old_contents: from experiments.urls import urlpatterns
  from django.conf.urls import include, url
  from django.contrib import admin
  
  
  urlpatterns += [
      url(r'^admin/', include(admin.site.urls)),
  ]
  
new_contents: from experiments.urls import urlpatterns
  from django.conf.urls import url
  from django.contrib import admin
  
  
  urlpatterns += [
      url(r'^admin/', admin.site.urls),
  ]
  
subject: Fix test with django2