diff --git a/tests/admin_utils/test_logentry.py b/tests/admin_utils/test_logentry.py
index 1442c8f2c3..77983730af 100644
--- a/tests/admin_utils/test_logentry.py
+++ b/tests/admin_utils/test_logentry.py
@@ -17,7 +17,7 @@ from django.utils.html import escape
 from .models import Article, ArticleProxy, Site
 
 
-@override_settings(ROOT_URLCONF="admin_utils.urls")
+@override_settings(ROOT_URLCONF='admin_utils.urls')
 class LogEntryTests(TestCase):
     def setUp(self):
         self.user = User.objects.create_superuser(username='super', password='secret', email='super@example.com')
diff --git a/tests/admin_widgets/tests.py b/tests/admin_widgets/tests.py
index 4d47179c37..3258fdbba1 100644
--- a/tests/admin_widgets/tests.py
+++ b/tests/admin_widgets/tests.py
@@ -795,8 +795,7 @@ class DateTimePickerSeleniumIETests(DateTimePickerSeleniumFirefoxTests):
 
 
 @skipIf(pytz is None, "this test requires pytz")
-@override_settings(TIME_ZONE='Asia/Singapore')
-@override_settings(ROOT_URLCONF='admin_widgets.urls')
+@override_settings(ROOT_URLCONF='admin_widgets.urls', TIME_ZONE='Asia/Singapore')
 class DateTimePickerShortcutsSeleniumFirefoxTests(SeleniumDataMixin, AdminSeleniumWebDriverTestCase):
     available_apps = ['admin_widgets'] + AdminSeleniumWebDriverTestCase.available_apps
     webdriver_class = 'selenium.webdriver.firefox.webdriver.WebDriver'
diff --git a/tests/generic_inline_admin/tests.py b/tests/generic_inline_admin/tests.py
index 4bf352ebac..0b35bb506d 100644
--- a/tests/generic_inline_admin/tests.py
+++ b/tests/generic_inline_admin/tests.py
@@ -380,7 +380,7 @@ class GenericInlineAdminWithUniqueTogetherTest(TestDataMixin, TestCase):
         self.assertContains(response, 'Are you sure you want to delete')
 
 
-@override_settings(ROOT_URLCONF="generic_inline_admin.urls")
+@override_settings(ROOT_URLCONF='generic_inline_admin.urls')
 class NoInlineDeletionTest(SimpleTestCase):
 
     def test_no_deletion(self):
@@ -402,7 +402,7 @@ request = MockRequest()
 request.user = MockSuperUser()
 
 
-@override_settings(ROOT_URLCONF="generic_inline_admin.urls")
+@override_settings(ROOT_URLCONF='generic_inline_admin.urls')
 class GenericInlineModelAdminTest(SimpleTestCase):
 
     def setUp(self):
diff --git a/tests/view_tests/tests/test_csrf.py b/tests/view_tests/tests/test_csrf.py
index f595652978..4b21e59034 100644
--- a/tests/view_tests/tests/test_csrf.py
+++ b/tests/view_tests/tests/test_csrf.py
@@ -6,7 +6,7 @@ from django.utils.translation import override
 from django.views.csrf import CSRF_FAILURE_TEMPLATE_NAME, csrf_failure
 
 
-@override_settings(ROOT_URLCONF="view_tests.urls")
+@override_settings(ROOT_URLCONF='view_tests.urls')
 class CsrfViewTests(SimpleTestCase):
 
     def setUp(self):
diff --git a/tests/view_tests/tests/test_debug.py b/tests/view_tests/tests/test_debug.py
index 58d3216e9b..7b9f0b5ffb 100644
--- a/tests/view_tests/tests/test_debug.py
+++ b/tests/view_tests/tests/test_debug.py
@@ -56,7 +56,7 @@ class CallableSettingWrapperTests(SimpleTestCase):
         self.assertEqual(actual, "repr from the wrapped callable")
 
 
-@override_settings(DEBUG=True, ROOT_URLCONF="view_tests.urls")
+@override_settings(DEBUG=True, ROOT_URLCONF='view_tests.urls')
 class DebugViewTests(LoggingCaptureMixin, SimpleTestCase):
 
     def test_files(self):
@@ -225,7 +225,7 @@ class DebugViewQueriesAllowedTests(SimpleTestCase):
 
 @override_settings(
     DEBUG=True,
-    ROOT_URLCONF="view_tests.urls",
+    ROOT_URLCONF='view_tests.urls',
     # No template directories are configured, so no templates will be found.
     TEMPLATES=[{
         'BACKEND': 'django.template.backends.dummy.TemplateStrings',
diff --git a/tests/wsgi/tests.py b/tests/wsgi/tests.py
index ea7112a03d..4056ffda84 100644
--- a/tests/wsgi/tests.py
+++ b/tests/wsgi/tests.py
@@ -12,7 +12,7 @@ from django.test.client import RequestFactory
 from django.utils import six
 
 
-@override_settings(ROOT_URLCONF="wsgi.urls")
+@override_settings(ROOT_URLCONF='wsgi.urls')
 class WSGITest(TestCase):
 
     def setUp(self):