diff --git a/.eslint-doc-generatorrc.js b/.eslint-doc-generatorrc.js
index a3756beb..df9f4712 100644
--- a/.eslint-doc-generatorrc.js
+++ b/.eslint-doc-generatorrc.js
@@ -9,13 +9,6 @@ const config = {
     'rules-recommended',
     'tests',
     'tests-recommended',
-    'flat/recommended',
-    'flat/all',
-    'flat/all-type-checked',
-    'flat/rules',
-    'flat/rules-recommended',
-    'flat/tests',
-    'flat/tests-recommended',
   ],
   postprocess: async (content, path) =>
     prettier.format(content, {
diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 51902405..b46076ce 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -34,21 +34,10 @@ jobs:
       - uses: actions/checkout@v4
       - uses: actions/setup-node@v4
         with:
-          node-version: "lts/*"
+          node-version: 'lts/*'
       - run: npm install
       - run: npm run lint
 
-  eslint8:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v4
-      - uses: actions/setup-node@v4
-        with:
-          node-version: "lts/*"
-      - run: npm install
-      - run: npm install --save-dev eslint@8
-      - run: npm test
-
   test-remote:
     name: eslint-remote-tester
     runs-on: ubuntu-latest
@@ -56,6 +45,6 @@ jobs:
       - uses: actions/checkout@v4
       - uses: actions/setup-node@v4
         with:
-          node-version: "lts/*"
+          node-version: 'lts/*'
       - run: npm install
       - run: npm run test:remote
diff --git a/README.md b/README.md
index f6eeb235..3b6e5000 100644
--- a/README.md
+++ b/README.md
@@ -6,8 +6,6 @@ An ESLint plugin for linting ESLint plugins. Rules written in CJS, ESM, and Type
 
 - [Installation](#installation)
 - [Usage](#usage)
-  - [**.eslintrc.json**](#eslintrcjson)
-  - [`eslint.config.js` (requires eslint\>=v8.23.0)](#eslintconfigjs-requires-eslintv8230)
 - [Rules](#rules)
   - [Rules](#rules-1)
   - [Tests](#tests)
@@ -42,25 +40,14 @@ Here's an example ESLint configuration that:
 - Enables the `recommended` configuration
 - Enables an optional/non-recommended rule
 
-Note: you might need to set `sourceType` to `script` (most users) (use `module` for ESM/TypeScript).
-
-### <a name='eslintrc'></a>**[.eslintrc.json](https://eslint.org/docs/latest/use/configure/configuration-files)**
-
-```json
-{
-  "extends": ["plugin:eslint-plugin/recommended"],
-  "rules": {
-    "eslint-plugin/require-meta-docs-description": "error"
-  }
-}
-```
-
-### <a name='flat'></a>[`eslint.config.js`](https://eslint.org/docs/latest/use/configure/configuration-files-new) (requires eslint>=v8.23.0)
+Note: you might need to set `sourceType` to `module` or `script` depending on your codebase.
 
 ```js
-const eslintPlugin = require('eslint-plugin-eslint-plugin');
-module.exports = [
-  eslintPlugin.configs['flat/recommended'],
+// eslint.config.js
+import eslintPlugin from 'eslint-plugin-eslint-plugin';
+
+export default [
+  eslintPlugin.configs.recommended,
   {
     rules: {
       'eslint-plugin/require-meta-docs-description': 'error',
@@ -141,54 +128,29 @@ The list of recommended rules will only change in a major release of this plugin
 
 ### <a name='Presetusage'></a>Preset usage
 
-Both flat and eslintrc configs are supported. For example, to enable the `recommended` preset, use:
-
-eslint.config.js
+Example of applying the `recommended` config to all files.
 
 ```js
-const eslintPlugin = require('eslint-plugin-eslint-plugin');
-module.exports = [eslintPlugin.configs['flat/recommended']];
-```
+// eslint.config.js
+import eslintPlugin from 'eslint-plugin-eslint-plugin';
 
