diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index cd8005e..629219c 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -5,6 +5,7 @@ jobs:
     runs-on: ubuntu-latest
     name: Test the action
     steps:
+    - uses: actions/checkout@v2
     - name: Setup PDM
       uses: ./
       with: