      return Response(serializer.validated_data)
  
  
  urlpatterns = [
      url(r'^view/$', view),
      url(r'^session-view/$', session_view),
      url(r'^redirect-view/$', redirect_view),
      url(r'^post-view/$', post_view)
  ]
  
  
  @override_settings(ROOT_URLCONF='tests.test_testing')
  class TestAPITestClient(TestCase):
 
</s> remove         url(r'^$', view),
 </s> add         path('', view), </s> remove     url(r'^$', MockView.as_view()),
    url(r'^echo/$', EchoView.as_view()),
    url(r'^upload/$', FileUploadView.as_view())
 </s> add     path('', MockView.as_view()),
    path('echo/', EchoView.as_view()),
    path('upload/', FileUploadView.as_view()) </s> remove     url(
        r'^session/$',
 </s> add     path(
        'session/', </s> remove     url(r'^$', FooView.as_view())
 </s> add     path('', FooView.as_view()) </s> remove         url(r'^example/', include(notes_router.urls)),
 </s> add         path('example/', include(notes_router.urls)),
    path('view/', view),
    path('session-view/', session_view),
    path('redirect-view/', redirect_view),
    path('post-view/', post_view)
      return Response(serializer.validated_data)
  
  
  urlpatterns = [
    path('view/', view),
    path('session-view/', session_view),
    path('redirect-view/', redirect_view),
    path('post-view/', post_view)
    path('view/', view),
    path('session-view/', session_view),
    path('redirect-view/', redirect_view),
    path('post-view/', post_view)
    path('view/', view),
    path('session-view/', session_view),
    path('redirect-view/', redirect_view),
    path('post-view/', post_view)
    path('view/', view),
    path('session-view/', session_view),
    path('redirect-view/', redirect_view),
    path('post-view/', post_view)
  ]
  
  
  @override_settings(ROOT_URLCONF='tests.test_testing')
  class TestAPITestClient(TestCase):
keep keep keep keep replace replace replace replace keep keep keep keep keep
 Replace all url() calls with path() or re_path() (#7512)

* url() is deprecated in Django 3.1

* update given feedbacks on url() is deprecated in Django 3.1

* Fix test_urlpatterns.py to continue testing mixed re_path() and path()

* Fix one missed reference

Co-authored-by: sanjusci <sanju.sci9@gmail.com> 
tests/test_testing.py