-.eslintrc.json
-
-```json
-{
-  "extends": ["plugin:eslint-plugin/recommended"]
-}
+export default [eslintPlugin.configs.recommended];
 ```
 
 Or to apply linting only to the appropriate rule or test files:
 
-eslint.config.js
-
 ```js
-const eslintPlugin = require('eslint-plugin-eslint-plugin');
-module.exports = [
+// eslint.config.js
+import eslintPlugin from 'eslint-plugin-eslint-plugin';
+
+export default [
   {
     files: ['lib/rules/*.{js,ts}'],
-    ...eslintPlugin.configs['flat/rules-recommended'],
+    ...eslintPlugin.configs['rules-recommended'],
   },
   {
     files: ['tests/lib/rules/*.{js,ts}'],
-    ...eslintPlugin.configs['flat/tests-recommended'],
+    ...eslintPlugin.configs['tests-recommended'],
   },
 ];
 ```
-
-.eslintrc.js
-
-```json
-{
-  "overrides": [
-    {
-      "files": ["lib/rules/*.{js,ts}"],
-      "extends": ["plugin:eslint-plugin/rules-recommended"]
-    },
-    {
-      "files": ["tests/lib/rules/*.{js,ts}"],
-      "extends": ["plugin:eslint-plugin/tests-recommended"]
-    }
-  ]
-}
-```
diff --git a/configs/all-type-checked.js b/configs/all-type-checked.js
deleted file mode 100644
index 84309cba..00000000
--- a/configs/all-type-checked.js
+++ /dev/null
@@ -1,10 +0,0 @@
-/**
- * @deprecated use 'flat/all-type-checked' instead
- * @author 唯然<weiran.zsd@outlook.com>
- */
-
-import plugin from '../lib/index.js';
-
-const config = plugin.configs['flat/all-type-checked'];
-
-export default config;
diff --git a/configs/all.js b/configs/all.js
deleted file mode 100644
index cf48e487..00000000
--- a/configs/all.js
+++ /dev/null
@@ -1,11 +0,0 @@
-/**
- * @fileoverview the `all` config for `eslint.config.js`
- * @deprecated use 'flat/all' instead
- * @author 唯然<weiran.zsd@outlook.com>
- */
-
-import plugin from '../lib/index.js';
-
-const config = plugin.configs['flat/all'];
-
-export default config;
diff --git a/configs/recommended.js b/configs/recommended.js
deleted file mode 100644
index 17c2ffad..00000000
--- a/configs/recommended.js
+++ /dev/null
@@ -1,11 +0,0 @@
-/**
- * @fileoverview the `recommended` config for `eslint.config.js`
- * @deprecated use 'flat/recommended' instead
- * @author 唯然<weiran.zsd@outlook.com>
- */
-
-import plugin from '../lib/index.js';
-
-const config = plugin.configs['flat/recommended'];
-
-export default config;
diff --git a/configs/rules-recommended.js b/configs/rules-recommended.js
deleted file mode 100644
index 8e79f61a..00000000
--- a/configs/rules-recommended.js
+++ /dev/null
@@ -1,11 +0,0 @@
-/**
- * @fileoverview the `rules-recommended` config for `eslint.config.js`
- * @deprecated use 'flat/rules-recommended' instead
- * @author 唯然<weiran.zsd@outlook.com>
- */
-
-import plugin from '../lib/index.js';
-
-const config = plugin.configs['flat/rules-recommended'];
-
-export default config;
diff --git a/configs/rules.js b/configs/rules.js
deleted file mode 100644
index f3414360..00000000
--- a/configs/rules.js
+++ /dev/null
@@ -1,11 +0,0 @@
-/**
- * @fileoverview the `rules` config for `eslint.config.js`
- * @deprecated use 'flat/rules' instead
- * @author 唯然<weiran.zsd@outlook.com>
- */
-
-import plugin from '../lib/index.js';
-
-const config = plugin.configs['flat/rules'];
-
-export default config;
diff --git a/configs/tests-recommended.js b/configs/tests-recommended.js
deleted file mode 100644
index 367f5d17..00000000
--- a/configs/tests-recommended.js
+++ /dev/null
@@ -1,11 +0,0 @@
-/**
- * @fileoverview the `tests-recommended` config for `eslint.config.js`
- * @deprecated use 'flat/tests-recommended' instead
- * @author 唯然<weiran.zsd@outlook.com>
- */
-
-import plugin from '../lib/index.js';
-
-const config = plugin.configs['flat/tests-recommended'];
-
-export default config;
diff --git a/configs/tests.js b/configs/tests.js
deleted file mode 100644
index 38ced25c..00000000
--- a/configs/tests.js
+++ /dev/null
@@ -1,11 +0,0 @@
-/**
- * @fileoverview the `tests` config for `eslint.config.js`
- * @deprecated use 'flat/tests' instead
- * @author 唯然<weiran.zsd@outlook.com>
- */
-
-import plugin from '../lib/index.js';
-
-const config = plugin.configs['flat/tests'];
-
-export default config;
diff --git a/docs/rules/require-meta-docs-url.md b/docs/rules/require-meta-docs-url.md
index 4bb71a41..4509fb85 100644
--- a/docs/rules/require-meta-docs-url.md
+++ b/docs/rules/require-meta-docs-url.md
@@ -96,29 +96,54 @@ module.exports = {
 }
 ```
 
