diff --git a/.gitignore b/.gitignore
index 642ad460..281b1c34 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,5 +1,5 @@
 .idea
-.nyc_output
+coverage
 .vscode
 node_modules/
 npm-debug.log
diff --git a/eslint.config.js b/eslint.config.js
index 24f9f4ea..b25c54b1 100644
--- a/eslint.config.js
+++ b/eslint.config.js
@@ -2,7 +2,6 @@
 
 const js = require('@eslint/js');
 const { FlatCompat } = require('@eslint/eslintrc');
-const globals = require('globals');
 const markdown = require('eslint-plugin-markdown');
 const pluginN = require('eslint-plugin-n');
 const eslintPluginConfig = require('eslint-plugin-eslint-plugin/configs/all');
@@ -54,7 +53,7 @@ module.exports = [
   },
   {
     files: ['tests/**/*.js'],
-    languageOptions: { globals: globals.mocha },
+    languageOptions: { sourceType: 'module' },
   },
   {
     files: ['**/*.md'],
diff --git a/package.json b/package.json
index 939af51f..63da8091 100644
--- a/package.json
+++ b/package.json
@@ -18,7 +18,7 @@
     "lint:js-docs": "eslint --no-inline-config \"**/*.md\"",
     "lint:package-json": "npmPkgJsonLint .",
     "release": "release-it",
-    "test": "nyc --all --check-coverage --include lib mocha tests --recursive",
+    "test": "vitest run --coverage",
     "test:remote": "eslint-remote-tester -c ./eslint-remote-tester.config.mjs",
     "update:eslint-docs": "eslint-doc-generator"
   },
@@ -43,12 +43,6 @@
     "@eslint-community/eslint-utils": "^4.4.0",
     "estraverse": "^5.3.0"
   },
-  "nyc": {
-    "branches": 95,
-    "functions": 99,
-    "lines": 99,
-    "statements": 99
-  },
   "devDependencies": {
     "@commitlint/cli": "^19.6.0",
     "@commitlint/config-conventional": "^19.6.0",
@@ -60,7 +54,7 @@
     "@types/estree": "^1.0.8",
     "@typescript-eslint/parser": "^8.34.1",
     "@typescript-eslint/utils": "^8.34.1",
-    "chai": "^4.5.0",
+    "@vitest/coverage-istanbul": "^3.2.4",
     "eslint": "^9.16.0",
     "eslint-config-not-an-aardvark": "^2.1.0",
     "eslint-config-prettier": "^9.1.0",
@@ -73,17 +67,15 @@
     "eslint-remote-tester": "^4.0.1",
     "eslint-scope": "^8.0.1",
     "espree": "^10.0.1",
-    "globals": "^15.13.0",
     "husky": "^9.1.7",
     "lodash": "^4.17.21",
     "markdownlint-cli": "^0.43.0",
-    "mocha": "^11.0.0",
     "npm-package-json-lint": "^8.0.0",
     "npm-run-all2": "^7.0.1",
-    "nyc": "^17.1.0",
     "prettier": "^3.4.1",
     "release-it": "^17.2.0",
-    "typescript": "^5.8.3"
+    "typescript": "^5.8.3",
+    "vitest": "^3.2.4"
   },
   "peerDependencies": {
     "eslint": ">=8.23.0"
diff --git a/tests/lib/eslint-rule-tester.js b/tests/lib/eslint-rule-tester.js
deleted file mode 100644
index dd16a8e2..00000000
--- a/tests/lib/eslint-rule-tester.js
+++ /dev/null
@@ -1,15 +0,0 @@
-/**
- * @fileoverview Helpers for tests.
- * @author 唯然<weiran.zsd@outlook.com>
- */
-
-'use strict';
-
-const eslintVersion = require('eslint/package.json').version;
-const { RuleTester } = require('eslint');
-const { FlatRuleTester } = require('eslint/use-at-your-own-risk');
-
-// greater than or equal to ESLint v9
-exports.gteEslintV9 = +eslintVersion.split('.')[0] >= 9;
-
-exports.RuleTester = exports.gteEslintV9 ? RuleTester : FlatRuleTester;
diff --git a/tests/lib/fixtures/tsconfig.json b/tests/lib/fixtures/tsconfig.json
index 0d505be7..403ce01b 100644
--- a/tests/lib/fixtures/tsconfig.json
+++ b/tests/lib/fixtures/tsconfig.json
@@ -1,5 +1,6 @@
 {
   "compilerOptions": {
     "moduleResolution": "NodeNext"
-  }
+  },
+  "include": ["*.ts"]
 }
diff --git a/tests/lib/index.js b/tests/lib/index.js
index 794d0d57..96f52e44 100644
--- a/tests/lib/index.js
+++ b/tests/lib/index.js
@@ -1,7 +1,6 @@
-'use strict';
+import { assert, describe, it } from 'vitest';
 
