diff --git a/.github/workflows/check.yml b/.github/workflows/check.yml
index c4a479d..842d279 100644
--- a/.github/workflows/check.yml
+++ b/.github/workflows/check.yml
@@ -6,8 +6,6 @@ jobs:
     steps:
       - name: Checkout
         uses: actions/checkout@v2
-        with:
-          ref: ${{ github.event.pull_request.head.ref }}
       - name: Setup Gradle
         uses: gradle/gradle-build-action@v2
       - name: Run check with Gradle Wrapper