diff --git a/rest_framework/compat.py b/rest_framework/compat.py
index e435618a2..7a0aea3db 100644
--- a/rest_framework/compat.py
+++ b/rest_framework/compat.py
@@ -58,6 +58,23 @@ def distinct(queryset, base):
     return queryset.distinct()
 
 
+def get_names_and_managers(options):
+    if django.VERSION >= (1, 10):
+        # Django 1.10 onwards provides a `.managers` property on the Options.
+        return [
+            (manager.name, manager)
+            for manager
+            in options.managers
+        ]
+    # For Django 1.8 and 1.9, use the three-tuple information provided
+    # by .concrete_managers and .abstract_managers
+    return [
+        (manager_info[1], manager_info[2])
+        for manager_info
+        in (options.concrete_managers + options.abstract_managers)
+    ]
+
+
 # contrib.postgres only supported from 1.8 onwards.
 try:
     from django.contrib.postgres import fields as postgres_fields
diff --git a/rest_framework/renderers.py b/rest_framework/renderers.py
index 63e0d836f..264f7ac3b 100644
--- a/rest_framework/renderers.py
+++ b/rest_framework/renderers.py
@@ -635,6 +635,7 @@ class BrowsableAPIRenderer(BaseRenderer):
             'view': view,
             'request': request,
             'response': response,
+            'user': request.user,
             'description': self.get_description(view, response.status_code),
             'name': self.get_name(view),
             'version': VERSION,
diff --git a/rest_framework/urlpatterns.py b/rest_framework/urlpatterns.py
index 5347b3bc1..7a02bb0f0 100644
--- a/rest_framework/urlpatterns.py
+++ b/rest_framework/urlpatterns.py
@@ -24,7 +24,7 @@ def apply_suffix_patterns(urlpatterns, suffix_pattern, suffix_required):
         else:
             # Regular URL pattern
             regex = urlpattern.regex.pattern.rstrip('$').rstrip('/') + suffix_pattern
-            view = urlpattern._callback or urlpattern._callback_str
+            view = urlpattern.callback
             kwargs = urlpattern.default_args
             name = urlpattern.name
             # Add in both the existing and the new urlpattern
diff --git a/rest_framework/utils/representation.py b/rest_framework/utils/representation.py
index 49f829c10..32e6d246a 100644
--- a/rest_framework/utils/representation.py
+++ b/rest_framework/utils/representation.py
@@ -10,15 +10,15 @@ from django.db import models
 from django.utils.encoding import force_text
 from django.utils.functional import Promise
 
-from rest_framework.compat import unicode_repr
+from rest_framework.compat import get_names_and_managers, unicode_repr
 
 
 def manager_repr(value):
     model = value.model
     opts = model._meta
-    for _, name, manager in opts.concrete_managers + opts.abstract_managers:
-        if manager == value:
-            return '%s.%s.all()' % (model._meta.object_name, name)
+    for manager_name, manager_instance in get_names_and_managers(opts):
+        if manager_instance == value:
+            return '%s.%s.all()' % (model._meta.object_name, manager_name)
     return repr(value)
 
 
diff --git a/runtests.py b/runtests.py
index a7e8b45a9..1627e33b2 100755
--- a/runtests.py
+++ b/runtests.py
@@ -14,7 +14,7 @@ PYTEST_ARGS = {
 
 FLAKE8_ARGS = ['rest_framework', 'tests', '--ignore=E501']
 
-ISORT_ARGS = ['--recursive', '--check-only', 'rest_framework', 'tests']
+ISORT_ARGS = ['--recursive', '--check-only', '-p', 'tests', 'rest_framework', 'tests']
 
 sys.path.append(os.path.dirname(__file__))
 
diff --git a/tests/browsable_api/test_browsable_api.py b/tests/browsable_api/test_browsable_api.py
index 153b4c189..3d49c353b 100644
--- a/tests/browsable_api/test_browsable_api.py
+++ b/tests/browsable_api/test_browsable_api.py
@@ -1,16 +1,14 @@
 from __future__ import unicode_literals
 
 from django.contrib.auth.models import User
-from django.test import TestCase
+from django.test import TestCase, override_settings
 
 from rest_framework.test import APIClient
 
 
+@override_settings(ROOT_URLCONF='tests.browsable_api.auth_urls')
 class DropdownWithAuthTests(TestCase):
     """Tests correct dropdown behaviour with Auth views enabled."""
-
-    urls = 'tests.browsable_api.auth_urls'
-
     def setUp(self):
         self.client = APIClient(enforce_csrf_checks=True)
         self.username = 'john'
@@ -40,11 +38,9 @@ class DropdownWithAuthTests(TestCase):
         self.assertContains(response, '>Log in<')
 
