Python tests are no separate stage in the CI

Slightly changed yarn cov command

.gitlab-ci.yml

@@ -35,11 +35,6 @@ test_js:
   stage: test
   script: yarn test:js
 
-test_py:
-  <<: *python_packages
-  stage: test
-  script: yarn test:py
-
 lint_js:
   <<: *node_modules
   stage: test
@@ -53,7 +48,7 @@ lint_py:
   allow_failure: true
   script:
     - yarn lint:py
-    
+
 cov:
   <<: *python_packages
   stage: test

package.json

@@ -17,7 +17,7 @@
     "migrate:dev": "ZESJE_SETTINGS=$(pwd)/zesje.dev.cfg FLASK_APP=zesje/__init__.py flask db upgrade",
     "migrate": "FLASK_APP=zesje/__init__.py flask db upgrade",
     "prepare-migration": "ZESJE_SETTINGS=$(pwd)/zesje.dev.cfg FLASK_APP=zesje/__init__.py flask db migrate",
-    "cov": "python -m pytest --cov=zesje --cov-report=xml:cov.xml --cov-report=html:cov.html --cov-report=term tests/",
+    "cov": "python3 -m pytest -v -W error::RuntimeWarning --cov=zesje --cov-report=xml:cov.xml --cov-report=html:cov.html --cov-report=term tests/",
     "migrate-down": "FLASK_APP=zesje/__init__.py flask db downgrade"
   },
   "standard": {