Django - How to test a model is registered on the admin site

    from django.contrib import admin
    from django.test import TestCase

    from ..models import Account


    class ModelAdminTests(TestCase):

        def test_account_model_admin(self):
            '''Ensure the account is extended from model admin'''
            registry = admin.site._registry
            self.assertTrue(
                isinstance(registry[Account], admin.ModelAdmin)
            )

Source: