diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index c6971a4..436dcb2 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -16,7 +16,12 @@ jobs:
     - uses: actions/setup-go@v2
       with:
         go-version: ${{ matrix.version }}
-    - uses: actions/checkout@v2
+    - if: ${{ github.event_name == 'pull_request_target' }}
+      uses: actions/checkout@v2
+      with:
+        ref: ${{ format('refs/pull/{0}/merge', github.event.number) }}
+    - if: ${{ github.event_name == 'push' }}
+      uses: actions/checkout@v2
     - run: ./scripts/run-tests.sh
   automerge:
     needs: test