diff --git a/.github/workflows/python-package.yml b/.github/workflows/python-package.yml
index 38938b6..17231f7 100644
--- a/.github/workflows/python-package.yml
+++ b/.github/workflows/python-package.yml
@@ -20,6 +20,9 @@ jobs:
 
     steps:
     - uses: actions/checkout@v4
+      with:
+        repository: ${{ github.event.pull_request.head.repo.full_name }}
+        ref: ${{ github.event.pull_request.head.ref }}
     - name: Set up Python ${{ matrix.python-version }}
       uses: actions/setup-python@v3
       with: