diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 8202dc8..4f0822d 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -283,7 +283,7 @@ jobs:
       - name: Upload coverage report
         uses: coverallsapp/github-action@v2
         with:
-          flag-name: py${{ matrix.python-version }}
+          flag-name: py${{ matrix.python-version }} - ${{ matrix.platform }}
           parallel: true
         if: success()
       - name: Setup tmate debug session