Lawyers for Winston & Strawn pressed their argument at the U.S. Supreme Court on Tuesday that a former partner should be forced to make her discrimination and retaliation claims through a confidential arbitration proceeding and not in court.

The former San Francisco-based partner, Constance Ramos, sued Winston & Strawn in California state court for allegedly passing her over for work and effectively forcing her out of the firm. Ramos, who now works at her own firm, Akira IP, defeated Winston & Strawn’s drive to keep her claims out of court.