 
+@override_settings(ROOT_URLCONF='tests.browsable_api.no_auth_urls')
 class NoDropdownWithoutAuthTests(TestCase):
     """Tests correct dropdown behaviour with Auth views NOT enabled."""
-
-    urls = 'tests.browsable_api.no_auth_urls'
-
     def setUp(self):
         self.client = APIClient(enforce_csrf_checks=True)
         self.username = 'john'
diff --git a/tests/browsable_api/views.py b/tests/browsable_api/views.py
index cd020cd32..03758f10b 100644
--- a/tests/browsable_api/views.py
+++ b/tests/browsable_api/views.py
@@ -6,9 +6,8 @@ from rest_framework.views import APIView
 
 
 class MockView(APIView):
-
     authentication_classes = (authentication.SessionAuthentication,)
-    renderer_classes = (renderers.BrowsableAPIRenderer,)
+    renderer_classes = (renderers.BrowsableAPIRenderer, renderers.JSONRenderer)
 
     def get(self, request):
         return Response({'a': 1, 'b': 2, 'c': 3})
diff --git a/tests/conftest.py b/tests/conftest.py
index 03b4e3285..a5123b9d8 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -3,18 +3,24 @@ def pytest_configure():
 
     settings.configure(
         DEBUG_PROPAGATE_EXCEPTIONS=True,
-        DATABASES={'default': {'ENGINE': 'django.db.backends.sqlite3',
-                               'NAME': ':memory:'}},
+        DATABASES={
+            'default': {
+                'ENGINE': 'django.db.backends.sqlite3',
+                'NAME': ':memory:'
+            }
+        },
         SITE_ID=1,
         SECRET_KEY='not very secret in tests',
         USE_I18N=True,
         USE_L10N=True,
         STATIC_URL='/static/',
         ROOT_URLCONF='tests.urls',
-        TEMPLATE_LOADERS=(
-            'django.template.loaders.filesystem.Loader',
-            'django.template.loaders.app_directories.Loader',
-        ),
+        TEMPLATES=[
+            {
+                'BACKEND': 'django.template.backends.django.DjangoTemplates',
+                'APP_DIRS': True,
+            },
+        ],
         MIDDLEWARE_CLASSES=(
             'django.middleware.common.CommonMiddleware',
             'django.contrib.sessions.middleware.SessionMiddleware',
@@ -27,7 +33,6 @@ def pytest_configure():
             'django.contrib.sessions',
             'django.contrib.sites',
             'django.contrib.staticfiles',
-
             'rest_framework',
             'rest_framework.authtoken',
             'tests',
diff --git a/tests/models.py b/tests/models.py
index cde5f8cda..85143566e 100644
--- a/tests/models.py
+++ b/tests/models.py
@@ -27,9 +27,6 @@ class BasicModel(RESTFrameworkModel):
 class BaseFilterableItem(RESTFrameworkModel):
     text = models.CharField(max_length=100)
 
-    class Meta:
-        abstract = True
-
 
 class FilterableItem(BaseFilterableItem):
     decimal = models.DecimalField(max_digits=4, decimal_places=2)
diff --git a/tests/test_authentication.py b/tests/test_authentication.py
index e7d2dd421..b6377f6e8 100644
--- a/tests/test_authentication.py
+++ b/tests/test_authentication.py
@@ -8,7 +8,7 @@ from django.conf.urls import include, url
 from django.contrib.auth.models import User
 from django.db import models
 from django.http import HttpResponse
-from django.test import TestCase
+from django.test import TestCase, override_settings
 from django.utils import six
 
 from rest_framework import (
@@ -19,6 +19,7 @@ from rest_framework.authentication import (
     TokenAuthentication
 )
 from rest_framework.authtoken.models import Token
+from rest_framework.authtoken.views import obtain_auth_token
 from rest_framework.response import Response
 from rest_framework.test import APIClient, APIRequestFactory
 from rest_framework.views import APIView
@@ -75,15 +76,14 @@ urlpatterns = [
             authentication_classes=[CustomKeywordTokenAuthentication]
         )
     ),
-    url(r'^auth-token/$', 'rest_framework.authtoken.views.obtain_auth_token'),
+    url(r'^auth-token/$', obtain_auth_token),
     url(r'^auth/', include('rest_framework.urls', namespace='rest_framework')),
 ]
 
