A federal appeals court has overturned a class certification in a case brought by Domino’s Pizza delivery drivers over tips.

On February 4, the U.S. Court of Appeals for the Eighth Circuit’s reversed a ruling by Judge Donovan Frank of the District of Minnesota and remanded the case. At issue in Luiken v. Domino’s Pizza LLC was Domino’s delivery charge, which began at $1 per-delivery in Minnesota in 2005 and increased to $1.50 in 2008.