diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 10ad0795..02f17140 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -13,8 +13,15 @@ jobs:
     - uses: actions/checkout@v4
       with:
         ref: ${{ github.event.pull_request.head.sha }}
-    - run: npm ci && npm run build
+    - run: npm ci
+    - run: npm run build
     - run: npm test
+    - run: npm run test:gen-cov
+    - name: Upload coverage to CodeCov
+      uses: codecov/codecov-action@v4.0.1
+      with:
+        directory: ./coverage
+        token: ${{ secrets.CODECOV_TOKEN }}
 
   integration_test_botToken:
     runs-on: ubuntu-latest
diff --git a/.gitignore b/.gitignore
index 18995261..f50d6db0 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,3 +2,4 @@ node_modules
 .DS_Store
 .nyc_output
 dist
+coverage
diff --git a/README.md b/README.md
index 4431768f..1bf94c62 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,7 @@
 # Slack Send GitHub Action
 
+[![codecov](https://codecov.io/gh/slackapi/slack-github-action/graph/badge.svg?token=OZNX7FHN78)](https://codecov.io/gh/slackapi/slack-github-action)
+
 Send data into Slack using this GitHub Action!
 
 ## Sending Variables
diff --git a/package.json b/package.json
index 8eb1e7a6..99f94031 100644
--- a/package.json
+++ b/package.json
@@ -6,8 +6,9 @@
   "scripts": {
     "lint": "eslint .",
     "local": "act public --eventpath .github/workflows/local/event.json --secret-file .github/workflows/local/.env --platform ubuntu-latest=node:20-buster",
-    "test:mocha": "nyc mocha --config .mocharc.json test/*-test.js",
-    "test": "npm run lint && npm run test:mocha",
+    "test:mocha": "mocha --config .mocharc.json test/*-test.js",
+    "test:gen-cov": "nyc --reporter=lcov npm run test:mocha",
+    "test": "npm run lint && nyc npm run test:mocha",
     "build": "npx @vercel/ncc build src/index.js --license licenses.txt"
   },
   "repository": {