Updated test URL patterns to use path() and re_path().

tests/auth_tests/urls_admin.py

@@ -2,11 +2,11 @@
 Test URLs for auth admins.
 """
 
-from django.conf.urls import url
 from django.contrib import admin
 from django.contrib.auth.admin import GroupAdmin, UserAdmin
 from django.contrib.auth.models import Group, User
 from django.contrib.auth.urls import urlpatterns
+from django.urls import path
 
 # Create a silo'd admin site for just the user/group admins.
 site = admin.AdminSite(name='auth_test_admin')
@@ -14,5 +14,5 @@ site.register(User, UserAdmin)
 site.register(Group, GroupAdmin)
 
 urlpatterns += [
-    url(r'^admin/', site.urls),
+    path('admin/', site.urls),
 ]