Winston & Strawn on Monday lost its bid in the U.S. Supreme Court to stop a California state ruling that allowed a former partner to bring discrimination and retaliation claims in court against the law firm.

The former San Francisco-based partner, Constance Ramos, has resisted Winston & Strawn’s push to keep her claims from being aired in public court. A California state appeals court last year set aside an arbitration provision in the firm’s employment contract, a ruling the firm challenged in the high court.