Install coverage

.github/workflows/python-tests.yml

@@ -11,7 +11,7 @@ on: [push, pull_request]
 #     # Run everyday at 03:53 UTC
 #     - cron: 53 3 * * *
 #  workflow_dispatch:
-  
+
 jobs:
   build:
 
@@ -33,7 +33,7 @@ jobs:
         sudo apt install ffmpeg
         ffmpeg -version
     - name: Install Tox
-      run: python -m pip install tox tox-gh-actions
+      run: python -m pip install tox tox-gh-actions coverage
     - name: Run Tox
       run: tox
     - name: Convert coverage