diff --git a/.changeset/young-seals-train.md b/.changeset/young-seals-train.md
new file mode 100644
index 0000000000..048920de7e
--- /dev/null
+++ b/.changeset/young-seals-train.md
@@ -0,0 +1,5 @@
+---
+"@lynx-js/test-environment": minor
+---
+
+Switch to ESM package format by setting `"type": "module"`.
diff --git a/packages/testing-library/test-environment/package.json b/packages/testing-library/test-environment/package.json
index 9447b0b51a..f899154167 100644
--- a/packages/testing-library/test-environment/package.json
+++ b/packages/testing-library/test-environment/package.json
@@ -17,23 +17,31 @@
     "name": "Yiming Li",
     "email": "yimingli.cs@gmail.com"
   },
+  "type": "module",
   "exports": {
     ".": {
-      "default": "./dist/index.mjs",
       "types": "./dist/index.d.ts",
-      "import": "./dist/index.mjs",
-      "require": "./dist/index.js"
+      "import": "./dist/index.js",
+      "require": "./dist/index.cjs",
+      "default": "./dist/index.js"
     },
     "./env/vitest": {
-      "default": "./dist/env/vitest/index.mjs",
       "types": "./dist/env/vitest/index.d.ts",
-      "import": "./dist/env/vitest/index.mjs",
-      "require": "./dist/env/vitest/index.js"
+      "import": "./dist/env/vitest/index.js",
+      "require": "./dist/env/vitest/index.cjs",
+      "default": "./dist/env/vitest/index.js"
     }
   },
-  "main": "./dist/index.js",
-  "module": "./dist/index.mjs",
+  "main": "./dist/index.cjs",
+  "module": "./dist/index.js",
   "types": "./dist/index.d.ts",
+  "typesVersions": {
+    "*": {
+      "env/vitest": [
+        "./dist/env/vitest/index.d.ts"
+      ]
+    }
+  },
   "files": [
     "dist"
   ],
@@ -44,6 +52,7 @@
   },
   "devDependencies": {
     "@testing-library/jest-dom": "^6.6.3",
-    "@types/jsdom": "^21.1.7"
+    "@types/jsdom": "^21.1.7",
+    "rsbuild-plugin-publint": "0.3.1"
   }
 }
diff --git a/packages/testing-library/test-environment/rslib.config.ts b/packages/testing-library/test-environment/rslib.config.ts
index aaf377d7a0..63873106a0 100644
--- a/packages/testing-library/test-environment/rslib.config.ts
+++ b/packages/testing-library/test-environment/rslib.config.ts
@@ -1,4 +1,5 @@
 import { defineConfig } from '@rslib/core';
+import { pluginPublint } from 'rsbuild-plugin-publint';
 
 export default defineConfig({
   source: {
@@ -22,4 +23,7 @@ export default defineConfig({
       syntax: 'es2021',
     },
   ],
+  plugins: [
+    pluginPublint(),
+  ],
 });
diff --git a/packages/testing-library/test-environment/src/index.ts b/packages/testing-library/test-environment/src/index.ts
index d0eb8349ba..c3aac013a8 100644
--- a/packages/testing-library/test-environment/src/index.ts
+++ b/packages/testing-library/test-environment/src/index.ts
@@ -7,11 +7,11 @@
 
 import EventEmitter from 'events';
 import { JSDOM } from 'jsdom';
-import { createGlobalThis, LynxGlobalThis } from './lynx/GlobalThis';
-import { initElementTree } from './lynx/ElementPAPI';
-export { initElementTree } from './lynx/ElementPAPI';
-export type { LynxElement } from './lynx/ElementPAPI';
-export type { LynxGlobalThis } from './lynx/GlobalThis';
+import { createGlobalThis, LynxGlobalThis } from './lynx/GlobalThis.js';
+import { initElementTree } from './lynx/ElementPAPI.js';
+export { initElementTree } from './lynx/ElementPAPI.js';
+export type { LynxElement } from './lynx/ElementPAPI.js';
+export type { LynxGlobalThis } from './lynx/GlobalThis.js';
 /**
  * @public
  * The lynx element tree
diff --git a/packages/testing-library/test-environment/src/lynx/GlobalThis.ts b/packages/testing-library/test-environment/src/lynx/GlobalThis.ts
index b7210dba4b..7c3f05af5b 100644
--- a/packages/testing-library/test-environment/src/lynx/GlobalThis.ts
+++ b/packages/testing-library/test-environment/src/lynx/GlobalThis.ts
@@ -1,4 +1,4 @@
-import { define } from '../util';
+import { define } from '../util.js';
 
 function installOwnProperties(globalThis: any) {
   define(globalThis, {
diff --git a/packages/testing-library/test-environment/turbo.json b/packages/testing-library/test-environment/turbo.json
index 3b4189eea4..6c031d7435 100644
--- a/packages/testing-library/test-environment/turbo.json
+++ b/packages/testing-library/test-environment/turbo.json
@@ -9,6 +9,12 @@
       "cache": false
     },
     "build": {
+      "dependsOn": [],
+      "inputs": [
+        "src/**",
+        "!src/**/__tests__/**",
+        "rslib.config.ts"
+      ],
       "outputs": ["dist/**"]
     }
   }
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index e5f1457482..d0c39e3b03 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -588,6 +588,9 @@ importers:
       '@types/jsdom':
         specifier: ^21.1.7
         version: 21.1.7
+      rsbuild-plugin-publint:
+        specifier: 0.3.1
+        version: 0.3.1(@rsbuild/core@1.3.15)
 
   packages/third-party/tailwind-preset:
     devDependencies: