diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 42fd2819..fb3be40a 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -45,3 +45,29 @@ jobs:
 
       - name: Test
         run: npm run test
+
+  coverage:
+    runs-on: ubuntu-latest
+    name: Report coverage to Codecov
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+
+      - uses: actions/setup-node@v2
+        with:
+          node-version: '16'
+
+      - name: Setup
+        run: npm i -g pnpm
+
+      - name: Install
+        run: pnpm i
+
+      - name: Build
+        run: npm run build
+
+      - name: Coverage test
+        run: npm run test:coverage
+
+      - name: Upload coverage to Codecov # https://github.com/codecov/codecov-action
+        uses: codecov/codecov-action@v1
diff --git a/.gitignore b/.gitignore
index cf2f7015..a2e04d27 100644
--- a/.gitignore
+++ b/.gitignore
@@ -105,4 +105,5 @@ dist
 
 #
 lib/
-temp/
\ No newline at end of file
+temp/
+coverage/
\ No newline at end of file
diff --git a/README.md b/README.md
index 93ef0ce2..15553d58 100644
--- a/README.md
+++ b/README.md
@@ -2,7 +2,8 @@
 
 A Vite plugin that runs TypeScript, VLS, vue-tsc and other checkers in worker thread.
 
-![npm version](https://img.shields.io/npm/v/vite-plugin-checker) ![downloads/month](https://img.shields.io/npm/dm/vite-plugin-checker) [![Unit Test](https://github.com/fi3ework/vite-plugin-checker/actions/workflows/ci.yml/badge.svg)](https://github.com/fi3ework/vite-plugin-checker/actions/workflows/ci.yml)
+[![npm version](https://img.shields.io/npm/v/vite-plugin-checker)](https://www.npmjs.com/package/vite-plugin-checker) [![downloads/month](https://img.shields.io/npm/dm/vite-plugin-checker)](https://www.npmtrends.com/vite-plugin-checker) [![Unit Test](https://github.com/fi3ework/vite-plugin-checker/actions/workflows/ci.yml/badge.svg)](https://github.com/fi3ework/vite-plugin-checker/actions/workflows/ci.yml)
+![codecov](https://codecov.io/gh/fi3ework/vite-plugin-checker/branch/master/graph/badge.svg)
 
 ## Features
 
diff --git a/jest.config.js b/jest.config.js
index 21a652f1..a1ee7e10 100644
--- a/jest.config.js
+++ b/jest.config.js
@@ -5,6 +5,8 @@ module.exports = {
   globalTeardown: './scripts/jestGlobalTeardown.js',
   setupFilesAfterEnv: ['./scripts/jestPerTestSetup.ts'],
   testTimeout: process.env.CI ? 60000 : 60000,
+  collectCoverage: true,
+  collectCoverageFrom: ['packages/*/src/**/*.ts'],
   transform: {
     '^.+\\.ts$': 'ts-jest',
   },
diff --git a/package.json b/package.json
index 598b0dd3..4efb37e9 100644
--- a/package.json
+++ b/package.json
@@ -5,7 +5,8 @@
     "dev": "pnpm -r --filter ./packages --parallel run dev",
     "build": "pnpm -r --filter ./packages run build",
     "lint": "eslint --ext .js,.ts packages/*/src/**",
-    "test": "jest --runInBand",
+    "test": "jest --runInBand --coverage=false",
+    "test:coverage": "jest --runInBand",
     "changelog": "pnpm -r --filter ./packages run changelog",
     "test:watch": "jest -w",
     "type-check": "pnpm -r --parallel --filter ./packages exec -- tsc --noEmit -p tsconfig.build.json",