diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 86d1896..aec821f 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -13,6 +13,9 @@ jobs:
       # permissions required for nix caching to work properly
       id-token: write
       contents: read
+    defaults:
+      run:
+        shell: devenv shell bash -- -e {0}
     steps:
       - uses: actions/checkout@v4