+```js
+// eslint.config.js
+import eslintPlugin from 'eslint-plugin-eslint-plugin';
+
+export default [
+  {
+    plugins: { 'eslint-plugin': eslintPlugin },
+    rules: {
+      'eslint-plugin/require-meta-docs-url': [
+        'error',
+        {
+          pattern:
+            'https://github.com/eslint-community/eslint-plugin-eslint-plugin/blob/master/docs/rules/{{name}}.md',
+        },
+      ],
+    },
+  },
+];
+```
+
 If you set the `pattern` option, this rule adds `meta.docs.url` property automatically when you execute `eslint --fix` command.
 
 ## Version specific URL
 
-If you want to enforce version-specific URLs, it's feasible easily with `.eslintrc.js` and `npm version <type>` script.
+If you want to enforce version-specific URLs, it's feasible easily with `eslint.config.js` and `npm version <type>` script.
 For example:
 
-**.eslintrc.js**:
+**eslint.config.js**:
 
 ```js
-// const version = require("./package.json").version;
-
-module.exports = {
-  plugins: ['eslint-plugin'],
-  rules: {
-    'eslint-plugin/require-meta-docs-url': [
-      'error',
-      {
-        pattern: `path/to/v${version}/docs/rules/{{name}}.md`,
-      },
-    ],
+import eslintPlugin from 'eslint-plugin-eslint-plugin';
+import packageMetadata from './package.json' with { type: 'json' };
+
+const { version } = packageMetadata;
+
+export default [
+  {
+    plugins: { 'eslint-plugin': eslintPlugin },
+    rules: {
+      'eslint-plugin/require-meta-docs-url': [
+        'error',
+        {
+          pattern: `path/to/v${version}/docs/rules/{{name}}.md`,
+        },
+      ],
+    },
   },
-};
+];
 ```
 
 **package.json**:
diff --git a/eslint.config.js b/eslint.config.js
index f34afb74..3bf9f756 100644
--- a/eslint.config.js
+++ b/eslint.config.js
@@ -4,7 +4,7 @@ import js from '@eslint/js';
 import { FlatCompat } from '@eslint/eslintrc';
 import markdown from 'eslint-plugin-markdown';
 import pluginN from 'eslint-plugin-n';
-import eslintPluginConfig from 'eslint-plugin-eslint-plugin/configs/all';
+import eslintPlugin from './lib/index.js';
 
 const dirname = path.dirname(fileURLToPath(import.meta.url));
 const compat = new FlatCompat({
@@ -46,9 +46,9 @@ export default [
   {
     // Apply eslint-plugin rules to our own rules/tests (but not docs).
     files: ['lib/**/*.js', 'tests/**/*.js'],
-    plugins: eslintPluginConfig.plugins,
+    plugins: { 'eslint-plugin': eslintPlugin },
     rules: {
-      ...eslintPluginConfig.rules,
+      ...eslintPlugin.configs.all.rules,
       'eslint-plugin/no-meta-schema-default': 'off', // TODO: enable once https://github.com/bmish/eslint-doc-generator/issues/513 is fixed and released
       'eslint-plugin/report-message-format': ['error', '^[^a-z].*.$'],
       'eslint-plugin/require-meta-docs-url': [
@@ -77,6 +77,8 @@ export default [
 
       '@eslint-community/eslint-comments/require-description': 'off',
 
+      'n/no-missing-import': 'off',
+
       'unicorn/filename-case': 'off',
     },
   },
diff --git a/lib/index.js b/lib/index.js
index 83f4a93e..f512a196 100644
--- a/lib/index.js
+++ b/lib/index.js
@@ -105,31 +105,14 @@ const plugin = {
   configs: {}, // assigned later
 };
 
