diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index 822c4fa2..fcb1f361 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -56,7 +56,7 @@ jobs:
       - name: Upload coverage data
         uses: actions/upload-artifact@v4
         with:
-          name: coverage-data
+          name: coverage-data-${{ matrix.os }}-${{ matrix.python-version }}
           path: .coverage.*
           if-no-files-found: ignore
       - name: Run tests (minimum versions)
@@ -124,7 +124,8 @@ jobs:
       - name: Download coverage data
         uses: actions/download-artifact@v4
         with:
-          name: coverage-data
+          pattern: coverage-data-*
+          merge-multiple: true
       - name: Install nox
         run: pipx install nox uv
       - name: Produce coverage report