diff --git a/.github/workflows/checks.yml b/.github/workflows/checks.yml
index ffc6ce8..8bdedfa 100644
--- a/.github/workflows/checks.yml
+++ b/.github/workflows/checks.yml
@@ -50,10 +50,11 @@ jobs:
         run: |
           coverage run --source foca -m pytest -W ignore::DeprecationWarning
           coverage xml
-      - name: Submit Report to Codecov
-        uses: codecov/codecov-action@v3
+      - name: Upload coverage to Codecov
+        uses: codecov/codecov-action@v4
         with:
           token: ${{ secrets.CODECOV_TOKEN }}
+          flags: test_unit
           files: ./coverage.xml
           fail_ci_if_error: true
           verbose: true