diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 4d21950e4..b04aa3b0b 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -76,6 +76,9 @@ jobs:
       - name: Install Dependencies
         run: pnpm install
 
+      - name: Type Check
+        run: pnpm run type-check
+
       - name: Unit Test
         run: pnpm run test:unit
 
diff --git a/package.json b/package.json
index 8f8bfc3bc..26b18e7e1 100644
--- a/package.json
+++ b/package.json
@@ -22,6 +22,7 @@
     "test:unit": "vitest run --project unit*",
     "test:unit:watch": "vitest --project unit*",
     "testu": "pnpm run test:unit -u && pnpm run test:integration -u",
+    "type-check": "pnpm -r run type-check",
     "update:rsbuild": "npx taze minor --include /rsbuild/ -w -r -l",
     "watch": "pnpm build --watch"
   },
diff --git a/packages/core/package.json b/packages/core/package.json
index ad09f0c38..a069f3423 100644
--- a/packages/core/package.json
+++ b/packages/core/package.json
@@ -34,7 +34,8 @@
   "scripts": {
     "build": "rslib build",
     "dev": "rslib build --watch",
-    "prebundle": "prebundle"
+    "prebundle": "prebundle",
+    "type-check": "tsc --noEmit && tsc --noEmit -p tests"
   },
   "dependencies": {
     "@rsbuild/core": "1.2.0-beta.0",
diff --git a/packages/core/src/utils/syntax.ts b/packages/core/src/utils/syntax.ts
index b07ab1236..d4cf76fab 100644
--- a/packages/core/src/utils/syntax.ts
+++ b/packages/core/src/utils/syntax.ts
@@ -48,7 +48,7 @@ const RSPACK_TARGET_UNLISTED_MODERN_ECMA_VERSIONS: EcmaScriptVersion[] = [
  */
 export const ESX_TO_BROWSERSLIST: Record<
   FixedEcmaVersions,
-  Record<string, string | string[]>
+  Record<string, string>
 > &
   Record<LatestEcmaVersions, (target: RsbuildConfigOutputTarget) => string[]> =
   {
diff --git a/packages/core/tests/config.test.ts b/packages/core/tests/config.test.ts
index 27e851583..c8a6adf8a 100644
--- a/packages/core/tests/config.test.ts
+++ b/packages/core/tests/config.test.ts
@@ -222,7 +222,7 @@ describe('syntax', () => {
     const composedRsbuildConfig = await composeCreateRsbuildConfig(rslibConfig);
 
     expect(
-      composedRsbuildConfig[0].config.output?.overrideBrowserslist,
+      composedRsbuildConfig[0]!.config.output?.overrideBrowserslist,
     ).toMatchInlineSnapshot(`
       [
         "last 1 node versions",
@@ -245,7 +245,7 @@ describe('syntax', () => {
     const composedRsbuildConfig = await composeCreateRsbuildConfig(rslibConfig);
 
     expect(
-      composedRsbuildConfig[0].config.output?.overrideBrowserslist,
+      composedRsbuildConfig[0]!.config.output?.overrideBrowserslist,
     ).toMatchInlineSnapshot(`
       [
         "last 1 Chrome versions",
@@ -273,7 +273,7 @@ describe('syntax', () => {
     const composedRsbuildConfig = await composeCreateRsbuildConfig(rslibConfig);
 
     expect(
-      composedRsbuildConfig[0].config.output?.overrideBrowserslist,
+      composedRsbuildConfig[0]!.config.output?.overrideBrowserslist,
     ).toMatchInlineSnapshot(`
       [
         "last 1 node versions",
@@ -294,7 +294,7 @@ describe('syntax', () => {
     const composedRsbuildConfig = await composeCreateRsbuildConfig(rslibConfig);
 
     expect(
-      composedRsbuildConfig[0].config.output?.overrideBrowserslist,
+      composedRsbuildConfig[0]!.config.output?.overrideBrowserslist,
     ).toMatchInlineSnapshot(`
       [
         "chrome >= 63.0.0",
@@ -322,7 +322,7 @@ describe('minify', () => {
     const composedRsbuildConfig = await composeCreateRsbuildConfig(rslibConfig);
 
     expect(
-      composedRsbuildConfig[0].config.output?.minify,
+      composedRsbuildConfig[0]!.config.output?.minify,
     ).toMatchInlineSnapshot(`
       {
         "css": false,
@@ -380,15 +380,15 @@ describe('minify', () => {
     const composedRsbuildConfig = await composeCreateRsbuildConfig(rslibConfig);
 