-const assert = require('chai').assert;
-const plugin = require('../..');
+import plugin from '../../lib/index.js';
 
 const RULE_NAMES = Object.keys(plugin.rules);
 
diff --git a/tests/lib/rule-setup.js b/tests/lib/rule-setup.js
index a1c75e82..ab097bc3 100644
--- a/tests/lib/rule-setup.js
+++ b/tests/lib/rule-setup.js
@@ -1,15 +1,17 @@
-'use strict';
+import { readdirSync, readFileSync } from 'node:fs';
+import path from 'node:path';
+import { fileURLToPath } from 'node:url';
 
-const { readdirSync, readFileSync } = require('fs');
-const path = require('path');
-const assert = require('chai').assert;
-const plugin = require('../..');
+import { assert, describe, it } from 'vitest';
+
+import plugin from '../../lib/index.js';
 
 const RULE_NAMES = Object.keys(plugin.rules);
+const dirname = path.dirname(fileURLToPath(import.meta.url));
 
 describe('rule setup is correct', () => {
   it('should have a list of exported rules and rules directory that match', () => {
-    const filePath = path.join(__dirname, '..', 'lib', 'rules');
+    const filePath = path.join(dirname, '..', 'lib', 'rules');
     const files = readdirSync(filePath);
 
     assert.deepStrictEqual(
@@ -34,7 +36,7 @@ describe('rule setup is correct', () => {
 
         it('should have the right contents', () => {
           const filePath = path.join(
-            __dirname,
+            dirname,
             '..',
             '..',
             'lib',
@@ -53,7 +55,7 @@ describe('rule setup is correct', () => {
   });
 
   it('should have tests for all rules', () => {
-    const filePath = path.join(__dirname, 'rules');
+    const filePath = path.join(dirname, 'rules');
     const files = readdirSync(filePath);
 
     assert.deepStrictEqual(
@@ -65,7 +67,7 @@ describe('rule setup is correct', () => {
   });
 
   it('should have documentation for all rules', () => {
-    const filePath = path.join(__dirname, '..', '..', 'docs', 'rules');
+    const filePath = path.join(dirname, '..', '..', 'docs', 'rules');
     const files = readdirSync(filePath);
 
     assert.deepStrictEqual(
diff --git a/tests/lib/rules/consistent-output.js b/tests/lib/rules/consistent-output.js
index 75ecabe8..60ac1899 100644
--- a/tests/lib/rules/consistent-output.js
+++ b/tests/lib/rules/consistent-output.js
@@ -3,14 +3,12 @@
  * @author Teddy Katz
  */
 
-'use strict';
-
 // ------------------------------------------------------------------------------
 // Requirements
 // ------------------------------------------------------------------------------
 
-const rule = require('../../../lib/rules/consistent-output');
-const RuleTester = require('../eslint-rule-tester').RuleTester;
+import rule from '../../../lib/rules/consistent-output.js';
+import { RuleTester } from '../../utils/eslint-rule-tester.js';
 
 const ERROR = { messageId: 'missingOutput', type: 'ObjectExpression' };
 
diff --git a/tests/lib/rules/fixer-return.js b/tests/lib/rules/fixer-return.js
index 349a9bf4..cc3798c5 100644
--- a/tests/lib/rules/fixer-return.js
+++ b/tests/lib/rules/fixer-return.js
@@ -3,14 +3,12 @@
  * @author 薛定谔的猫<hh_2013@foxmail.com>
  */
 
-'use strict';
-
 // ------------------------------------------------------------------------------
 // Requirements
 // ------------------------------------------------------------------------------
 
-const rule = require('../../../lib/rules/fixer-return');
-const RuleTester = require('../eslint-rule-tester').RuleTester;
+import rule from '../../../lib/rules/fixer-return.js';
+import { RuleTester } from '../../utils/eslint-rule-tester.js';
 
 // ------------------------------------------------------------------------------
 // Tests
diff --git a/tests/lib/rules/meta-property-ordering.js b/tests/lib/rules/meta-property-ordering.js
index 1d4dfec8..1a843e94 100644
--- a/tests/lib/rules/meta-property-ordering.js
+++ b/tests/lib/rules/meta-property-ordering.js
@@ -2,14 +2,12 @@
  * @fileoverview Enforces the order of meta properties
  */
 
-'use strict';
-
 // ------------------------------------------------------------------------------
 // Requirements
 // ------------------------------------------------------------------------------
 
-const rule = require('../../../lib/rules/meta-property-ordering');
-const RuleTester = require('../eslint-rule-tester').RuleTester;
+import rule from '../../../lib/rules/meta-property-ordering.js';
+import { RuleTester } from '../../utils/eslint-rule-tester.js';
 
