./no-consecutive-spaces-in-locales')
-const noStraightApostrophesInLocales = require('./no-straight-apostrophes-in-locales')
-const frenchTypographyInLocales = require('./french-typography-in-locales')
-const sortedKeysInLocales = require('./sorted-keys-in-locales')
+import { fileURLToPath } from 'node:url'
+import { RuleTester } from 'eslint'
+import tsParser from '@typescript-eslint/parser'
+import json from '@eslint/json'
+import noThrowInCallback from '../../no-throw-in-callback.js'
+import preferKebabUrl from '../../prefer-kebab-url.js'
+import noUnnecessaryTrans from '../../no-unnecessary-trans.js'
+import shouldUnescapeTrans from '../../should-unescape-trans.js'
+import noGeneratedEditorThemes from '../../no-generated-editor-themes.js'
+import viDoMockValidPath from '../../require-vi-doMock-valid-path.js'
+import requireCioSnakeCaseProperties from '../../require-cio-snake-case-properties.js'
+import requireRelForDocsLinks from '../../require-rel-for-docs-links.js'
+import noConsecutiveSpacesInLocales from '../../no-consecutive-spaces-in-locales.js'
+import noStraightApostrophesInLocales from '../../no-straight-apostrophes-in-locales.js'
+import frenchTypographyInLocales from '../../french-typography-in-locales.js'
+import sortedKeysInLocales from '../../sorted-keys-in-locales.js'
+
+const __filename = fileURLToPath(import.meta.url)
 
 const ruleTester = new RuleTester({
   languageOptions: {
@@ -64,7 +67,15 @@ ruleTester.run('prefer-kebab-url', preferKebabUrl, {
     {
       code: `router.get(/^\\/downLoad\\/pro-ject\\/([^/]*)\\/OutPut\\/out-put\\.pdf$/)`,
       errors: [
-        { message: 'Route path should be in kebab-case.', suggestions: 1 },
+        {
+          message: 'Route path should be in kebab-case.',
+          suggestions: [
+            {
+              desc: 'Change to kebab-case: /^\\/down-load\\/pro-ject\\/([^/]*)\\/out-put\\/out-put\\.pdf$/',
+              output: `router.get(/^\\/down-load\\/pro-ject\\/([^/]*)\\/out-put\\/out-put\\.pdf$/)`,
+            },
+          ],
+        },
       ],
     },
   ],
@@ -157,28 +168,28 @@ ruleTester.run('no-generated-editor-themes', noGeneratedEditorThemes, {
 ruleTester.run('domock-require-valid-path', viDoMockValidPath, {
   valid: [
     {
-      code: 'vi.doMock("./require-vi-doMock-valid-path.js")',
+      code: 'vi.doMock("../../require-vi-doMock-valid-path.js")',
       filename: __filename,
     },
     {
-      code: 'const filename = "./require-vi-doMock-valid-path.js"; vi.doMock(filename);',
+      code: 'const filename = "../../require-vi-doMock-valid-path.js"; vi.doMock(filename);',
       filename: __filename,
     },
   ],
   invalid: [
     {
-      code: "vi.doMock('./require-vi-doMock-valid-path2')",
+      code: "vi.doMock('../../require-vi-doMock-valid-path2')",
       filename: __filename,
       errors: [
         {
           message:
-            'The path "./require-vi-doMock-valid-path2" in vi.doMock() cannot be resolved relative to the current file.',
+            'The path "../../require-vi-doMock-valid-path2" in vi.doMock() cannot be resolved relative to the current file.',
           suggestions: [],
         },
       ],
     },
     {
-      code: 'const filename = "./require-vi-doMock-valid-path2.js"; vi.doMock(filename);',
+      code: 'const filename = "../../require-vi-doMock-valid-path2.js"; vi.doMock(filename);',
       filename: __filename,
       errors: [
         {
diff --git a/libraries/eslint-plugin/tsconfig.json b/libraries/eslint-plugin/tsconfig.json
index a8e4493a10..5c3833f9db 100644
--- a/libraries/eslint-plugin/tsconfig.json
+++ b/libraries/eslint-plugin/tsconfig.json
@@ -1,4 +1,4 @@
 {
   "extends": "../../tsconfig.backend.json",
-  "include": ["**/*.js"]
+  "include": ["**/*.js", "**/*.cjs", "**/*.ts"]
 }
diff --git a/libraries/eslint-plugin/vitest.config.ts b/libraries/eslint-plugin/vitest.config.ts
new file mode 100644
index 0000000000..c19ff9733a
--- /dev/null
+++ b/libraries/eslint-plugin/vitest.config.ts
@@ -0,0 +1,25 @@
+import { defineConfig, ViteUserConfig } from 'vitest/config'
+
+let reporterOptions: ViteUserConfig['test'] = {}
+if (process.env.CI) {
+  reporterOptions = {
+    reporters: [
+      'default',
+      [
+        'junit',
+        {
+          classnameTemplate: `Unit tests.{filename}`,
+        },
+      ],
+    ],
+    outputFile: 'reports/junit-vitest-unit.xml',
+  }
+}
+export default defineConfig({
+  test: {
+    include: ['test/unit/**/*.test.{js,ts}'],
+    setupFiles: ['./test/setup.js'],
+    isolate: false,
+    ...reporterOptions,
+  },
+})
diff --git a/yarn.lock b/yarn.lock
index 473ca231cc..f088f6e877 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -6843,6 +6843,8 @@ __metadata:
     "@eslint/json": "npm:^2.0.0"
     "@typescript-eslint/parser": "npm:^8.59.4"
     lodash: "npm:^4.18.1"
+    typescript: "npm:^5.0.4"
+    vitest: "npm:4.1.5"
   peerDependencies:
     eslint: ^10.4.0
   languageName: unknown