-// eslintrc configs
+// configs
 Object.assign(
   plugin.configs,
   Object.keys(configFilters).reduce((configs, configName) => {
     return Object.assign(configs, {
       [configName]: {
-        plugins: ['eslint-plugin'],
-        rules: Object.fromEntries(
-          Object.keys(allRules)
-            .filter((ruleName) => configFilters[configName](allRules[ruleName]))
-            .map((ruleName) => [`${PLUGIN_NAME}/${ruleName}`, 'error']),
-        ),
-      },
-    });
-  }, {}),
-);
-
-// flat configs
-Object.assign(
-  plugin.configs,
-  Object.keys(configFilters).reduce((configs, configName) => {
-    return Object.assign(configs, {
-      [`flat/${configName}`]: {
-        name: `eslint-plugin/flat/${configName}`,
-        plugins: { 'eslint-plugin': plugin },
+        name: `${PLUGIN_NAME}/${configName}`,
+        plugins: { [PLUGIN_NAME]: plugin },
         rules: Object.fromEntries(
           Object.keys(allRules)
             .filter((ruleName) => configFilters[configName](allRules[ruleName]))
diff --git a/package.json b/package.json
index 2ec7b244..5bd6c441 100644
--- a/package.json
+++ b/package.json
@@ -7,7 +7,6 @@
   "type": "module",
   "exports": {
     ".": "./lib/index.js",
-    "./configs/*": "./configs/*.js",
     "./package.json": "./package.json"
   },
   "license": "MIT",
@@ -24,8 +23,8 @@
     "update:eslint-docs": "eslint-doc-generator"
   },
   "files": [
-    "lib/",
-    "configs/"
+    "CHANGELOG.md",
+    "lib/"
   ],
   "keywords": [
     "eslint",
@@ -79,7 +78,7 @@
     "vitest": "^3.2.4"
   },
   "peerDependencies": {
-    "eslint": ">=8.23.0"
+    "eslint": ">=9.0.0"
   },
   "engines": {
     "node": "^18.18.0 || ^20.9.0 || >=21.1.0"
diff --git a/tests/lib/rules/consistent-output.js b/tests/lib/rules/consistent-output.js
index 60ac1899..e63d62f7 100644
--- a/tests/lib/rules/consistent-output.js
+++ b/tests/lib/rules/consistent-output.js
@@ -8,7 +8,7 @@
 // ------------------------------------------------------------------------------
 
 import rule from '../../../lib/rules/consistent-output.js';
-import { RuleTester } from '../../utils/eslint-rule-tester.js';
+import { RuleTester } from 'eslint';
 
 const ERROR = { messageId: 'missingOutput', type: 'ObjectExpression' };
 
diff --git a/tests/lib/rules/fixer-return.js b/tests/lib/rules/fixer-return.js
index cc3798c5..bff61ee3 100644
--- a/tests/lib/rules/fixer-return.js
+++ b/tests/lib/rules/fixer-return.js
@@ -8,7 +8,7 @@
 // ------------------------------------------------------------------------------
 
 import rule from '../../../lib/rules/fixer-return.js';
-import { RuleTester } from '../../utils/eslint-rule-tester.js';
+import { RuleTester } from 'eslint';
 
 // ------------------------------------------------------------------------------
 // Tests
diff --git a/tests/lib/rules/meta-property-ordering.js b/tests/lib/rules/meta-property-ordering.js
index 1a843e94..632dfe59 100644
--- a/tests/lib/rules/meta-property-ordering.js
+++ b/tests/lib/rules/meta-property-ordering.js
@@ -7,7 +7,7 @@
 // ------------------------------------------------------------------------------
 
 import rule from '../../../lib/rules/meta-property-ordering.js';
-import { RuleTester } from '../../utils/eslint-rule-tester.js';
+import { RuleTester } from 'eslint';
 
 // ------------------------------------------------------------------------------
 // Tests
diff --git a/tests/lib/rules/no-deprecated-context-methods.js b/tests/lib/rules/no-deprecated-context-methods.js
index 7338f37e..14eaaccc 100644
--- a/tests/lib/rules/no-deprecated-context-methods.js
+++ b/tests/lib/rules/no-deprecated-context-methods.js
@@ -8,7 +8,7 @@
 // ------------------------------------------------------------------------------
 
 import rule from '../../../lib/rules/no-deprecated-context-methods.js';
-import { RuleTester } from '../../utils/eslint-rule-tester.js';
+import { RuleTester } from 'eslint';
 