 // ------------------------------------------------------------------------------
 // Tests
diff --git a/tests/lib/rules/no-deprecated-context-methods.js b/tests/lib/rules/no-deprecated-context-methods.js
index 84770ccd..7338f37e 100644
--- a/tests/lib/rules/no-deprecated-context-methods.js
+++ b/tests/lib/rules/no-deprecated-context-methods.js
@@ -3,14 +3,12 @@
  * @author Teddy Katz
  */
 
-'use strict';
-
 // ------------------------------------------------------------------------------
 // Requirements
 // ------------------------------------------------------------------------------
 
-const rule = require('../../../lib/rules/no-deprecated-context-methods');
-const RuleTester = require('../eslint-rule-tester').RuleTester;
+import rule from '../../../lib/rules/no-deprecated-context-methods.js';
+import { RuleTester } from '../../utils/eslint-rule-tester.js';
 
 // ------------------------------------------------------------------------------
 // Tests
diff --git a/tests/lib/rules/no-deprecated-report-api.js b/tests/lib/rules/no-deprecated-report-api.js
index 6483fbde..ed1bd422 100644
--- a/tests/lib/rules/no-deprecated-report-api.js
+++ b/tests/lib/rules/no-deprecated-report-api.js
@@ -3,14 +3,12 @@
  * @author Teddy Katz
  */
 
-'use strict';
-
 // ------------------------------------------------------------------------------
 // Requirements
 // ------------------------------------------------------------------------------
 
-const rule = require('../../../lib/rules/no-deprecated-report-api');
-const RuleTester = require('../eslint-rule-tester').RuleTester;
+import rule from '../../../lib/rules/no-deprecated-report-api.js';
+import { RuleTester } from '../../utils/eslint-rule-tester.js';
 
 // ------------------------------------------------------------------------------
 // Tests
diff --git a/tests/lib/rules/no-identical-tests.js b/tests/lib/rules/no-identical-tests.js
index 6f0e444e..bcfcd8cd 100644
--- a/tests/lib/rules/no-identical-tests.js
+++ b/tests/lib/rules/no-identical-tests.js
@@ -3,14 +3,12 @@
  * @author 薛定谔的猫<hh_2013@foxmail.com>
  */
 
-'use strict';
-
 // ------------------------------------------------------------------------------
 // Requirements
 // ------------------------------------------------------------------------------
 
-const rule = require('../../../lib/rules/no-identical-tests');
-const RuleTester = require('../eslint-rule-tester').RuleTester;
+import rule from '../../../lib/rules/no-identical-tests.js';
+import { RuleTester } from '../../utils/eslint-rule-tester.js';
 
 const ERROR_OBJECT_TEST = { messageId: 'identical', type: 'ObjectExpression' };
 const ERROR_STRING_TEST = { messageId: 'identical', type: 'Literal' };
diff --git a/tests/lib/rules/no-meta-replaced-by.js b/tests/lib/rules/no-meta-replaced-by.js
index d72f41ac..2d357a39 100644
--- a/tests/lib/rules/no-meta-replaced-by.js
+++ b/tests/lib/rules/no-meta-replaced-by.js
@@ -2,14 +2,12 @@
  * @fileoverview Disallows the usage of `meta.replacedBy` property
  */
 
-'use strict';
-
 // ------------------------------------------------------------------------------
 // Requirements
 // ------------------------------------------------------------------------------
 
-const rule = require('../../../lib/rules/no-meta-replaced-by');
-const RuleTester = require('../eslint-rule-tester').RuleTester;
+import rule from '../../../lib/rules/no-meta-replaced-by.js';
+import { RuleTester } from '../../utils/eslint-rule-tester.js';
 
 // ------------------------------------------------------------------------------
 // Tests
diff --git a/tests/lib/rules/no-meta-schema-default.js b/tests/lib/rules/no-meta-schema-default.js
index 869f4971..06376284 100644
--- a/tests/lib/rules/no-meta-schema-default.js
+++ b/tests/lib/rules/no-meta-schema-default.js
@@ -1,11 +1,9 @@
-'use strict';
-
 // ------------------------------------------------------------------------------
 // Requirements
 // ------------------------------------------------------------------------------
 
-const rule = require('../../../lib/rules/no-meta-schema-default');
-const RuleTester = require('../eslint-rule-tester').RuleTester;
+import rule from '../../../lib/rules/no-meta-schema-default.js';
+import { RuleTester } from '../../utils/eslint-rule-tester.js';
 
 // ------------------------------------------------------------------------------
 // Tests
diff --git a/tests/lib/rules/no-missing-message-ids.js b/tests/lib/rules/no-missing-message-ids.js
index 78b9e600..efee8a9d 100644
--- a/tests/lib/rules/no-missing-message-ids.js
+++ b/tests/lib/rules/no-missing-message-ids.js
@@ -1,11 +1,9 @@
-'use strict';
-
 // ------------------------------------------------------------------------------
 // Requirements
 // ------------------------------------------------------------------------------
 