     expect(
-      composedRsbuildConfig[0].config.output?.minify,
+      composedRsbuildConfig[0]!.config.output?.minify,
     ).toMatchInlineSnapshot('false');
 
     expect(
-      composedRsbuildConfig[1].config.output?.minify,
+      composedRsbuildConfig[1]!.config.output?.minify,
     ).toMatchInlineSnapshot('true');
 
     expect(
-      composedRsbuildConfig[2].config.output?.minify,
+      composedRsbuildConfig[2]!.config.output?.minify,
     ).toMatchInlineSnapshot(`
       {
         "css": true,
diff --git a/packages/core/tests/extension.test.ts b/packages/core/tests/extension.test.ts
index dcad0ce77..363789db2 100644
--- a/packages/core/tests/extension.test.ts
+++ b/packages/core/tests/extension.test.ts
@@ -14,7 +14,9 @@ describe('should get extension correctly', () => {
   it('autoExtension is false', () => {
     const options: Options = {
       format: 'cjs',
-      pkgJson: {},
+      pkgJson: {
+        name: 'foo',
+      },
       autoExtension: false,
     };
 
@@ -44,6 +46,7 @@ describe('should get extension correctly', () => {
     const options: Options = {
       format: 'cjs',
       pkgJson: {
+        name: 'foo',
         type: 'module',
       },
       autoExtension: true,
@@ -62,6 +65,7 @@ describe('should get extension correctly', () => {
     const options: Options = {
       format: 'cjs',
       pkgJson: {
+        name: 'foo',
         type: 'commonjs',
       },
       autoExtension: true,
@@ -80,6 +84,7 @@ describe('should get extension correctly', () => {
     const options: Options = {
       format: 'esm',
       pkgJson: {
+        name: 'foo',
         type: 'commonjs',
       },
       autoExtension: true,
@@ -98,6 +103,7 @@ describe('should get extension correctly', () => {
     const options: Options = {
       format: 'esm',
       pkgJson: {
+        name: 'foo',
         type: 'module',
       },
       autoExtension: true,
diff --git a/packages/core/tests/external.test.ts b/packages/core/tests/external.test.ts
index 4dada5d99..7398cd5cc 100644
--- a/packages/core/tests/external.test.ts
+++ b/packages/core/tests/external.test.ts
@@ -6,6 +6,7 @@ vi.mock('rslog');
 describe('should composeAutoExternalConfig correctly', () => {
   it('autoExternal default value', () => {
     const esmResult = composeAutoExternalConfig({
+      bundle: true,
       format: 'esm',
       autoExternal: undefined,
       pkgJson: {
@@ -17,6 +18,7 @@ describe('should composeAutoExternalConfig correctly', () => {
     });
 
     const cjsResult = composeAutoExternalConfig({
+      bundle: true,
       format: 'cjs',
       autoExternal: undefined,
       pkgJson: {
@@ -28,6 +30,7 @@ describe('should composeAutoExternalConfig correctly', () => {
     });
 
     const umdResult = composeAutoExternalConfig({
+      bundle: true,
       format: 'umd',
       autoExternal: undefined,
       pkgJson: {
@@ -39,6 +42,7 @@ describe('should composeAutoExternalConfig correctly', () => {
     });
 
     const mfResult = composeAutoExternalConfig({
+      bundle: true,
       format: 'mf',
       autoExternal: undefined,
       pkgJson: {
@@ -77,6 +81,7 @@ describe('should composeAutoExternalConfig correctly', () => {
 
   it('autoExternal is true', () => {
     const result = composeAutoExternalConfig({
+      bundle: true,
       format: 'esm',
       autoExternal: true,
       pkgJson: {
@@ -110,6 +115,7 @@ describe('should composeAutoExternalConfig correctly', () => {
 
   it('autoExternal is true when format is umd or mf', () => {
     const umdResult = composeAutoExternalConfig({
+      bundle: true,
       format: 'umd',
       autoExternal: true,
       pkgJson: {
@@ -132,6 +138,7 @@ describe('should composeAutoExternalConfig correctly', () => {
     `);
 
     const mfResult = composeAutoExternalConfig({
+      bundle: true,
       format: 'mf',
       autoExternal: true,
       pkgJson: {
@@ -156,6 +163,7 @@ describe('should composeAutoExternalConfig correctly', () => {
 
   it('autoExternal will deduplication ', () => {
     const result = composeAutoExternalConfig({
+      bundle: true,
       format: 'esm',
       autoExternal: true,
       pkgJson: {
@@ -191,6 +199,7 @@ describe('should composeAutoExternalConfig correctly', () => {
 
