The U.S. Supreme Court’s pro-arbitration trend appears intact after oral arguments Monday in a key case asking whether it should be courts or arbitrators themselves who rule on the enforceability of an arbitration agreement.

Consumer groups say the outcome of the case, Rent-A-Center, West v. Jackson, could determine whether courts have any role in overseeing arbitration clauses in labor agreements, which they see as biased toward employers. Business groups, for their part, don’t want courts second-guessing what they see as validly agreed-upon arbitration agreements.