-const rule = require('../../../lib/rules/no-missing-message-ids');
-const RuleTester = require('../eslint-rule-tester').RuleTester;
+import rule from '../../../lib/rules/no-missing-message-ids.js';
+import { RuleTester } from '../../utils/eslint-rule-tester.js';
 
 // ------------------------------------------------------------------------------
 // Tests
diff --git a/tests/lib/rules/no-missing-placeholders.js b/tests/lib/rules/no-missing-placeholders.js
index 43bb137b..13767ec2 100644
--- a/tests/lib/rules/no-missing-placeholders.js
+++ b/tests/lib/rules/no-missing-placeholders.js
@@ -3,14 +3,12 @@
  * @author Teddy Katz
  */
 
-'use strict';
-
 // ------------------------------------------------------------------------------
 // Requirements
 // ------------------------------------------------------------------------------
 
-const rule = require('../../../lib/rules/no-missing-placeholders');
-const RuleTester = require('../eslint-rule-tester').RuleTester;
+import rule from '../../../lib/rules/no-missing-placeholders.js';
+import { RuleTester } from '../../utils/eslint-rule-tester.js';
 
 /**
  * Create an error for the given key
diff --git a/tests/lib/rules/no-only-tests.js b/tests/lib/rules/no-only-tests.js
index 0df7e600..25257c65 100644
--- a/tests/lib/rules/no-only-tests.js
+++ b/tests/lib/rules/no-only-tests.js
@@ -1,11 +1,9 @@
-'use strict';
-
 // ------------------------------------------------------------------------------
 // Requirements
 // ------------------------------------------------------------------------------
 
-const rule = require('../../../lib/rules/no-only-tests');
-const RuleTester = require('../eslint-rule-tester').RuleTester;
+import rule from '../../../lib/rules/no-only-tests.js';
+import { RuleTester } from '../../utils/eslint-rule-tester.js';
 
 // ------------------------------------------------------------------------------
 // Tests
diff --git a/tests/lib/rules/no-property-in-node.js b/tests/lib/rules/no-property-in-node.js
index 952e976f..c7225404 100644
--- a/tests/lib/rules/no-property-in-node.js
+++ b/tests/lib/rules/no-property-in-node.js
@@ -1,12 +1,11 @@
-'use strict';
-
-const RuleTester = require('../eslint-rule-tester').RuleTester;
-const path = require('path');
-const rule = require('../../../lib/rules/no-property-in-node');
+import { RuleTester } from '../../utils/eslint-rule-tester.js';
+import path from 'path';
+import rule from '../../../lib/rules/no-property-in-node.js';
+import parser from '@typescript-eslint/parser';
 
 const ruleTester = new RuleTester({
   languageOptions: {
-    parser: require('@typescript-eslint/parser'),
+    parser,
     parserOptions: {
       projectService: {
         defaultProject: 'tsconfig.json',
diff --git a/tests/lib/rules/no-unused-message-ids.js b/tests/lib/rules/no-unused-message-ids.js
index 8f5f6fa8..54184cdc 100644
--- a/tests/lib/rules/no-unused-message-ids.js
+++ b/tests/lib/rules/no-unused-message-ids.js
@@ -1,11 +1,9 @@
-'use strict';
-
 // ------------------------------------------------------------------------------
 // Requirements
 // ------------------------------------------------------------------------------
 
-const rule = require('../../../lib/rules/no-unused-message-ids');
-const RuleTester = require('../eslint-rule-tester').RuleTester;
+import rule from '../../../lib/rules/no-unused-message-ids.js';
+import { RuleTester } from '../../utils/eslint-rule-tester.js';
 
 // ------------------------------------------------------------------------------
 // Tests
diff --git a/tests/lib/rules/no-unused-placeholders.js b/tests/lib/rules/no-unused-placeholders.js
index fd93b777..87de5cb9 100644
--- a/tests/lib/rules/no-unused-placeholders.js
+++ b/tests/lib/rules/no-unused-placeholders.js
@@ -3,14 +3,12 @@
  * @author 薛定谔的猫<hh_2013@foxmail.com>
  */
 
-'use strict';
-
 // ------------------------------------------------------------------------------
 // Requirements
 // ------------------------------------------------------------------------------
 
-const rule = require('../../../lib/rules/no-unused-placeholders');
-const RuleTester = require('../eslint-rule-tester').RuleTester;
+import rule from '../../../lib/rules/no-unused-placeholders.js';
+import { RuleTester } from '../../utils/eslint-rule-tester.js';
 
