How to test 500.html error page in django development env?

In Django 1.6 django.views.generic.simple.direct_to_template does not exists anymore, these are my settings for special views:

# urls.py

from django.views.generic import TemplateView
from django.views.defaults import page_not_found, server_error

urlpatterns += [
    url(r'^400/$', TemplateView.as_view(template_name='400.html')),
    url(r'^403/$', TemplateView.as_view(template_name='403.html')),
    url(r'^404/$', page_not_found),
    url(r'^500/$', server_error),
]

I prefer not to turn DEBUG off. Instead I put the following snippet in the urls.py:

if settings.DEBUG:
    urlpatterns += patterns('',
        (r'^500/$', 'your_custom_view_if_you_wrote_one'),
        (r'^404/$', 'django.views.generic.simple.direct_to_template', {'template': '404.html'}),
    )

In the snippet above, the error page uses a custom view, you can easily replace it with Django's direct_to_template view though.

Now you can test 500 and 404 pages by calling their urls: http://example.com/500 and http://example.com/404