 
+@override_settings(ROOT_URLCONF='tests.test_authentication')
 class BasicAuthTests(TestCase):
     """Basic authentication"""
-    urls = 'tests.test_authentication'
-
     def setUp(self):
         self.csrf_client = APIClient(enforce_csrf_checks=True)
         self.username = 'john'
@@ -151,10 +151,9 @@ class BasicAuthTests(TestCase):
         self.assertEqual(response['WWW-Authenticate'], 'Basic realm="api"')
 
 
+@override_settings(ROOT_URLCONF='tests.test_authentication')
 class SessionAuthTests(TestCase):
     """User session authentication"""
-    urls = 'tests.test_authentication'
-
     def setUp(self):
         self.csrf_client = APIClient(enforce_csrf_checks=True)
         self.non_csrf_client = APIClient(enforce_csrf_checks=False)
@@ -223,7 +222,6 @@ class SessionAuthTests(TestCase):
 
 class BaseTokenAuthTests(object):
     """Token authentication"""
-    urls = 'tests.test_authentication'
     model = None
     path = None
     header_prefix = 'Token '
@@ -311,6 +309,7 @@ class BaseTokenAuthTests(object):
         self.assertEqual(response.status_code, status.HTTP_401_UNAUTHORIZED)
 
 
+@override_settings(ROOT_URLCONF='tests.test_authentication')
 class TokenAuthTests(BaseTokenAuthTests, TestCase):
     model = Token
     path = '/token/'
@@ -367,11 +366,13 @@ class TokenAuthTests(BaseTokenAuthTests, TestCase):
         self.assertEqual(response.data['token'], self.key)
 
 
+@override_settings(ROOT_URLCONF='tests.test_authentication')
 class CustomTokenAuthTests(BaseTokenAuthTests, TestCase):
     model = CustomToken
     path = '/customtoken/'
 
 
+@override_settings(ROOT_URLCONF='tests.test_authentication')
 class CustomKeywordTokenAuthTests(BaseTokenAuthTests, TestCase):
     model = Token
     path = '/customkeywordtoken/'
diff --git a/tests/test_filters.py b/tests/test_filters.py
index 8493c96af..fd71764f7 100644
--- a/tests/test_filters.py
+++ b/tests/test_filters.py
@@ -274,12 +274,11 @@ class IntegrationTestFiltering(CommonFilteringTestCase):
         self.assertEqual(response.status_code, status.HTTP_200_OK)
 
 
+@override_settings(ROOT_URLCONF='tests.test_filters')
 class IntegrationTestDetailFiltering(CommonFilteringTestCase):
     """
     Integration tests for filtered detail views.
     """
-    urls = 'tests.test_filters'
-
     def _get_url(self, item):
         return reverse('detail-view', kwargs=dict(pk=item.pk))
 
diff --git a/tests/test_htmlrenderer.py b/tests/test_htmlrenderer.py
index 01ef46d35..3dfe6ef74 100644
--- a/tests/test_htmlrenderer.py
+++ b/tests/test_htmlrenderer.py
@@ -5,7 +5,7 @@ from django.conf.urls import url
 from django.core.exceptions import PermissionDenied
 from django.http import Http404
 from django.template import Template, TemplateDoesNotExist
-from django.test import TestCase
+from django.test import TestCase, override_settings
 from django.utils import six
 
 from rest_framework import status
@@ -43,9 +43,8 @@ urlpatterns = [
 ]
 
 
+@override_settings(ROOT_URLCONF='tests.test_htmlrenderer')
 class TemplateHTMLRendererTests(TestCase):
-    urls = 'tests.test_htmlrenderer'
-
     def setUp(self):
         """
         Monkeypatch get_template
@@ -89,9 +88,8 @@ class TemplateHTMLRendererTests(TestCase):
         self.assertEqual(response['Content-Type'], 'text/html; charset=utf-8')
 