 /**
  * Create an error for the given key
diff --git a/tests/lib/rules/no-useless-token-range.js b/tests/lib/rules/no-useless-token-range.js
index c4b13960..0ad6b61f 100644
--- a/tests/lib/rules/no-useless-token-range.js
+++ b/tests/lib/rules/no-useless-token-range.js
@@ -3,14 +3,12 @@
  * @author Teddy Katz
  */
 
-'use strict';
-
 // ------------------------------------------------------------------------------
 // Requirements
 // ------------------------------------------------------------------------------
 
-const rule = require('../../../lib/rules/no-useless-token-range');
-const RuleTester = require('../eslint-rule-tester').RuleTester;
+import rule from '../../../lib/rules/no-useless-token-range.js';
+import { RuleTester } from '../../utils/eslint-rule-tester.js';
 
 /**
  * Wraps a code sample as an eslint rule
diff --git a/tests/lib/rules/prefer-message-ids.js b/tests/lib/rules/prefer-message-ids.js
index ac54184e..342fb501 100644
--- a/tests/lib/rules/prefer-message-ids.js
+++ b/tests/lib/rules/prefer-message-ids.js
@@ -1,11 +1,9 @@
-'use strict';
-
 // ------------------------------------------------------------------------------
 // Requirements
 // ------------------------------------------------------------------------------
 
-const rule = require('../../../lib/rules/prefer-message-ids');
-const RuleTester = require('../eslint-rule-tester').RuleTester;
+import rule from '../../../lib/rules/prefer-message-ids.js';
+import { RuleTester } from '../../utils/eslint-rule-tester.js';
 
 // ------------------------------------------------------------------------------
 // Tests
diff --git a/tests/lib/rules/prefer-object-rule.js b/tests/lib/rules/prefer-object-rule.js
index 9c0aae74..0e1583f7 100644
--- a/tests/lib/rules/prefer-object-rule.js
+++ b/tests/lib/rules/prefer-object-rule.js
@@ -2,14 +2,12 @@
  * @author Brad Zacher <https://github.com/bradzacher>
  */
 
-'use strict';
-
 // ------------------------------------------------------------------------------
 // Requirements
 // ------------------------------------------------------------------------------
 
-const rule = require('../../../lib/rules/prefer-object-rule');
-const RuleTester = require('../eslint-rule-tester').RuleTester;
+import rule from '../../../lib/rules/prefer-object-rule.js';
+import { RuleTester } from '../../utils/eslint-rule-tester.js';
 
 // ------------------------------------------------------------------------------
 // Tests
diff --git a/tests/lib/rules/prefer-output-null.js b/tests/lib/rules/prefer-output-null.js
index b7c0eda1..22e7bfb4 100644
--- a/tests/lib/rules/prefer-output-null.js
+++ b/tests/lib/rules/prefer-output-null.js
@@ -3,14 +3,12 @@
  * @author 薛定谔的猫<hh_2013@foxmail.com>
  */
 
-'use strict';
-
 // ------------------------------------------------------------------------------
 // Requirements
 // ------------------------------------------------------------------------------
 
-const rule = require('../../../lib/rules/prefer-output-null');
-const RuleTester = require('../eslint-rule-tester').RuleTester;
+import rule from '../../../lib/rules/prefer-output-null.js';
+import { RuleTester } from '../../utils/eslint-rule-tester.js';
 
 const ERROR = { messageId: 'useOutputNull', type: 'Property' };
 
diff --git a/tests/lib/rules/prefer-placeholders.js b/tests/lib/rules/prefer-placeholders.js
index f7fe49e0..2da2c535 100644
--- a/tests/lib/rules/prefer-placeholders.js
+++ b/tests/lib/rules/prefer-placeholders.js
@@ -3,14 +3,12 @@
  * @author Teddy Katz
  */
 
-'use strict';
-
 // ------------------------------------------------------------------------------
 // Requirements
 // ------------------------------------------------------------------------------
 
-const rule = require('../../../lib/rules/prefer-placeholders');
-const RuleTester = require('../eslint-rule-tester').RuleTester;
+import rule from '../../../lib/rules/prefer-placeholders.js';
+import { RuleTester } from '../../utils/eslint-rule-tester.js';
 
 // ------------------------------------------------------------------------------
 // Tests
diff --git a/tests/lib/rules/prefer-replace-text.js b/tests/lib/rules/prefer-replace-text.js
index c83a9559..e8dc8041 100644
--- a/tests/lib/rules/prefer-replace-text.js
+++ b/tests/lib/rules/prefer-replace-text.js
@@ -3,14 +3,12 @@
  * @author 薛定谔的猫<hh_2013@foxmail.com>
  */
 
-'use strict';
-
 // ------------------------------------------------------------------------------
 // Requirements
 // ------------------------------------------------------------------------------
 
