diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 5800408c2..2913d6f48 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -22,6 +22,9 @@ jobs:
       run: uv pip install --system -e .[test]
     - name: Test
       run: coverage run --source=./dpgen -m unittest -v && coverage report
+      env:
+        # https://github.com/materialsproject/pymatgen/issues/4243#issuecomment-2573310051
+        CI: ""
     - uses: codecov/codecov-action@v5
       env:
         CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}