Seven California teachers have filed a class action to claw back union fees that were collected, they claim, in violation of their constitutional rights.

The suit, filed on Monday in U.S. District Court for the Central District of California, is among the first filed since the U.S. Supreme Court’s June 27 decision in Janus v. AFSCME. In a 5-4 ruling, the Supreme Court struck down fees used to cover collective bargaining costs after finding they unconstitutionally violated the First Amendment rights of the plaintiffs, nonunion members who disagreed with the union’s political views.