-const rule = require('../../../lib/rules/prefer-replace-text');
-const RuleTester = require('../eslint-rule-tester').RuleTester;
+import rule from '../../../lib/rules/prefer-replace-text.js';
+import { RuleTester } from '../../utils/eslint-rule-tester.js';
 
 // ------------------------------------------------------------------------------
 // Tests
diff --git a/tests/lib/rules/report-message-format.js b/tests/lib/rules/report-message-format.js
index 7ca4cf10..8a1c7338 100644
--- a/tests/lib/rules/report-message-format.js
+++ b/tests/lib/rules/report-message-format.js
@@ -3,14 +3,12 @@
  * @author Teddy Katz
  */
 
-'use strict';
-
 // ------------------------------------------------------------------------------
 // Requirements
 // ------------------------------------------------------------------------------
 
-const rule = require('../../../lib/rules/report-message-format');
-const RuleTester = require('../eslint-rule-tester').RuleTester;
+import rule from '../../../lib/rules/report-message-format.js';
+import { RuleTester } from '../../utils/eslint-rule-tester.js';
 
 // ------------------------------------------------------------------------------
 // Tests
diff --git a/tests/lib/rules/require-meta-default-options.js b/tests/lib/rules/require-meta-default-options.js
index da2b4209..b0e3df4f 100644
--- a/tests/lib/rules/require-meta-default-options.js
+++ b/tests/lib/rules/require-meta-default-options.js
@@ -1,7 +1,6 @@
-'use strict';
-
-const rule = require('../../../lib/rules/require-meta-default-options');
-const RuleTester = require('../eslint-rule-tester').RuleTester;
+import rule from '../../../lib/rules/require-meta-default-options.js';
+import { RuleTester } from '../../utils/eslint-rule-tester.js';
+import parser from '@typescript-eslint/parser';
 
 const ruleTester = new RuleTester({
   languageOptions: { sourceType: 'commonjs' },
@@ -149,7 +148,7 @@ ruleTester.run('require-meta-default-options', rule, {
 
 const ruleTesterTypeScript = new RuleTester({
   languageOptions: {
-    parser: require('@typescript-eslint/parser'),
+    parser,
     parserOptions: { sourceType: 'module' },
   },
 });
diff --git a/tests/lib/rules/require-meta-docs-description.js b/tests/lib/rules/require-meta-docs-description.js
index 2b4ded37..d3aa09bd 100644
--- a/tests/lib/rules/require-meta-docs-description.js
+++ b/tests/lib/rules/require-meta-docs-description.js
@@ -1,11 +1,10 @@
-'use strict';
-
 // ------------------------------------------------------------------------------
 // Requirements
 // ------------------------------------------------------------------------------
 
-const rule = require('../../../lib/rules/require-meta-docs-description');
-const RuleTester = require('../eslint-rule-tester').RuleTester;
+import rule from '../../../lib/rules/require-meta-docs-description.js';
+import { RuleTester } from '../../utils/eslint-rule-tester.js';
+import parser from '@typescript-eslint/parser';
 
 // ------------------------------------------------------------------------------
 // Tests
@@ -298,7 +297,7 @@ ruleTester.run('require-meta-docs-description', rule, {
 const ruleTesterTypeScript = new RuleTester({
   languageOptions: {
     sourceType: 'module',
-    parser: require('@typescript-eslint/parser'),
+    parser,
   },
 });
 ruleTesterTypeScript.run('require-meta-docs-description (TypeScript)', rule, {
diff --git a/tests/lib/rules/require-meta-docs-recommended.js b/tests/lib/rules/require-meta-docs-recommended.js
index 1a58bacc..b50a3b93 100644
--- a/tests/lib/rules/require-meta-docs-recommended.js
+++ b/tests/lib/rules/require-meta-docs-recommended.js
@@ -1,7 +1,6 @@
-'use strict';
-
-const rule = require('../../../lib/rules/require-meta-docs-recommended');
-const RuleTester = require('../eslint-rule-tester').RuleTester;
+import rule from '../../../lib/rules/require-meta-docs-recommended.js';
+import { RuleTester } from '../../utils/eslint-rule-tester.js';
+import parser from '@typescript-eslint/parser';
 
 const ruleTester = new RuleTester({
   languageOptions: { sourceType: 'commonjs' },
@@ -269,7 +268,7 @@ ruleTester.run('require-meta-docs-recommended', rule, {
 
 const ruleTesterTypeScript = new RuleTester({
   languageOptions: {
-    parser: require('@typescript-eslint/parser'),
+    parser,
     parserOptions: { sourceType: 'module' },
   },
 });
diff --git a/tests/lib/rules/require-meta-docs-url.js b/tests/lib/rules/require-meta-docs-url.js
index da7a9048..a13d63b2 100644
--- a/tests/lib/rules/require-meta-docs-url.js
+++ b/tests/lib/rules/require-meta-docs-url.js
@@ -4,14 +4,12 @@
  * See LICENSE file in root directory for full license.
  */
 
