diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 8d70d4d4..af313c7c 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -14,7 +14,8 @@ jobs:
     steps:
       - uses: actions/checkout@v4
         with:
-          ref: ${{ github.head_ref || github.ref_name }}
+          ref: ${{ github.event.pull_request.head.sha || github.ref }}
+          repository: ${{ github.event.pull_request.head.repo.full_name || github.repository }}
           fetch-depth: 1
  
       - name: "Fail on type: ignore (no suppressions allowed)"