diff --git a/.github/workflows/test.yaml b/.github/workflows/test.yaml
index 0bd76e8..0257009 100644
--- a/.github/workflows/test.yaml
+++ b/.github/workflows/test.yaml
@@ -86,7 +86,9 @@ jobs:
           uvx hatch run ${{ matrix.env.name }}:cov-report   # report visibly
           uvx hatch run ${{ matrix.env.name }}:coverage xml # create report for upload
       - name: Upload coverage
-        uses: codecov/codecov-action@v5
+        uses: codecov/codecov-action@v6
+        with:
+          fail_ci_if_error: true
 
   # Check that all tests defined above pass. This makes it easy to set a single "required" test in branch
   # protection instead of having to update it frequently. See https://github.com/re-actors/alls-green#why.