-'use strict';
-
 // -----------------------------------------------------------------------------
 // Requirements
 // -----------------------------------------------------------------------------
 
-const RuleTester = require('../eslint-rule-tester').RuleTester;
-const rule = require('../../../lib/rules/require-meta-docs-url');
+import { RuleTester } from '../../utils/eslint-rule-tester.js';
+import rule from '../../../lib/rules/require-meta-docs-url.js';
 
 // -----------------------------------------------------------------------------
 // Tests
diff --git a/tests/lib/rules/require-meta-fixable.js b/tests/lib/rules/require-meta-fixable.js
index 8aef6c04..a0d343f3 100644
--- a/tests/lib/rules/require-meta-fixable.js
+++ b/tests/lib/rules/require-meta-fixable.js
@@ -3,14 +3,12 @@
  * @author Teddy Katz
  */
 
-'use strict';
-
 // ------------------------------------------------------------------------------
 // Requirements
 // ------------------------------------------------------------------------------
 
-const rule = require('../../../lib/rules/require-meta-fixable');
-const RuleTester = require('../eslint-rule-tester').RuleTester;
+import rule from '../../../lib/rules/require-meta-fixable.js';
+import { RuleTester } from '../../utils/eslint-rule-tester.js';
 
 // ------------------------------------------------------------------------------
 // Tests
diff --git a/tests/lib/rules/require-meta-has-suggestions.js b/tests/lib/rules/require-meta-has-suggestions.js
index 0a1e96ab..9c19d011 100644
--- a/tests/lib/rules/require-meta-has-suggestions.js
+++ b/tests/lib/rules/require-meta-has-suggestions.js
@@ -1,11 +1,9 @@
-'use strict';
-
 // ------------------------------------------------------------------------------
 // Requirements
 // ------------------------------------------------------------------------------
 
-const rule = require('../../../lib/rules/require-meta-has-suggestions');
-const RuleTester = require('../eslint-rule-tester').RuleTester;
+import rule from '../../../lib/rules/require-meta-has-suggestions.js';
+import { RuleTester } from '../../utils/eslint-rule-tester.js';
 
 // ------------------------------------------------------------------------------
 // Tests
diff --git a/tests/lib/rules/require-meta-schema-description.js b/tests/lib/rules/require-meta-schema-description.js
index 1b3f4256..6fb5b741 100644
--- a/tests/lib/rules/require-meta-schema-description.js
+++ b/tests/lib/rules/require-meta-schema-description.js
@@ -1,11 +1,9 @@
-'use strict';
-
 // ------------------------------------------------------------------------------
 // Requirements
 // ------------------------------------------------------------------------------
 
-const rule = require('../../../lib/rules/require-meta-schema-description');
-const RuleTester = require('../eslint-rule-tester').RuleTester;
+import rule from '../../../lib/rules/require-meta-schema-description.js';
+import { RuleTester } from '../../utils/eslint-rule-tester.js';
 
 // ------------------------------------------------------------------------------
 // Tests
diff --git a/tests/lib/rules/require-meta-schema.js b/tests/lib/rules/require-meta-schema.js
index dfb1754d..aff9df9f 100644
--- a/tests/lib/rules/require-meta-schema.js
+++ b/tests/lib/rules/require-meta-schema.js
@@ -1,11 +1,9 @@
-'use strict';
-
 // ------------------------------------------------------------------------------
 // Requirements
 // ------------------------------------------------------------------------------
 
-const rule = require('../../../lib/rules/require-meta-schema');
-const RuleTester = require('../eslint-rule-tester').RuleTester;
+import rule from '../../../lib/rules/require-meta-schema.js';
+import { RuleTester } from '../../utils/eslint-rule-tester.js';
 
 // ------------------------------------------------------------------------------
 // Tests
diff --git a/tests/lib/rules/require-meta-type.js b/tests/lib/rules/require-meta-type.js
index 2180e23e..ae52476f 100644
--- a/tests/lib/rules/require-meta-type.js
+++ b/tests/lib/rules/require-meta-type.js
@@ -3,14 +3,12 @@
  * @author 唯然<weiran.zsd@outlook.com>
  */
 
-'use strict';
-
 // ------------------------------------------------------------------------------
 // Requirements
 // ------------------------------------------------------------------------------
 
-const rule = require('../../../lib/rules/require-meta-type');
-const RuleTester = require('../eslint-rule-tester').RuleTester;
+import rule from '../../../lib/rules/require-meta-type.js';
+import { RuleTester } from '../../utils/eslint-rule-tester.js';
 
