diff --git a/.github/workflows/pr-receive.yml b/.github/workflows/pr-receive.yml
index c8be38ea..316b58a5 100644
--- a/.github/workflows/pr-receive.yml
+++ b/.github/workflows/pr-receive.yml
@@ -16,6 +16,7 @@ jobs:
         run: |
           mkdir -p ./pr
           echo ${{ github.event.number }} > ./pr/NR
+          echo ${{ github.event.pull_request.head.sha }} > ./pr/SHA
       - uses: actions/upload-artifact@v2
         with:
           name: pr
diff --git a/.github/workflows/pr-test.yml b/.github/workflows/pr-test.yml
index e9eb0472..c89825f0 100644
--- a/.github/workflows/pr-test.yml
+++ b/.github/workflows/pr-test.yml
@@ -38,7 +38,14 @@ jobs:
       - name: "Unzip"
         run: |
           unzip pr.zip
-          ls -l
+          cat NR
+          cat SHA
+          echo HEAD=$(cat SHA) >> $GITHUB_ENV
+
+      - name: Checkout pull request HEAD commit
+        uses: actions/checkout@v2
+        with:
+          ref: ${{ env.HEAD }}
 
       - name: "Comment on PR"
         uses: actions/github-script@v3