A federal judge overseeing a lawsuit against Uber Technologies on Tuesday considered the ride-sharing company’s motion to disqualify one of the plaintiff’s lawyers on the case due to his previous position litigating alongside Uber on behalf of the U.S. Chamber of Commerce.

Judge Edward Chen of the U.S. District Court for the Northern District of California said at a hearing on Uber’s motion that Warren Postman—who is now part of the Keller Lenkner team representing Diva Limousine in its suit against Uber—had a “common interest” with Uber when he previously collaborated with the company’s lawyers on the chamber’s challenge to a Seattle collective bargaining ordinance for ride-hailing drivers.