diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 2f121537..81392e5c 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -101,7 +101,7 @@ jobs:
     needs: [code_style, rule_linter]
     # do not run on forks, because:
     # with the exception of GITHUB_TOKEN, secrets are not passed to the runner when a workflow is triggered from a forked repository.
-    if: "! github.event.pull_request.head.repo.fork"
+    if: github.event.pull_request.head.repo.full_name == github.repository
     strategy:
       fail-fast: false
       matrix: