Fixed lockups in jenkins, refs #19546.

tests/regressiontests/test_runner/tests.py

@@ -283,7 +283,8 @@ class DummyBackendTest(unittest.TestCase):
 class DeprecationDisplayTest(AdminScriptTestCase):
     # tests for 19546
     def setUp(self):
-        settings = {'INSTALLED_APPS': '("regressiontests.test_runner.deprecation_app",)' }
+        settings = {'INSTALLED_APPS': '("regressiontests.test_runner.deprecation_app",)',
+                    'DATABASES': '{"default": {"ENGINE":"django.db.backends.sqlite3", "NAME":":memory:"}}' }
         self.write_settings('settings.py', sdict=settings)
 
     def tearDown(self):