diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 428253b..8e8e430 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -21,6 +21,8 @@ jobs:
     runs-on: ${{ matrix.os.image }}
     steps:
       - uses: actions/checkout@v2.3.5
+        with:
+          fetch-depth: 0
 
       - uses: cachix/install-nix-action@v17
         with: