diff --git a/.github/workflows/js-unittest.yml b/.github/workflows/js-unittest.yml
index daaab10..0d746b9 100644
--- a/.github/workflows/js-unittest.yml
+++ b/.github/workflows/js-unittest.yml
@@ -22,8 +22,8 @@ jobs:
             - name: Checkout
               uses: actions/checkout@v3
             - name: Install dependencies
-              run: sudo npm install
+              run: npm install
             - name: Start local http server
-              run: sudo npm run http-server &
-            - name: Run tests
-              run: sudo npm test
+              run: npm run http-server &
+            - name: Run tests with coverage
+              run: npm run coverage
diff --git a/.gitignore b/.gitignore
index ea296b8..7dd6a0b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,4 +1,6 @@
 **/.devcontainer/*
 **/node_modules/*
 **/package-lock.json
-**/*.vscode/*
\ No newline at end of file
+**/.vscode/*
+**/.nyc_output/*
+**/coverage/*
\ No newline at end of file
diff --git a/package.json b/package.json
index 719337f..44dc522 100644
--- a/package.json
+++ b/package.json
@@ -4,6 +4,7 @@
 	"type": "module",
 	"scripts": {
 		"test": "mocha --recursive --require mock-local-storage './{,!(node_modules)/**}/*.test.js'",
+		"coverage": "c8 --check-coverage --lines 90 --functions 90 --branches 90 npm run test",
 		"lint-js": "eslint **/*.js",
 		"fix-js": "eslint --fix **/*.js",
 		"lint-html": "htmlhint **/*.html",
@@ -15,6 +16,7 @@
 		"js-doc": "jsdoc -d source/docs/ -r source/"
 	},
 	"devDependencies": {
+		"c8": "^7.12.0",
 		"eslint": "^8.27.0",
 		"htmlhint": "1.1.4",
 		"http-server": "",