   it('autoExternal is object', () => {
     const result = composeAutoExternalConfig({
+      bundle: true,
       format: 'esm',
       autoExternal: {
         peerDependencies: false,
@@ -219,6 +228,7 @@ describe('should composeAutoExternalConfig correctly', () => {
 
   it('autoExternal is false', () => {
     const result = composeAutoExternalConfig({
+      bundle: true,
       format: 'esm',
       autoExternal: false,
       pkgJson: {
@@ -234,6 +244,7 @@ describe('should composeAutoExternalConfig correctly', () => {
 
   it('autoExternal with user externals object', () => {
     const result = composeAutoExternalConfig({
+      bundle: true,
       format: 'esm',
       autoExternal: true,
       pkgJson: {
@@ -257,10 +268,21 @@ describe('should composeAutoExternalConfig correctly', () => {
 
   it('read package.json failed', () => {
     const result = composeAutoExternalConfig({
+      bundle: true,
       format: 'esm',
       autoExternal: true,
     });
 
     expect(result).toEqual({});
   });
+
+  it('bundleless', () => {
+    const result = composeAutoExternalConfig({
+      bundle: false,
+      format: 'esm',
+      autoExternal: true,
+    });
+
+    expect(result).toStrictEqual({});
+  });
 });
diff --git a/packages/core/tests/syntax.test.ts b/packages/core/tests/syntax.test.ts
index 58269e122..99f38d297 100644
--- a/packages/core/tests/syntax.test.ts
+++ b/packages/core/tests/syntax.test.ts
@@ -1,4 +1,5 @@
 import { describe, expect, test } from 'vitest';
+import type { EcmaScriptVersion } from '../src/types';
 import {
   ESX_TO_BROWSERSLIST,
   transformSyntaxToBrowserslist,
@@ -6,8 +7,16 @@ import {
 } from '../src/utils/syntax';
 
 const compareSemver = (a: string, b: string) => {
-  const [aMajor, aMinor, aPatch] = a.split('.').map(Number);
-  const [bMajor, bMinor, bPatch] = b.split('.').map(Number);
+  const [aMajor, aMinor, aPatch] = a.split('.').map(Number) as [
+    number,
+    number,
+    number,
+  ];
+  const [bMajor, bMinor, bPatch] = b.split('.').map(Number) as [
+    number,
+    number,
+    number,
+  ];
 
   if (aMajor !== bMajor) {
     return aMajor - bMajor;
@@ -27,7 +36,7 @@ describe('ESX_TO_BROWSERSLIST', () => {
   });
 
   test('ECMA version mapped browserslist queries should increments', () => {
-    const sortedVersions = [
+    const sortedVersions: EcmaScriptVersion[] = [
       'es5',
       'es6',
       'es2015',
@@ -39,16 +48,18 @@ describe('ESX_TO_BROWSERSLIST', () => {
       'es2021',
       'es2022',
       'es2023',
-      'es2024',
-      'esnext',
     ];
 
     for (let i = 1; i < sortedVersions.length; i++) {
-      const prev = sortedVersions[i - 1];
-      const current = sortedVersions[i];
+      const prev = sortedVersions[i - 1]!;
+      const current = sortedVersions[i]!;
       for (const query of Object.keys(ESX_TO_BROWSERSLIST[current])) {
-        const prevQuery = ESX_TO_BROWSERSLIST[prev][query];
-        const currQuery = ESX_TO_BROWSERSLIST[current][query];
+        const prevQuery = (ESX_TO_BROWSERSLIST[prev] as Record<string, string>)[
+          query
+        ];
+        const currQuery = (
+          ESX_TO_BROWSERSLIST[current] as Record<string, string>
+        )[query];
         if (prevQuery && currQuery) {
           expect(compareSemver(currQuery, prevQuery)).toBeGreaterThanOrEqual(0);
         }
@@ -59,7 +70,9 @@ describe('ESX_TO_BROWSERSLIST', () => {
 
 describe('transformSyntaxToBrowserslist', () => {
   test('esX', () => {
-    expect(transformSyntaxToBrowserslist('es2015')).toMatchInlineSnapshot(`
+    expect(
+      transformSyntaxToBrowserslist('es2015', 'web'),
+    ).toMatchInlineSnapshot(`
       [
         "chrome >= 63.0.0",
         "edge >= 79.0.0",
@@ -71,7 +84,9 @@ describe('transformSyntaxToBrowserslist', () => {
       ]
     `);
 
