diff --git a/.github/workflows/checks.yml b/.github/workflows/checks.yml
index e8519241f..02a8dafee 100644
--- a/.github/workflows/checks.yml
+++ b/.github/workflows/checks.yml
@@ -8,6 +8,8 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
+        with:
+          ref: ${{ github.head_ref }}
       - uses: borales/actions-yarn@v2.0.0
         with:
           cmd: install