diff --git a/.github/workflows/checks.yml b/.github/workflows/checks.yml
index 56be78630..6ff9fe1cd 100644
--- a/.github/workflows/checks.yml
+++ b/.github/workflows/checks.yml
@@ -9,8 +9,7 @@ jobs:
     steps:
       - uses: actions/checkout@v2
         with:
-          repository: ${{ github.repository }}
-          ref: ${{ github.head_ref }}
+          ref: ${{ github.event.pull_request.head.sha }}
           fetch-depth: 0
       - name: Installing dependencies
         uses: borales/actions-yarn@v2.0.0