diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 9ac8d77..08f0341 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -29,6 +29,7 @@ jobs:
         path: |
           nd_hall_with_lar_tms_sand.gdml
           anti_fiducial_nd_hall_with_lar_tms_sand.gdml
+        if-no-files-found: error
   check_overlaps:
     name: Check geometry for overlaps
     runs-on: ubuntu-latest