diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index b8236717..cf846d8b 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -11,6 +11,8 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v4
+      with:
+        ref: ${{ github.event.pull_request.head.sha }}
     - run: npm ci && npm run build
     - run: npm test