A former Winston & Strawn partner who is suing the firm for alleged gender bias urged the U.S. Supreme Court on Wednesday to uphold a California state court ruling that kept her claims in court and out of arbitration.

Constance Ramos, represented by Karla Gilbride of Public Justice, sued the law firm in California state court, claiming discrimination, retaliation, wrongful termination and anti-fair-pay practices. She alleged she was unfairly passed over for work and effectively forced out of the law firm. Ramos now works at her own firm, Akira IP.