diff --git a/.github/workflows/tox.yml b/.github/workflows/tox.yml
index ff3e161..5995638 100644
--- a/.github/workflows/tox.yml
+++ b/.github/workflows/tox.yml
@@ -31,13 +31,16 @@ jobs:
     - name: Test with tox
       run: |
         pyenv="py$(echo "${{ matrix.python-version }}" | tr -d '.')"
-        tox -e ${pyenv}-test,${pyenv}-rapidjson,flake8,lint
+        tox -e ${pyenv}-test,flake8,lint
+        tox -e ${pyenv}-rapidjson -- --cov-append
     - name: Check code format with black
       if: matrix.python-version == 3.9
       run: tox -e black
     - name: Check package
       if: matrix.python-version == 3.9
       run: tox -e check_package
+    - name: Upload to coverage
+      uses: codecov/codecov-action@v1.2.1
     - name: Publish package to PyPI
       uses: pypa/gh-action-pypi-publish@master
       if: >-
diff --git a/setup.cfg b/setup.cfg
index d2b4c37..8e3f336 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -2,7 +2,7 @@
 addopts = -v --junit-xml=test-report.xml
           --doctest-modules
           --cov=riotctrl --cov-branch
-          --cov-report=term --cov-report=xml --cov-report=html
+          --cov-report=term-missing --cov-report=xml
 testpaths = riotctrl
 markers =
     rapidjson