A federal appellate court has found that the worker-friendly standard that the California Supreme Court laid out last year for when workers should be classified as employees rather than independent contractors applies retroactively.

The U.S. Court of Appeals for the Ninth Circuit on Thursday found that the three-part test California’s high court outlined in its Dynamex Operations West v. Superior Court opinion last April applies in a case brought by janitorial workers pursuing claims against Jan-Pro International Franchising Inc. The decision revives a case that U.S. District Judge William Alsup in San Francisco knocked out on summary judgment before the California Supreme Court’s decision in Dynamex.