diff --git a/.github/workflows/mr_ci.yml b/.github/workflows/mr_ci.yml
index 5eb806c8..45bc6af4 100644
--- a/.github/workflows/mr_ci.yml
+++ b/.github/workflows/mr_ci.yml
@@ -31,6 +31,7 @@ jobs:
       - name: Install dependencies
         run: |
           python -m pip install ".[dev]"
+          python -m pip install pytest-cov
 
       - name: Quality Assurance
         run: |
@@ -41,4 +42,15 @@ jobs:
 
       - name: Test with pytest
         run: |
-          python -m pytest ./tests
+          python -m pytest --cov=./ --cov-report=xml ./tests
+
+      - name: Upload coverage to Codecov
+        uses: codecov/codecov-action@v3
+        with:
+          token: ${{ secrets.CODECOV_TOKEN }}
+          directory: ./coverage/reports/
+          env_vars: OS,PYTHON
+          fail_ci_if_error: true
+          files: ./coverage.xml,!./cache
+          flags: unittests
+          name: codecov-umbrella