 // ------------------------------------------------------------------------------
 // Tests
diff --git a/tests/lib/rules/no-deprecated-report-api.js b/tests/lib/rules/no-deprecated-report-api.js
index ed1bd422..636b2c11 100644
--- a/tests/lib/rules/no-deprecated-report-api.js
+++ b/tests/lib/rules/no-deprecated-report-api.js
@@ -8,7 +8,7 @@
 // ------------------------------------------------------------------------------
 
 import rule from '../../../lib/rules/no-deprecated-report-api.js';
-import { RuleTester } from '../../utils/eslint-rule-tester.js';
+import { RuleTester } from 'eslint';
 
 // ------------------------------------------------------------------------------
 // Tests
diff --git a/tests/lib/rules/no-identical-tests.js b/tests/lib/rules/no-identical-tests.js
index bcfcd8cd..169d9140 100644
--- a/tests/lib/rules/no-identical-tests.js
+++ b/tests/lib/rules/no-identical-tests.js
@@ -8,7 +8,7 @@
 // ------------------------------------------------------------------------------
 
 import rule from '../../../lib/rules/no-identical-tests.js';
-import { RuleTester } from '../../utils/eslint-rule-tester.js';
+import { RuleTester } from 'eslint';
 
 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 2d357a39..9ec810fa 100644
--- a/tests/lib/rules/no-meta-replaced-by.js
+++ b/tests/lib/rules/no-meta-replaced-by.js
@@ -7,7 +7,7 @@
 // ------------------------------------------------------------------------------
 
 import rule from '../../../lib/rules/no-meta-replaced-by.js';
-import { RuleTester } from '../../utils/eslint-rule-tester.js';
+import { RuleTester } from 'eslint';
 
 // ------------------------------------------------------------------------------
 // Tests
diff --git a/tests/lib/rules/no-meta-schema-default.js b/tests/lib/rules/no-meta-schema-default.js
index 06376284..07dd50d1 100644
--- a/tests/lib/rules/no-meta-schema-default.js
+++ b/tests/lib/rules/no-meta-schema-default.js
@@ -3,7 +3,7 @@
 // ------------------------------------------------------------------------------
 
 import rule from '../../../lib/rules/no-meta-schema-default.js';
-import { RuleTester } from '../../utils/eslint-rule-tester.js';
+import { RuleTester } from 'eslint';
 
 // ------------------------------------------------------------------------------
 // Tests
diff --git a/tests/lib/rules/no-missing-message-ids.js b/tests/lib/rules/no-missing-message-ids.js
index efee8a9d..aa0045a0 100644
--- a/tests/lib/rules/no-missing-message-ids.js
+++ b/tests/lib/rules/no-missing-message-ids.js
@@ -3,7 +3,7 @@
 // ------------------------------------------------------------------------------
 
 import rule from '../../../lib/rules/no-missing-message-ids.js';
-import { RuleTester } from '../../utils/eslint-rule-tester.js';
+import { RuleTester } from 'eslint';
 
 // ------------------------------------------------------------------------------
 // Tests
diff --git a/tests/lib/rules/no-missing-placeholders.js b/tests/lib/rules/no-missing-placeholders.js
index 13767ec2..2791fee2 100644
--- a/tests/lib/rules/no-missing-placeholders.js
+++ b/tests/lib/rules/no-missing-placeholders.js
@@ -8,7 +8,7 @@
 // ------------------------------------------------------------------------------
 
 import rule from '../../../lib/rules/no-missing-placeholders.js';
-import { RuleTester } from '../../utils/eslint-rule-tester.js';
+import { RuleTester } from 'eslint';
 
 /**
  * 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 25257c65..b7f52125 100644
--- a/tests/lib/rules/no-only-tests.js
+++ b/tests/lib/rules/no-only-tests.js
@@ -3,7 +3,7 @@
 // ------------------------------------------------------------------------------
 
 import rule from '../../../lib/rules/no-only-tests.js';
-import { RuleTester } from '../../utils/eslint-rule-tester.js';
+import { RuleTester } from 'eslint';
 
 // ------------------------------------------------------------------------------
 // Tests
diff --git a/tests/lib/rules/no-property-in-node.js b/tests/lib/rules/no-property-in-node.js
index d5614cf7..8f2674d0 100644
--- a/tests/lib/rules/no-property-in-node.js
+++ b/tests/lib/rules/no-property-in-node.js
@@ -1,4 +1,4 @@
-import { RuleTester } from '../../utils/eslint-rule-tester.js';
+import { RuleTester } from 'eslint';
 import path from 'path';
 import { fileURLToPath } from 'url';
 import rule from '../../../lib/rules/no-property-in-node.js';
diff --git a/tests/lib/rules/no-unused-message-ids.js b/tests/lib/rules/no-unused-message-ids.js
index 54184cdc..244651e1 100644
--- a/tests/lib/rules/no-unused-message-ids.js
+++ b/tests/lib/rules/no-unused-message-ids.js
@@ -3,7 +3,7 @@
 // ------------------------------------------------------------------------------
 
 import rule from '../../../lib/rules/no-unused-message-ids.js';
-import { RuleTester } from '../../utils/eslint-rule-tester.js';
+import { RuleTester } from 'eslint';
 
