diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 76ba15d..be6c87f 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -64,8 +64,10 @@ jobs:
       - name: Store test coverage
         uses: actions/upload-artifact@v4
         with:
-          name: coverage
+          name: coverage-data-${{ matrix.python }}
           path: .coverage.*
+          if-no-files-found: ignore
+          retention-days: 1
 
   coverage:
     name: coverage
@@ -90,7 +92,21 @@ jobs:
       - name: Retrieve test coverage
         uses: actions/download-artifact@v4
         with:
-          name: coverage
+          pattern: coverage-data-*
+          merge-multiple: true
 
       - name: Check coverage
         run: tox -e coverage
+
+      - name: ＋ Combine coverage
+        run: |
+          python -Im coverage combine
+          python -Im coverage html --skip-covered --skip-empty
+          python -Im coverage report
+          echo "## Coverage summary" >> $GITHUB_STEP_SUMMARY
+          python -Im coverage report --format=markdown >> $GITHUB_STEP_SUMMARY
+      - name: 📈 Upload HTML report
+        uses: actions/upload-artifact@v4
+        with:
+          name: html-report
+          path: htmlcov