diff --git a/.github/workflows/coverage.yml b/.github/workflows/coverage.yml
new file mode 100644
index 0000000..bddf36e
--- /dev/null
+++ b/.github/workflows/coverage.yml
@@ -0,0 +1,18 @@
+name: Measure test coverage
+on:
+  - push
+  - pull_request
+jobs:
+  coverage:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@1e31de5234b9f8995739874a8ce0492dc87873e2 # v4
+      - name: Use Node.js ${{ matrix.node }}
+        uses: actions/setup-node@8f152de45cc393bb48ce5d89d36b731f54556e65 # v4
+        with:
+          node-version: 22
+          registry-url: 'https://registry.npmjs.org'
+          cache: npm
+      - run: npm install
+      - run: npm run build --if-present
+      - run: npm run coverage