old_contents: from django.conf.urls import url
  from rest_framework.urlpatterns import format_suffix_patterns
  from .views import (ObtainEmailCallbackToken,
                      ObtainMobileCallbackToken,
                      ObtainAuthTokenFromCallbackToken,
                      VerifyAliasFromCallbackToken,
                      ObtainEmailVerificationCallbackToken,
                      ObtainMobileVerificationCallbackToken,
                      )
  
  urlpatterns = [url(r'^callback/auth/$', ObtainAuthTokenFromCallbackToken.as_view(), name='auth_callback'),
                 url(r'^auth/email/$', ObtainEmailCallbackToken.as_view(), name='auth_email'),
                 url(r'^auth/mobile/$', ObtainMobileCallbackToken.as_view(), name='auth_mobile'),
                 url(r'^callback/verify/$', VerifyAliasFromCallbackToken.as_view(), name='verify_callback'),
                 url(r'^verify/email/$', ObtainEmailVerificationCallbackToken.as_view(), name='verify_email'),
                 url(r'^verify/mobile/$', ObtainMobileVerificationCallbackToken.as_view(), name='verify_mobile')]
  
  
new_contents: from django.conf.urls import url
  from .views import (ObtainEmailCallbackToken,
                      ObtainMobileCallbackToken,
                      ObtainAuthTokenFromCallbackToken,
                      VerifyAliasFromCallbackToken,
                      ObtainEmailVerificationCallbackToken,
                      ObtainMobileVerificationCallbackToken,
                      )
  
  urlpatterns = [url(r'^callback/auth/$', ObtainAuthTokenFromCallbackToken.as_view(), name='auth_callback'),
                 url(r'^auth/email/$', ObtainEmailCallbackToken.as_view(), name='auth_email'),
                 url(r'^auth/mobile/$', ObtainMobileCallbackToken.as_view(), name='auth_mobile'),
                 url(r'^callback/verify/$', VerifyAliasFromCallbackToken.as_view(), name='verify_callback'),
                 url(r'^verify/email/$', ObtainEmailVerificationCallbackToken.as_view(), name='verify_email'),
                 url(r'^verify/mobile/$', ObtainMobileVerificationCallbackToken.as_view(), name='verify_mobile')]
  
subject: Fix tests