 // ------------------------------------------------------------------------------
 // Tests
diff --git a/tests/lib/rules/no-unused-placeholders.js b/tests/lib/rules/no-unused-placeholders.js
index 87de5cb9..b9d55158 100644
--- a/tests/lib/rules/no-unused-placeholders.js
+++ b/tests/lib/rules/no-unused-placeholders.js
@@ -8,7 +8,7 @@
 // ------------------------------------------------------------------------------
 
 import rule from '../../../lib/rules/no-unused-placeholders.js';
-import { RuleTester } from '../../utils/eslint-rule-tester.js';
+import { RuleTester } from 'eslint';
 
 /**
  * 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 0ad6b61f..7b6f44e7 100644
--- a/tests/lib/rules/no-useless-token-range.js
+++ b/tests/lib/rules/no-useless-token-range.js
@@ -8,7 +8,7 @@
 // ------------------------------------------------------------------------------
 
 import rule from '../../../lib/rules/no-useless-token-range.js';
-import { RuleTester } from '../../utils/eslint-rule-tester.js';
+import { RuleTester } from 'eslint';
 
 /**
  * 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 342fb501..9a45cb28 100644
--- a/tests/lib/rules/prefer-message-ids.js
+++ b/tests/lib/rules/prefer-message-ids.js
@@ -3,7 +3,7 @@
 // ------------------------------------------------------------------------------
 
 import rule from '../../../lib/rules/prefer-message-ids.js';
-import { RuleTester } from '../../utils/eslint-rule-tester.js';
+import { RuleTester } from 'eslint';
 
 // ------------------------------------------------------------------------------
 // Tests
diff --git a/tests/lib/rules/prefer-object-rule.js b/tests/lib/rules/prefer-object-rule.js
index 0e1583f7..4c25013c 100644
--- a/tests/lib/rules/prefer-object-rule.js
+++ b/tests/lib/rules/prefer-object-rule.js
@@ -7,7 +7,7 @@
 // ------------------------------------------------------------------------------
 
 import rule from '../../../lib/rules/prefer-object-rule.js';
-import { RuleTester } from '../../utils/eslint-rule-tester.js';
+import { RuleTester } from 'eslint';
 
 // ------------------------------------------------------------------------------
 // Tests
diff --git a/tests/lib/rules/prefer-output-null.js b/tests/lib/rules/prefer-output-null.js
index 22e7bfb4..082e41c4 100644
--- a/tests/lib/rules/prefer-output-null.js
+++ b/tests/lib/rules/prefer-output-null.js
@@ -8,7 +8,7 @@
 // ------------------------------------------------------------------------------
 
 import rule from '../../../lib/rules/prefer-output-null.js';
-import { RuleTester } from '../../utils/eslint-rule-tester.js';
+import { RuleTester } from 'eslint';
 
 const ERROR = { messageId: 'useOutputNull', type: 'Property' };
 
diff --git a/tests/lib/rules/prefer-placeholders.js b/tests/lib/rules/prefer-placeholders.js
index 2da2c535..4b2f6447 100644
--- a/tests/lib/rules/prefer-placeholders.js
+++ b/tests/lib/rules/prefer-placeholders.js
@@ -8,7 +8,7 @@
 // ------------------------------------------------------------------------------
 
 import rule from '../../../lib/rules/prefer-placeholders.js';
-import { RuleTester } from '../../utils/eslint-rule-tester.js';
+import { RuleTester } from 'eslint';
 
 // ------------------------------------------------------------------------------
 // Tests
diff --git a/tests/lib/rules/prefer-replace-text.js b/tests/lib/rules/prefer-replace-text.js
index e8dc8041..06117252 100644
--- a/tests/lib/rules/prefer-replace-text.js
+++ b/tests/lib/rules/prefer-replace-text.js
@@ -8,7 +8,7 @@
 // ------------------------------------------------------------------------------
 
 import rule from '../../../lib/rules/prefer-replace-text.js';
-import { RuleTester } from '../../utils/eslint-rule-tester.js';
+import { RuleTester } from 'eslint';
 
