diff --git a/.github/workflows/test_and_release.yml b/.github/workflows/test_and_release.yml
index 5c938dd..5fb5deb 100644
--- a/.github/workflows/test_and_release.yml
+++ b/.github/workflows/test_and_release.yml
@@ -72,7 +72,7 @@ jobs:
   release:
     name: Release to PyPI
     runs-on: ubuntu-latest
-    if: github.ref == 'master'
+    if: github.ref == 'refs/heads/master'
     needs:
       - test-python
       - test-r