 
+@override_settings(ROOT_URLCONF='tests.test_htmlrenderer')
 class TemplateHTMLRendererExceptionTests(TestCase):
-    urls = 'tests.test_htmlrenderer'
-
     def setUp(self):
         """
         Monkeypatch get_template
diff --git a/tests/test_middleware.py b/tests/test_middleware.py
index 49124da61..a9f620c0e 100644
--- a/tests/test_middleware.py
+++ b/tests/test_middleware.py
@@ -1,6 +1,6 @@
-
 from django.conf.urls import url
 from django.contrib.auth.models import User
+from django.test import override_settings
 
 from rest_framework.authentication import TokenAuthentication
 from rest_framework.authtoken.models import Token
@@ -20,10 +20,8 @@ class MyMiddleware(object):
         return response
 
 
+@override_settings(ROOT_URLCONF='tests.test_middleware')
 class TestMiddleware(APITestCase):
-
-    urls = 'tests.test_middleware'
-
     def test_middleware_can_access_user_when_processing_response(self):
         user = User.objects.create_user('john', 'john@example.com', 'password')
         key = 'abcd1234'
diff --git a/tests/test_relations_hyperlink.py b/tests/test_relations_hyperlink.py
index c0642eda2..05d8689a3 100644
--- a/tests/test_relations_hyperlink.py
+++ b/tests/test_relations_hyperlink.py
@@ -1,7 +1,7 @@
 from __future__ import unicode_literals
 
 from django.conf.urls import url
-from django.test import TestCase
+from django.test import TestCase, override_settings
 
 from rest_framework import serializers
 from rest_framework.test import APIRequestFactory
@@ -71,10 +71,8 @@ class NullableOneToOneTargetSerializer(serializers.HyperlinkedModelSerializer):
 
 
 # TODO: Add test that .data cannot be accessed prior to .is_valid
-
+@override_settings(ROOT_URLCONF='tests.test_relations_hyperlink')
 class HyperlinkedManyToManyTests(TestCase):
-    urls = 'tests.test_relations_hyperlink'
-
     def setUp(self):
         for idx in range(1, 4):
             target = ManyToManyTarget(name='target-%d' % idx)
@@ -188,9 +186,8 @@ class HyperlinkedManyToManyTests(TestCase):
         self.assertEqual(serializer.data, expected)
 
 
+@override_settings(ROOT_URLCONF='tests.test_relations_hyperlink')
 class HyperlinkedForeignKeyTests(TestCase):
-    urls = 'tests.test_relations_hyperlink'
-
     def setUp(self):
         target = ForeignKeyTarget(name='target-1')
         target.save()
@@ -318,9 +315,8 @@ class HyperlinkedForeignKeyTests(TestCase):
         self.assertEqual(serializer.errors, {'target': ['This field may not be null.']})
 
 
+@override_settings(ROOT_URLCONF='tests.test_relations_hyperlink')
 class HyperlinkedNullableForeignKeyTests(TestCase):
-    urls = 'tests.test_relations_hyperlink'
-
     def setUp(self):
         target = ForeignKeyTarget(name='target-1')
         target.save()
@@ -425,9 +421,8 @@ class HyperlinkedNullableForeignKeyTests(TestCase):
         self.assertEqual(serializer.data, expected)
 
 
+@override_settings(ROOT_URLCONF='tests.test_relations_hyperlink')
 class HyperlinkedNullableOneToOneTests(TestCase):
-    urls = 'tests.test_relations_hyperlink'
-
     def setUp(self):
         target = OneToOneTarget(name='target-1')
         target.save()
diff --git a/tests/test_renderers.py b/tests/test_renderers.py
index de89e50aa..5793fc734 100644
--- a/tests/test_renderers.py
+++ b/tests/test_renderers.py
@@ -8,7 +8,7 @@ from collections import MutableMapping, OrderedDict
 from django.conf.urls import include, url
 from django.core.cache import cache
 from django.db import models
-from django.test import TestCase
+from django.test import TestCase, override_settings
 from django.utils import six
 from django.utils.safestring import SafeText
 from django.utils.translation import ugettext_lazy as _
@@ -148,13 +148,11 @@ class DocumentingRendererTests(TestCase):
         self.assertContains(response, '>PATCH<')
 
 
+@override_settings(ROOT_URLCONF='tests.test_renderers')
 class RendererEndToEndTests(TestCase):
     """
     End-to-end testing of renderers using an RendererMixin on a generic view.
     """
-
-    urls = 'tests.test_renderers'
-
     def test_default_renderer_serializes_content(self):
         """If the Accept header is not set the default renderer should serialize the response."""
         resp = self.client.get('/')
@@ -397,13 +395,11 @@ class AsciiJSONRendererTests(TestCase):
 
