staticfiles_urlpatterns looks for files in MEDIA_ROOT, not STATIC_ROOT

[dramon@…]

In new project I set this:
MEDIA_ROOT = '/someprj/media/'
MEDIA_URL = '/media/'
STATIC_ROOT = '/someprj/static/'
STATIC_URL = '/static/'
STATICFILES_FINDERS = (
#    'django.contrib.staticfiles.finders.FileSystemFinder',
#    'django.contrib.staticfiles.finders.AppDirectoriesFinder',
    'django.contrib.staticfiles.finders.DefaultStorageFinder',
)

In urls.py I added at the end:
urlpatterns += staticfiles_urlpatterns()

In directory /someprj/static/ exists file test.txt
When I try to access this file on http://localhost:8000/static/test.txt error page is returned.
When a copy this file to /someprj/media/, Django shows it.

[Jannis Leidel]

This works as expected; see ​https://docs.djangoproject.com/en/dev/ref/contrib/staticfiles/#staticfiles-finders for

STATIC_ROOT is the location the collectstatic management command deploys file to, not collects from.

The DefaultStorageFinder finder is simply a helper to include the files stored by the default storage backend (which is used for file uploads).