Fixed test failures introduced in refs #23861.

tests/check_framework/test_model_field_deprecation.py

@@ -2,8 +2,10 @@ from django.db import models
 from django.core import checks
 from django.test import SimpleTestCase
 
+from .tests import IsolateModelsMixin
 
-class TestDeprecatedField(SimpleTestCase):
+
+class TestDeprecatedField(IsolateModelsMixin, SimpleTestCase):
     def test_default_details(self):
         class MyField(models.Field):
             system_check_deprecated_details = {}
@@ -43,7 +45,7 @@ class TestDeprecatedField(SimpleTestCase):
         ])
 
 
-class TestRemovedField(SimpleTestCase):
+class TestRemovedField(IsolateModelsMixin, SimpleTestCase):
     def test_default_details(self):
         class MyField(models.Field):
             system_check_removed_details = {}

tests/check_framework/tests.py

@@ -291,8 +291,7 @@ class SilencingCheckTests(TestCase):
         self.assertEqual(err.getvalue(), '')
 
 
-class CheckFrameworkReservedNamesTests(TestCase):
-
+class IsolateModelsMixin(object):
     def setUp(self):
         self.current_models = apps.all_models[__package__]
         self.saved_models = set(self.current_models)
@@ -302,6 +301,8 @@ class CheckFrameworkReservedNamesTests(TestCase):
             del self.current_models[model]
         apps.clear_cache()
 
+
+class CheckFrameworkReservedNamesTests(IsolateModelsMixin, TestCase):
     @override_settings(
         SILENCED_SYSTEM_CHECKS=['models.E20', 'fields.W342'],  # ForeignKey(unique=True)
         INSTALLED_APPS=['django.contrib.auth', 'django.contrib.contenttypes', 'check_framework']