 
 # Tests for caching issue, #346
+@override_settings(ROOT_URLCONF='tests.test_renderers')
 class CacheRenderTest(TestCase):
     """
     Tests specific to caching responses
     """
-
-    urls = 'tests.test_renderers'
-
     def test_head_caching(self):
         """
         Test caching of HEAD requests
diff --git a/tests/test_request.py b/tests/test_request.py
index 7a0575789..dee636d76 100644
--- a/tests/test_request.py
+++ b/tests/test_request.py
@@ -7,7 +7,7 @@ from django.conf.urls import url
 from django.contrib.auth import authenticate, login, logout
 from django.contrib.auth.models import User
 from django.contrib.sessions.middleware import SessionMiddleware
-from django.test import TestCase
+from django.test import TestCase, override_settings
 from django.utils import six
 
 from rest_framework import status
@@ -113,9 +113,8 @@ urlpatterns = [
 ]
 
 
+@override_settings(ROOT_URLCONF='tests.test_request')
 class TestContentParsingWithAuthentication(TestCase):
-    urls = 'tests.test_request'
-
     def setUp(self):
         self.csrf_client = APIClient(enforce_csrf_checks=True)
         self.username = 'john'
diff --git a/tests/test_response.py b/tests/test_response.py
index df2d7b4ec..c8ae6475a 100644
--- a/tests/test_response.py
+++ b/tests/test_response.py
@@ -1,7 +1,7 @@
 from __future__ import unicode_literals
 
 from django.conf.urls import include, url
-from django.test import TestCase
+from django.test import TestCase, override_settings
 from django.utils import six
 
 from rest_framework import generics, routers, serializers, status, viewsets
@@ -131,13 +131,11 @@ urlpatterns = [
 
 
 # TODO: Clean tests bellow - remove duplicates with above, better unit testing, ...
+@override_settings(ROOT_URLCONF='tests.test_response')
 class RendererIntegrationTests(TestCase):
     """
     End-to-end testing of renderers using an ResponseMixin on a generic view.
     """
-
-    urls = 'tests.test_response'
-
     def test_default_renderer_serializes_content(self):
         """If the Accept header is not set the default renderer should serialize the response."""
         resp = self.client.get('/')
@@ -201,9 +199,8 @@ class RendererIntegrationTests(TestCase):
         self.assertEqual(resp.status_code, DUMMYSTATUS)
 
 
+@override_settings(ROOT_URLCONF='tests.test_response')
 class UnsupportedMediaTypeTests(TestCase):
-    urls = 'tests.test_response'
-
     def test_should_allow_posting_json(self):
         response = self.client.post('/json', data='{"test": 123}', content_type='application/json')
 
@@ -220,12 +217,11 @@ class UnsupportedMediaTypeTests(TestCase):
         self.assertEqual(response.status_code, 415)
 
 
+@override_settings(ROOT_URLCONF='tests.test_response')
 class Issue122Tests(TestCase):
     """
     Tests that covers #122.
     """
-    urls = 'tests.test_response'
-
     def test_only_html_renderer(self):
         """
         Test if no infinite recursion occurs.
@@ -239,13 +235,11 @@ class Issue122Tests(TestCase):
         self.client.get('/html1')
 
 
+@override_settings(ROOT_URLCONF='tests.test_response')
 class Issue467Tests(TestCase):
     """
     Tests for #467
     """
-
-    urls = 'tests.test_response'
-
     def test_form_has_label_and_help_text(self):
         resp = self.client.get('/html_new_model')
         self.assertEqual(resp['Content-Type'], 'text/html; charset=utf-8')
@@ -253,13 +247,11 @@ class Issue467Tests(TestCase):
         # self.assertContains(resp, 'Text description.')
 
 
+@override_settings(ROOT_URLCONF='tests.test_response')
 class Issue807Tests(TestCase):
     """
     Covers #807
     """
-
-    urls = 'tests.test_response'
-
     def test_does_not_append_charset_by_default(self):
         """
         Renderers don't include a charset unless set explicitly.
diff --git a/tests/test_reverse.py b/tests/test_reverse.py
index c5486e5db..03d31f1f9 100644
--- a/tests/test_reverse.py
+++ b/tests/test_reverse.py
@@ -2,7 +2,7 @@ from __future__ import unicode_literals
 
 from django.conf.urls import url
 from django.core.urlresolvers import NoReverseMatch
-from django.test import TestCase
+from django.test import TestCase, override_settings
 
 from rest_framework.reverse import reverse
 from rest_framework.test import APIRequestFactory
@@ -30,12 +30,11 @@ class MockVersioningScheme(object):
         return 'http://scheme-reversed/view'
 
