Apple has been granted the necessary permits to test self-driving cars in California, Business Insider reports. Apple’s autonomous vehicle project has been the company’s biggest open secret for years, but on Friday the California DMV added Apple’s name to a list featuring 29 other companies testing self-driving cars. “The permit covers three vehicles, all 2015 Lexus RX450h, and six drivers,” a DMV spokeswoman said, backing up previous reports that Apple is now focused more on the self-driving component than in building its own vehicle from the ground up. Apple declined to comment on the story in its usual fashion, pointing to its previous statement that it is “investing heavily in machine learning and autonomous systems.”