diff --git a/.github/workflows/pytest.yml b/.github/workflows/pytest.yml
index d357dd2..408c82d 100644
--- a/.github/workflows/pytest.yml
+++ b/.github/workflows/pytest.yml
@@ -37,6 +37,7 @@ jobs:
         run: |
           $CONDA/bin/pytest --cov=sporco --cov-report=xml
       - name: Upload coverage to codecov
+        if: matrix.os == 'ubuntu-latest'
         uses: codecov/codecov-action@v2
         with:
           env_vars: OS,PYTHON