Removed unneeded override_system_checks

Refs #23685.

django/contrib/gis/tests/gis_migrations/test_commands.py

@@ -3,8 +3,7 @@ from __future__ import unicode_literals
 from django.core.management import call_command
 from django.db import connection
 from django.test import (
-    override_settings, override_system_checks, skipUnlessDBFeature,
-    TransactionTestCase
+    override_settings, skipUnlessDBFeature, TransactionTestCase
 )
 
 
@@ -27,7 +26,6 @@ class MigrateTests(TransactionTestCase):
         with connection.cursor() as cursor:
             self.assertNotIn(table, connection.introspection.table_names(cursor))
 
-    @override_system_checks([])
     @override_settings(MIGRATION_MODULES={"gis": "django.contrib.gis.tests.gis_migrations.migrations"})
     def test_migrate_gis(self):
         """

tests/fixtures_model_package/tests.py

@@ -5,7 +5,6 @@ import warnings
 from django.core import management
 from django.db import transaction
 from django.test import TestCase, TransactionTestCase
-from django.test.utils import override_system_checks
 from django.utils.six import StringIO
 
 from .models import Article, Book
@@ -31,7 +30,6 @@ class TestNoInitialDataLoading(TransactionTestCase):
 
     available_apps = ['fixtures_model_package']
 
-    @override_system_checks([])
     def test_migrate(self):
         with transaction.atomic():
             Book.objects.all().delete()
@@ -43,7 +41,6 @@ class TestNoInitialDataLoading(TransactionTestCase):
             )
             self.assertQuerysetEqual(Book.objects.all(), [])
 
-    @override_system_checks([])
     def test_flush(self):
         # Test presence of fixture (flush called by TransactionTestCase)
         self.assertQuerysetEqual(

tests/migrate_signals/tests.py

@@ -2,7 +2,6 @@ from django.apps import apps
 from django.core import management
 from django.db.models import signals
 from django.test import TestCase
-from django.test.utils import override_system_checks
 from django.utils import six
 
 
@@ -62,9 +61,6 @@ class MigrateSignalTests(TestCase):
     def test_pre_migrate_call_time(self):
         self.assertEqual(pre_migrate_receiver.call_counter, 1)
 
-    # `auth` app is imported, but not installed in this test, so we need to
-    # exclude checks registered by this app.
-    @override_system_checks([])
     def test_pre_migrate_args(self):
         r = PreMigrateReceiver()
         signals.pre_migrate.connect(r, sender=APP_CONFIG)

tests/proxy_model_inheritance/tests.py

@@ -4,7 +4,7 @@ import os
 
 from django.core.management import call_command
 from django.test import TestCase, TransactionTestCase
-from django.test.utils import override_system_checks, extend_sys_path
+from django.test.utils import extend_sys_path
 from django.utils._os import upath
 
 from .models import (ConcreteModel, ConcreteModelSubclass,
@@ -19,9 +19,6 @@ class ProxyModelInheritanceTests(TransactionTestCase):
     """
     available_apps = []
 
-    # `auth` app is imported, but not installed in this test, so we need to
-    # exclude checks registered by this app.
-    @override_system_checks([])
     def test_table_exists(self):
         with extend_sys_path(os.path.dirname(os.path.abspath(upath(__file__)))):
             with self.modify_settings(INSTALLED_APPS={'append': ['app1', 'app2']}):

tests/test_runner/tests.py

@@ -11,7 +11,6 @@ from django.core.management import call_command
 from django.db.backends.dummy.base import DatabaseCreation
 from django.test import runner, TestCase, TransactionTestCase, skipUnlessDBFeature
 from django.test.testcases import connections_support_transactions
-from django.test.utils import override_system_checks
 from django.utils import six
 
 from admin_scripts.tests import AdminScriptTestCase
@@ -225,9 +224,6 @@ class Sqlite3InMemoryTestDbs(TestCase):
 
     available_apps = []
 
-    # `setup_databases` triggers system check framework, but we do not want to
-    # perform checks.
-    @override_system_checks([])
     @unittest.skipUnless(all(db.connections[conn].vendor == 'sqlite' for conn in db.connections),
                          "This is an sqlite-specific issue")
     def test_transaction_support(self):