ensure tox run with poetry env

Author: 03bennej

.github/workflows/tests.yml

@@ -48,7 +48,7 @@ jobs:
           pip install tox tox-gh-actions
 
       - name: Test with tox
-        run: tox
+        run: poetry run tox
 
       - name: Upload coverage reports to Codecov
         uses: codecov/[email protected]