Define the `urlpatterns` as a list of `url()....

tests/browsable_api/auth_urls.py

@@ -5,6 +5,6 @@ from .views import MockView
 
 
 urlpatterns = [
-    (r'^$', MockView.as_view()),
+    url(r'^$', MockView.as_view()),
     url(r'^auth/', include('rest_framework.urls', namespace='rest_framework')),
 ]

tests/browsable_api/no_auth_urls.py

 from __future__ import unicode_literals
 
+from django.conf.urls import url
 from .views import MockView
 
 urlpatterns = [
-    (r'^$', MockView.as_view()),
+    url(r'^$', MockView.as_view()),
 ]

tests/test_authentication.py

@@ -38,11 +38,11 @@ class MockView(APIView):
 
 
 urlpatterns = [
-    (r'^session/$', MockView.as_view(authentication_classes=[SessionAuthentication])),
-    (r'^basic/$', MockView.as_view(authentication_classes=[BasicAuthentication])),
-    (r'^token/$', MockView.as_view(authentication_classes=[TokenAuthentication])),
-    (r'^auth-token/$', 'rest_framework.authtoken.views.obtain_auth_token'),
-    url(r'^auth/', include('rest_framework.urls', namespace='rest_framework'))
+    url(r'^session/$', MockView.as_view(authentication_classes=[SessionAuthentication])),
+    url(r'^basic/$', MockView.as_view(authentication_classes=[BasicAuthentication])),
+    url(r'^token/$', MockView.as_view(authentication_classes=[TokenAuthentication])),
+    url(r'^auth-token/$', 'rest_framework.authtoken.views.obtain_auth_token'),
+    url(r'^auth/', include('rest_framework.urls', namespace='rest_framework')),
 ]
 
 

tests/test_request.py

@@ -2,6 +2,7 @@
 Tests for content parsing, and form-overloaded content parsing.
 """
 from __future__ import unicode_literals
+from django.conf.urls import url
 from django.contrib.auth.models import User
 from django.contrib.auth import authenticate, login, logout
 from django.contrib.sessions.middleware import SessionMiddleware
@@ -189,7 +190,7 @@ class MockView(APIView):
         return Response(status=status.HTTP_500_INTERNAL_SERVER_ERROR)
 
 urlpatterns = [
-    (r'^$', MockView.as_view()),
+    url(r'^$', MockView.as_view()),
 ]