Don't use external libraries when running tests

.gitlab-ci.yml

@@ -14,7 +14,7 @@ py39:
   stage: test
   image: python:3.9-alpine
   before_script:
-    - apk add --no-cache gcc libmagic
+    - apk add --no-cache libmagic
     - pip install tox --no-cache-dir
   script: tox -e py39
 

tfjm/settings.py

@@ -68,7 +68,7 @@ INSTALLED_APPS = [
     'participation',
 ]
 
-if "test" not in sys.argv:  # pragma: no cover
+if "test" not in sys.argv and not "makemigrations" in sys.argv:  # pragma: no cover
     INSTALLED_APPS += [
         'cas_server',
         'django_extensions',