After Seattle became one of the first US cities to adopt a minimum wage law aiming to reach $15 per hour, five franchises and the International Franchise Association sued the city. The group says that the new law is discriminatory against them because the law treats the 623 franchises in Seattle like big businesses just because they are part of a multi state network.

The Seattle law is the first of such laws to reach the US Supreme Court, but the courts decided on Monday that it will not hear the case.

Labor advocates say that the court’s move is a sign that SCOTUS will continue to refrain from hearing challenges to similar laws from other cities.