diff --git a/.github/workflows/python-test.yaml b/.github/workflows/python-test.yaml
index 26b95cb..5e5ef7f 100644
--- a/.github/workflows/python-test.yaml
+++ b/.github/workflows/python-test.yaml
@@ -29,6 +29,8 @@ jobs:
     steps:
       - name: "Checkout repository"
         uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
+        with:
+          ref: ${{ github.event.pull_request.head.sha }}
 
       - name: "Setup Python"
         uses: actions/setup-python@65d7f2d534ac1bc67fcd62888c5f4f3d2cb2b236 # v4.7.1