Add migrations check in tox.ini

.travis.yml

@@ -152,6 +152,8 @@ jobs:
       env: TOX_ENV=py39-djmaster-sqlite
     - python: "3.9"
       env: TOX_ENV=py39-djmaster-postgres
+    - python: "3.9"
+      env: TOX_ENV=checkmigrations
   allow_failures:
     - env: TOX_ENV=py36-djmaster-sqlite
     - env: TOX_ENV=py36-djmaster-postgres

tox.ini

@@ -32,4 +32,13 @@ setenv =
 commands =
     coverage run --append --source=admin_interface setup.py test
     coverage report -m
-    codecov
+    codecov
+
+[testenv:checkmigrations]
+passenv = CI TRAVIS TRAVIS_*
+deps =
+    -r requirements.txt
+setenv =
+    DJANGO_SETTINGS_MODULE=tests.settings
+commands =
+    django-admin makemigrations --check --pythonpath $pwd