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