 // ------------------------------------------------------------------------------
 // Tests
diff --git a/tests/lib/rules/test-case-property-ordering.js b/tests/lib/rules/test-case-property-ordering.js
index 149278d1..65b8970a 100644
--- a/tests/lib/rules/test-case-property-ordering.js
+++ b/tests/lib/rules/test-case-property-ordering.js
@@ -3,14 +3,12 @@
  * @author 薛定谔的猫<hh_2013@foxmail.com>
  */
 
-'use strict';
-
 // ------------------------------------------------------------------------------
 // Requirements
 // ------------------------------------------------------------------------------
 
-const rule = require('../../../lib/rules/test-case-property-ordering');
-const RuleTester = require('../eslint-rule-tester').RuleTester;
+import rule from '../../../lib/rules/test-case-property-ordering.js';
+import { RuleTester } from '../../utils/eslint-rule-tester.js';
 
 // ------------------------------------------------------------------------------
 // Tests
diff --git a/tests/lib/rules/test-case-shorthand-strings.js b/tests/lib/rules/test-case-shorthand-strings.js
index 4deddade..f358d3ee 100644
--- a/tests/lib/rules/test-case-shorthand-strings.js
+++ b/tests/lib/rules/test-case-shorthand-strings.js
@@ -3,14 +3,12 @@
  * @author Teddy Katz
  */
 
-'use strict';
-
 // ------------------------------------------------------------------------------
 // Requirements
 // ------------------------------------------------------------------------------
 
-const rule = require('../../../lib/rules/test-case-shorthand-strings');
-const RuleTester = require('../eslint-rule-tester').RuleTester;
+import rule from '../../../lib/rules/test-case-shorthand-strings.js';
+import { RuleTester } from '../../utils/eslint-rule-tester.js';
 
 /**
  * Returns the code for some valid test cases
diff --git a/tests/lib/utils.js b/tests/lib/utils.js
index d299abcc..22e2a539 100644
--- a/tests/lib/utils.js
+++ b/tests/lib/utils.js
@@ -1,13 +1,13 @@
-'use strict';
-
-const { inspect } = require('util');
-const lodash = require('lodash');
-const espree = require('espree');
-const eslintScope = require('eslint-scope');
-const estraverse = require('estraverse');
-const assert = require('chai').assert;
-const utils = require('../../lib/utils');
-const typescriptEslintParser = require('@typescript-eslint/parser');
+import { inspect } from 'node:util';
+
+import typescriptEslintParser from '@typescript-eslint/parser';
+import * as eslintScope from 'eslint-scope';
+import * as espree from 'espree';
+import * as estraverse from 'estraverse';
+import lodash from 'lodash';
+import { assert, describe, it } from 'vitest';
+
+import * as utils from '../../lib/utils.js';
 
 describe('utils', () => {
   describe('getRuleInfo', () => {
diff --git a/tests/utils/eslint-rule-tester.js b/tests/utils/eslint-rule-tester.js
new file mode 100644
index 00000000..5b3c5239
--- /dev/null
+++ b/tests/utils/eslint-rule-tester.js
@@ -0,0 +1,21 @@
+/**
+ * @fileoverview Helpers for tests.
+ * @author 唯然<weiran.zsd@outlook.com>
+ */
+
+import { RuleTester as ESLintRuleTester } from 'eslint';
+import * as unsupportedApi from 'eslint/use-at-your-own-risk';
+import packageConfig from 'eslint/package.json' with { type: 'json' };
+import * as vitest from 'vitest';
+
+const { version: eslintVersion } = packageConfig;
+
+const FlatRuleTester = unsupportedApi.FlatRuleTester;
+
+// greater than or equal to ESLint v9
+export const gteEslintV9 = +eslintVersion.split('.')[0] >= 9;
+
+export const RuleTester = gteEslintV9 ? ESLintRuleTester : FlatRuleTester;
+RuleTester.describe = vitest.describe;
+RuleTester.it = vitest.it;
+RuleTester.itOnly = vitest.it.only;
diff --git a/vitest.config.ts b/vitest.config.ts
new file mode 100644
index 00000000..64bc7458
--- /dev/null
+++ b/vitest.config.ts
@@ -0,0 +1,21 @@
+import { defineConfig } from 'vitest/config';
+
+export default defineConfig({
+  test: {
+    include: ['tests/lib/**/*.js'],
+    exclude: ['tests/lib/fixtures/**'],
+    clearMocks: true,
+    coverage: {
+      all: true,
+      include: ['lib'],
+      reporter: ['html', 'lcov', 'text'],
+      provider: 'istanbul',
+      thresholds: {
+        statements: 95,
+        branches: 93,
+        functions: 95,
+        lines: 95,
+      },
+    },
+  },
+});