 // ------------------------------------------------------------------------------
 // Tests
diff --git a/tests/lib/rules/report-message-format.js b/tests/lib/rules/report-message-format.js
index 8a1c7338..be260092 100644
--- a/tests/lib/rules/report-message-format.js
+++ b/tests/lib/rules/report-message-format.js
@@ -8,7 +8,7 @@
 // ------------------------------------------------------------------------------
 
 import rule from '../../../lib/rules/report-message-format.js';
-import { RuleTester } from '../../utils/eslint-rule-tester.js';
+import { RuleTester } from 'eslint';
 
 // ------------------------------------------------------------------------------
 // Tests
diff --git a/tests/lib/rules/require-meta-default-options.js b/tests/lib/rules/require-meta-default-options.js
index b0e3df4f..d6ceb410 100644
--- a/tests/lib/rules/require-meta-default-options.js
+++ b/tests/lib/rules/require-meta-default-options.js
@@ -1,5 +1,5 @@
 import rule from '../../../lib/rules/require-meta-default-options.js';
-import { RuleTester } from '../../utils/eslint-rule-tester.js';
+import { RuleTester } from 'eslint';
 import parser from '@typescript-eslint/parser';
 
 const ruleTester = new RuleTester({
diff --git a/tests/lib/rules/require-meta-docs-description.js b/tests/lib/rules/require-meta-docs-description.js
index d3aa09bd..28d49910 100644
--- a/tests/lib/rules/require-meta-docs-description.js
+++ b/tests/lib/rules/require-meta-docs-description.js
@@ -3,7 +3,7 @@
 // ------------------------------------------------------------------------------
 
 import rule from '../../../lib/rules/require-meta-docs-description.js';
-import { RuleTester } from '../../utils/eslint-rule-tester.js';
+import { RuleTester } from 'eslint';
 import parser from '@typescript-eslint/parser';
 
 // ------------------------------------------------------------------------------
diff --git a/tests/lib/rules/require-meta-docs-recommended.js b/tests/lib/rules/require-meta-docs-recommended.js
index b50a3b93..60a9d72a 100644
--- a/tests/lib/rules/require-meta-docs-recommended.js
+++ b/tests/lib/rules/require-meta-docs-recommended.js
@@ -1,5 +1,5 @@
 import rule from '../../../lib/rules/require-meta-docs-recommended.js';
-import { RuleTester } from '../../utils/eslint-rule-tester.js';
+import { RuleTester } from 'eslint';
 import parser from '@typescript-eslint/parser';
 
 const ruleTester = new RuleTester({
diff --git a/tests/lib/rules/require-meta-docs-url.js b/tests/lib/rules/require-meta-docs-url.js
index a13d63b2..50895f05 100644
--- a/tests/lib/rules/require-meta-docs-url.js
+++ b/tests/lib/rules/require-meta-docs-url.js
@@ -8,7 +8,7 @@
 // Requirements
 // -----------------------------------------------------------------------------
 
-import { RuleTester } from '../../utils/eslint-rule-tester.js';
+import { RuleTester } from 'eslint';
 import rule from '../../../lib/rules/require-meta-docs-url.js';
 
 // -----------------------------------------------------------------------------
diff --git a/tests/lib/rules/require-meta-fixable.js b/tests/lib/rules/require-meta-fixable.js
index a0d343f3..3bde53c7 100644
--- a/tests/lib/rules/require-meta-fixable.js
+++ b/tests/lib/rules/require-meta-fixable.js
@@ -8,7 +8,7 @@
 // ------------------------------------------------------------------------------
 
 import rule from '../../../lib/rules/require-meta-fixable.js';
-import { RuleTester } from '../../utils/eslint-rule-tester.js';
+import { RuleTester } from 'eslint';
 
 // ------------------------------------------------------------------------------
 // Tests
diff --git a/tests/lib/rules/require-meta-has-suggestions.js b/tests/lib/rules/require-meta-has-suggestions.js
index 9c19d011..8bb7eb84 100644
--- a/tests/lib/rules/require-meta-has-suggestions.js
+++ b/tests/lib/rules/require-meta-has-suggestions.js
@@ -3,7 +3,7 @@
 // ------------------------------------------------------------------------------
 
 import rule from '../../../lib/rules/require-meta-has-suggestions.js';
-import { RuleTester } from '../../utils/eslint-rule-tester.js';
+import { RuleTester } from 'eslint';
 
