diff --git a/.github/workflows/pytest-workflow.yml b/.github/workflows/pytest-workflow.yml
index c53602c9..ee294e30 100644
--- a/.github/workflows/pytest-workflow.yml
+++ b/.github/workflows/pytest-workflow.yml
@@ -18,7 +18,7 @@ jobs:
     runs-on: ubuntu-latest
     name: CI Test
     needs: changes
-    if: needs.changes.outputs.modules == 'true'
+    if: needs.changes.outputs.modules != '[]'
     strategy:
       matrix:
         nxf_version: ['20.11.0-edge']