Fixed #16905 -- Added extensible checks (nee validation) framework

This is the result of Christopher Medrela's 2013 Summer of Code project.

Thanks also to Preston Holmes, Tim Graham, Anssi Kääriäinen, Florian
Apolloner, and Alex Gaynor for review notes along the way.

Also: Fixes #8579, fixes #3055, fixes #19844.

1 files changed, 4 insertions, 1 deletions

diff --git a/tests/test_runner/tests.py b/tests/test_runner/tests.py
index 2066181c67..0d026971fe 100644
--- a/tests/test_runner/tests.py
+++ b/tests/test_runner/tests.py
@@ -12,7 +12,7 @@ from django.core.management import call_command
 from django import db
 from django.test import runner, TestCase, TransactionTestCase, skipUnlessDBFeature
 from django.test.testcases import connections_support_transactions
-from django.test.utils import IgnoreAllDeprecationWarningsMixin
+from django.test.utils import IgnoreAllDeprecationWarningsMixin, override_system_checks
 
 from admin_scripts.tests import AdminScriptTestCase
 from .models import Person
@@ -245,6 +245,9 @@ 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):