diff --git a/.github/workflows/test.yaml b/.github/workflows/test.yaml
index 0bfeddc..384d858 100644
--- a/.github/workflows/test.yaml
+++ b/.github/workflows/test.yaml
@@ -19,3 +19,5 @@ jobs:
     - uses: actions/checkout@v4
     - name: Check out the environment
       run: env
+    - name: Try to call cowsay via nix-shell
+      run: nix-shell -p cowsay --command "cowsay test"