The U.S. Court of Appeals for the Fifth Circuit has upheld a National Labor Relations Board decision holding that In-N-Out Burger is in violation of labor law for banning its employees from wearing pins to show solidarity with a movement to raise the minimum wage.

The case involves an In-N-Out Burger restaurant in Austin where in 2015 employees started wearing small “Fight for $15” pins on their uniforms in support of a national movement advocating for a higher minimum wage, the right to form a union without intimidation, and other improvements for low-wage workers.