-    expect(transformSyntaxToBrowserslist('es2018')).toMatchInlineSnapshot(`
+    expect(
+      transformSyntaxToBrowserslist('es2018', 'web'),
+    ).toMatchInlineSnapshot(`
       [
         "chrome >= 64.0.0",
         "edge >= 79.0.0",
@@ -111,7 +126,7 @@ describe('transformSyntaxToBrowserslist', () => {
 
   test('browserslist', () => {
     expect(
-      transformSyntaxToBrowserslist(['fully supports es6-module']),
+      transformSyntaxToBrowserslist(['fully supports es6-module'], 'web'),
     ).toMatchInlineSnapshot(`
         [
           "fully supports es6-module",
@@ -119,7 +134,7 @@ describe('transformSyntaxToBrowserslist', () => {
       `);
 
     expect(
-      transformSyntaxToBrowserslist(['node 14', 'Chrome 103']),
+      transformSyntaxToBrowserslist(['node 14', 'Chrome 103'], 'web'),
     ).toMatchInlineSnapshot(`
       [
         "node 14",
@@ -130,7 +145,7 @@ describe('transformSyntaxToBrowserslist', () => {
 
   test('combined', () => {
     expect(
-      transformSyntaxToBrowserslist(['Chrome 123', 'es5']),
+      transformSyntaxToBrowserslist(['Chrome 123', 'es5'], 'web'),
     ).toMatchInlineSnapshot(`
       [
         "Chrome 123",
@@ -145,8 +160,8 @@ describe('transformSyntaxToBrowserslist', () => {
       ]
     `);
 
-    expect(transformSyntaxToBrowserslist(['es5'])).toEqual(
-      transformSyntaxToBrowserslist('es5'),
+    expect(transformSyntaxToBrowserslist(['es5'], 'web')).toEqual(
+      transformSyntaxToBrowserslist('es5', 'web'),
     );
   });
 });
diff --git a/packages/core/tests/tsconfig.json b/packages/core/tests/tsconfig.json
new file mode 100644
index 000000000..947f4992f
--- /dev/null
+++ b/packages/core/tests/tsconfig.json
@@ -0,0 +1,6 @@
+{
+  "extends": "@rslib/tsconfig/base",
+  "include": ["."],
+  "exclude": ["**/node_modules"],
+  "references": []
+}
diff --git a/tests/integration/async-chunks/index.test.ts b/tests/integration/async-chunks/index.test.ts
index d1e1e4fd3..574180377 100644
--- a/tests/integration/async-chunks/index.test.ts
+++ b/tests/integration/async-chunks/index.test.ts
@@ -6,7 +6,7 @@ test('should get correct value from async chunks', async () => {
   const fixturePath = join(__dirname, 'default');
   const { entryFiles } = await buildAndGetResults({ fixturePath });
 
-  for (const format of ['esm', 'cjs']) {
+  for (const format of ['esm', 'cjs'] as const) {
     const { foo } = await import(entryFiles[format]);
     expect(await foo()).toBe('dynamic');
   }
diff --git a/tests/package.json b/tests/package.json
index 1f6bc2fe5..a3417aba3 100644
--- a/tests/package.json
+++ b/tests/package.json
@@ -4,7 +4,8 @@
   "type": "module",
   "scripts": {
     "test:benchmark": "vitest bench",
-    "test:e2e": "playwright test --pass-with-no-tests"
+    "test:e2e": "playwright test --pass-with-no-tests",
+    "type-check": "tsc --noEmit"
   },
   "dependencies": {
     "react": "^19.0.0",
diff --git a/tests/tsconfig.json b/tests/tsconfig.json
index b4aba8d72..6e2a2e939 100644
--- a/tests/tsconfig.json
+++ b/tests/tsconfig.json
@@ -2,15 +2,17 @@
   "extends": "@rslib/tsconfig/base",
   "compilerOptions": {
     "noEmit": true,
-    "composite": true
+    "composite": true,
+    "allowJs": true
   },
   "include": [
     "e2e/**/*.ts",
-    "integration/**/*.ts",
+    "integration/**/**.test.ts",
+    "integration/**/rslib.config.ts",
+    "integration/**/rslib.config.js",
     "benchmark/**/*.ts",
     "playwright.config.ts",
-    "scripts",
-    "integration/shims/cjs/src/ok.cjs"
+    "scripts"
   ],
   "exclude": ["**/node_modules", "**/.*/"],
   "references": [