 // ------------------------------------------------------------------------------
 // Tests
diff --git a/tests/lib/rules/require-meta-schema-description.js b/tests/lib/rules/require-meta-schema-description.js
index 6fb5b741..fa0b414f 100644
--- a/tests/lib/rules/require-meta-schema-description.js
+++ b/tests/lib/rules/require-meta-schema-description.js
@@ -3,7 +3,7 @@
 // ------------------------------------------------------------------------------
 
 import rule from '../../../lib/rules/require-meta-schema-description.js';
-import { RuleTester } from '../../utils/eslint-rule-tester.js';
+import { RuleTester } from 'eslint';
 
 // ------------------------------------------------------------------------------
 // Tests
diff --git a/tests/lib/rules/require-meta-schema.js b/tests/lib/rules/require-meta-schema.js
index aff9df9f..5c6c6af0 100644
--- a/tests/lib/rules/require-meta-schema.js
+++ b/tests/lib/rules/require-meta-schema.js
@@ -3,7 +3,7 @@
 // ------------------------------------------------------------------------------
 
 import rule from '../../../lib/rules/require-meta-schema.js';
-import { RuleTester } from '../../utils/eslint-rule-tester.js';
+import { RuleTester } from 'eslint';
 
 // ------------------------------------------------------------------------------
 // Tests
diff --git a/tests/lib/rules/require-meta-type.js b/tests/lib/rules/require-meta-type.js
index ae52476f..7d44b041 100644
--- a/tests/lib/rules/require-meta-type.js
+++ b/tests/lib/rules/require-meta-type.js
@@ -8,7 +8,7 @@
 // ------------------------------------------------------------------------------
 
 import rule from '../../../lib/rules/require-meta-type.js';
-import { RuleTester } from '../../utils/eslint-rule-tester.js';
+import { RuleTester } from 'eslint';
 
 // ------------------------------------------------------------------------------
 // Tests
diff --git a/tests/lib/rules/test-case-property-ordering.js b/tests/lib/rules/test-case-property-ordering.js
index 65b8970a..05fb8554 100644
--- a/tests/lib/rules/test-case-property-ordering.js
+++ b/tests/lib/rules/test-case-property-ordering.js
@@ -8,7 +8,7 @@
 // ------------------------------------------------------------------------------
 
 import rule from '../../../lib/rules/test-case-property-ordering.js';
-import { RuleTester } from '../../utils/eslint-rule-tester.js';
+import { RuleTester } from 'eslint';
 
 // ------------------------------------------------------------------------------
 // Tests
diff --git a/tests/lib/rules/test-case-shorthand-strings.js b/tests/lib/rules/test-case-shorthand-strings.js
index f358d3ee..c65d0c18 100644
--- a/tests/lib/rules/test-case-shorthand-strings.js
+++ b/tests/lib/rules/test-case-shorthand-strings.js
@@ -8,7 +8,7 @@
 // ------------------------------------------------------------------------------
 
 import rule from '../../../lib/rules/test-case-shorthand-strings.js';
-import { RuleTester } from '../../utils/eslint-rule-tester.js';
+import { RuleTester } from 'eslint';
 
 /**
  * Returns the code for some valid test cases
diff --git a/tests/utils/eslint-rule-tester.js b/tests/utils/eslint-rule-tester.js
deleted file mode 100644
index 5b3c5239..00000000
--- a/tests/utils/eslint-rule-tester.js
+++ /dev/null
@@ -1,21 +0,0 @@
-/**
- * @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/tests/utils/test-setup.js b/tests/utils/test-setup.js
new file mode 100644
index 00000000..342265eb
--- /dev/null
+++ b/tests/utils/test-setup.js
@@ -0,0 +1,6 @@
+import { RuleTester } from 'eslint';
+import * as vitest from 'vitest';
+
+RuleTester.describe = vitest.describe;
+RuleTester.it = vitest.it;
+RuleTester.itOnly = vitest.it.only;
diff --git a/vitest.config.ts b/vitest.config.ts
index 64bc7458..56cb0fcc 100644
--- a/vitest.config.ts
+++ b/vitest.config.ts
@@ -4,6 +4,7 @@ export default defineConfig({
   test: {
     include: ['tests/lib/**/*.js'],
     exclude: ['tests/lib/fixtures/**'],
+    setupFiles: ['tests/utils/test-setup.js'],
     clearMocks: true,
     coverage: {
       all: true,