diff --git a/.github/workflows/testing.yml b/.github/workflows/testing.yml
index 56c5ad02..ec35bd85 100644
--- a/.github/workflows/testing.yml
+++ b/.github/workflows/testing.yml
@@ -65,7 +65,7 @@ jobs:
           pytest --cov=kliff --cov-report=xml
 
       - uses: codecov/codecov-action@v4
-        if: matrix.python-version == "3.10" && github.repository == "openkim/kliff"
+        if: matrix.python-version == '3.10' && github.repository == 'openkim/kliff'
         with:
           token: ${{ secrets.CODECOV_TOKEN }}
           file: ./coverage.xml