diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index cb5dae2..ebdedb5 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -32,7 +32,7 @@ jobs:
 
     - name: Install spack environment
       run: |
-        spack -e tests install
+        spack -e tests install --no-check-signature
 
     - name: Show spack-installed packages for debugging
       run: |