diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 9fa93a9..fe7155b 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -16,9 +16,14 @@ jobs:
 
     steps:
       - uses: actions/checkout@v3
-      - name: Use Node.js ${{ matrix.node-version }}
+      - name: use node@${{ matrix.node-version }}
         uses: actions/setup-node@v3
         with:
           node-version: ${{ matrix.node-version }}
       - run: npm install
       - run: npm test
+      - run: npm run test:coverage
+      - name: codecov
+        uses: codecov/codecov-action@v3
+        env:
+          CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}
diff --git a/README.md b/README.md
index dbded79..3b06da2 100644
--- a/README.md
+++ b/README.md
@@ -66,6 +66,7 @@ dotenv-expand is your tool.
 [![NPM version](https://img.shields.io/npm/v/dotenv-expand.svg?style=flat-square)](https://www.npmjs.com/package/dotenv-expand)
 [![js-standard-style](https://img.shields.io/badge/code%20style-standard-brightgreen.svg?style=flat-square)](https://github.com/feross/standard)
 [![Featured on Openbase](https://badges.openbase.com/js/featured/dotenv-expand.svg?token=BGZJQVRDGu24cWu/F8LIrCmZvIhC1yUc03IUkk9/sUM=)](https://openbase.com/js/dotenv-expand?utm_source=embedded&utm_medium=badge&utm_campaign=rate-badge)
+[![codecov](https://codecov.io/gh/motdotla/dotenv-expand/graph/badge.svg?token=pawWEyaMfg)](https://codecov.io/gh/motdotla/dotenv-expand)
 
 ## Install
 
diff --git a/package.json b/package.json
index c85fcf6..04bbb8a 100644
--- a/package.json
+++ b/package.json
@@ -19,6 +19,7 @@
     "lint": "standard",
     "pretest": "npm run lint && npm run dts-check",
     "test": "tap tests/*.js --100 -Rspec",
+    "test:coverage": "tap --coverage-report=lcov",
     "prerelease": "npm test",
     "release": "standard-version"
   },