 
+@override_settings(ROOT_URLCONF='tests.test_reverse')
 class ReverseTests(TestCase):
     """
     Tests for fully qualified URLs when using `reverse`.
     """
-    urls = 'tests.test_reverse'
-
     def test_reversed_urls_are_fully_qualified(self):
         request = factory.get('/view')
         url = reverse('view', request=request)
diff --git a/tests/test_routers.py b/tests/test_routers.py
index ae2639bf2..acab660d8 100644
--- a/tests/test_routers.py
+++ b/tests/test_routers.py
@@ -5,7 +5,7 @@ from collections import namedtuple
 from django.conf.urls import include, url
 from django.core.exceptions import ImproperlyConfigured
 from django.db import models
-from django.test import TestCase
+from django.test import TestCase, override_settings
 
 from rest_framework import permissions, serializers, viewsets
 from rest_framework.decorators import detail_route, list_route
@@ -113,9 +113,8 @@ class TestSimpleRouter(TestCase):
                 self.assertEqual(route.mapping[method], endpoint)
 
 
+@override_settings(ROOT_URLCONF='tests.test_routers')
 class TestRootView(TestCase):
-    urls = 'tests.test_routers'
-
     def test_retrieve_namespaced_root(self):
         response = self.client.get('/namespaced/')
         self.assertEqual(
@@ -135,12 +134,11 @@ class TestRootView(TestCase):
         )
 
 
+@override_settings(ROOT_URLCONF='tests.test_routers')
 class TestCustomLookupFields(TestCase):
     """
     Ensure that custom lookup fields are correctly routed.
     """
-    urls = 'tests.test_routers'
-
     def setUp(self):
         RouterTestModel.objects.create(uuid='123', text='foo bar')
 
@@ -191,14 +189,13 @@ class TestLookupValueRegex(TestCase):
             self.assertEqual(expected[idx], self.urls[idx].regex.pattern)
 
 
+@override_settings(ROOT_URLCONF='tests.test_routers')
 class TestLookupUrlKwargs(TestCase):
     """
     Ensure the router honors lookup_url_kwarg.
 
     Setup a deep lookup_field, but map it to a simple URL kwarg.
     """
-    urls = 'tests.test_routers'
-
     def setUp(self):
         RouterTestModel.objects.create(uuid='123', text='foo bar')
 
diff --git a/tests/test_testing.py b/tests/test_testing.py
index e0bf759a4..e6c8de22d 100644
--- a/tests/test_testing.py
+++ b/tests/test_testing.py
@@ -6,7 +6,7 @@ from io import BytesIO
 from django.conf.urls import url
 from django.contrib.auth.models import User
 from django.shortcuts import redirect
-from django.test import TestCase
+from django.test import TestCase, override_settings
 
 from rest_framework.decorators import api_view
 from rest_framework.response import Response
@@ -44,9 +44,8 @@ urlpatterns = [
 ]
 
 
+@override_settings(ROOT_URLCONF='tests.test_testing')
 class TestAPITestClient(TestCase):
-    urls = 'tests.test_testing'
-
     def setUp(self):
         self.client = APIClient()
 
diff --git a/tests/test_utils.py b/tests/test_utils.py
index ca3d43061..cd6a6af9a 100644
--- a/tests/test_utils.py
+++ b/tests/test_utils.py
@@ -2,7 +2,7 @@ from __future__ import unicode_literals
 
 from django.conf.urls import url
 from django.core.exceptions import ImproperlyConfigured
-from django.test import TestCase
+from django.test import TestCase, override_settings
 from django.utils import six
 
 import rest_framework.utils.model_meta
@@ -47,12 +47,11 @@ urlpatterns = [
 ]
 
 
+@override_settings(ROOT_URLCONF='tests.test_utils')
 class BreadcrumbTests(TestCase):
     """
     Tests the breadcrumb functionality used by the HTML renderer.
     """
-    urls = 'tests.test_utils'
-
     def test_root_breadcrumbs(self):
         url = '/'
         self.assertEqual(
diff --git a/tests/test_versioning.py b/tests/test_versioning.py
index 4029e0e43..d4d8cfccb 100644
--- a/tests/test_versioning.py
+++ b/tests/test_versioning.py
@@ -1,5 +1,6 @@
 import pytest
 from django.conf.urls import include, url
+from django.test import override_settings
 
 from rest_framework import serializers, status, versioning
 from rest_framework.decorators import APIView
@@ -9,7 +10,28 @@ from rest_framework.reverse import reverse
 from rest_framework.test import APIRequestFactory, APITestCase
 from rest_framework.versioning import NamespaceVersioning
 
