'manage.py validate does not raise errors when an app imports a base class that itself has an abstract base'

def test_app_with_import(self):

    self.write_settings(u'settings.py', apps=[u'admin_scripts.app_with_import', u'django.contrib.comments', u'django.contrib.auth', u'django.contrib.contenttypes', u'django.contrib.sites'], sdict={u'DEBUG': True})
    args = [u'validate']
    (out, err) = self.run_manage(args)
    self.assertNoOutput(err)
    self.assertOutput(out, u'0    errors    found')
