'manage.py validate reports an error on a non-existent app in INSTALLED_APPS'

def test_nonexistent_app(self):

    self.write_settings(u'settings.py', apps=[u'admin_scriptz.broken_app'], sdict={u'USE_I18N': False})
    args = [u'validate']
    (out, err) = self.run_manage(args)
    self.assertNoOutput(out)
    self.assertOutput(err, u'No    module    named')
    self.assertOutput(err, u'admin_scriptz')