-from .utils import UsingURLPatterns
+
+@override_settings(ROOT_URLCONF='tests.test_versioning')
+class URLPatternsTestCase(APITestCase):
+    """
+    Isolates URL patterns used during testing on the test class itself.
+    For example:
+
+    class MyTestCase(URLPatternsTestCase):
+        urlpatterns = [
+            ...
+        ]
+
+        def test_something(self):
+            ...
+    """
+    def setUp(self):
+        global urlpatterns
+        urlpatterns = self.urlpatterns
+
+    def tearDown(self):
+        global urlpatterns
+        urlpatterns = []
 
 
 class RequestVersionView(APIView):
@@ -120,7 +142,7 @@ class TestRequestVersion:
         assert response.data == {'version': None}
 
 
-class TestURLReversing(UsingURLPatterns, APITestCase):
+class TestURLReversing(URLPatternsTestCase):
     included = [
         url(r'^namespaced/$', dummy_view, name='another'),
         url(r'^example/(?P<pk>\d+)/$', dummy_pk_view, name='example-detail')
@@ -238,7 +260,7 @@ class TestInvalidVersion:
         assert response.status_code == status.HTTP_404_NOT_FOUND
 
 
-class TestHyperlinkedRelatedField(UsingURLPatterns, APITestCase):
+class TestHyperlinkedRelatedField(URLPatternsTestCase):
     included = [
         url(r'^namespaced/(?P<pk>\d+)/$', dummy_pk_view, name='namespaced'),
     ]
@@ -270,7 +292,7 @@ class TestHyperlinkedRelatedField(UsingURLPatterns, APITestCase):
             self.field.to_internal_value('/v2/namespaced/3/')
 
 
-class TestNamespaceVersioningHyperlinkedRelatedFieldScheme(UsingURLPatterns, APITestCase):
+class TestNamespaceVersioningHyperlinkedRelatedFieldScheme(URLPatternsTestCase):
     included = [
         url(r'^namespaced/(?P<pk>\d+)/$', dummy_pk_view, name='namespaced'),
     ]
diff --git a/tests/utils.py b/tests/utils.py
index b90349967..5b2d75864 100644
--- a/tests/utils.py
+++ b/tests/utils.py
@@ -2,30 +2,6 @@ from django.core.exceptions import ObjectDoesNotExist
 from django.core.urlresolvers import NoReverseMatch
 
 
-class UsingURLPatterns(object):
-    """
-    Isolates URL patterns used during testing on the test class itself.
-    For example:
-
-    class MyTestCase(UsingURLPatterns, TestCase):
-        urlpatterns = [
-            ...
-        ]
-
-        def test_something(self):
-            ...
-    """
-    urls = __name__
-
-    def setUp(self):
-        global urlpatterns
-        urlpatterns = self.urlpatterns
-
-    def tearDown(self):
-        global urlpatterns
-        urlpatterns = []
-
-
 class MockObject(object):
     def __init__(self, **kwargs):
         self._kwargs = kwargs
diff --git a/tox.ini b/tox.ini
index 15442991e..ba500a2a0 100644
--- a/tox.ini
+++ b/tox.ini
@@ -5,8 +5,8 @@ addopts=--tb=short
 envlist =
        py27-{lint,docs},
        {py27,py32,py33,py34,py35}-django18,
-       {py27,py34,py35}-django{19}
-       {py27,py34,py35}-django{110}
+       {py27,py34,py35}-django19,
+       {py27,py34,py35}-django110
 
 [testenv]
 commands = ./runtests.py --fast {posargs} --coverage -rw
@@ -19,6 +19,12 @@ deps =
         django110: Django==1.10a1
         -rrequirements/requirements-testing.txt
         -rrequirements/requirements-optionals.txt
+basepython =
+    py35: python3.5
+    py34: python3.4
+    py33: python3.3
+    py32: python3.2
+    py27: python2.7
 
 [testenv:py27-lint]
 commands = ./runtests.py --lintonly