diff --git a/.github/workflows/pr.yml b/.github/workflows/pr.yml
index 57f992e7..e9a119a9 100644
--- a/.github/workflows/pr.yml
+++ b/.github/workflows/pr.yml
@@ -48,6 +48,8 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
+      - name: Unshallow
+        run: git fetch --prune --unshallow
       - name: Install Go
         uses: actions/setup-go@v1
         with: