diff --git a/.github/workflows/validation.yml b/.github/workflows/validation.yml
index c5dd5964a..259be4388 100644
--- a/.github/workflows/validation.yml
+++ b/.github/workflows/validation.yml
@@ -46,5 +46,5 @@ jobs:
 
             - run: npm test
               env:
-                  PULL_REQUEST: ${{ github.event.pull_request.number || false }} # false if not a PR
+                  PULL_REQUEST: ${{ github.event_name == 'pull_request' }}
                   MODIFIED_FILES: ${{ env.MODIFIED_FILES }}