The US Supreme Court has declined to hear the appeal of insurance agents claiming they are misclassified as independent contractors, the Wisconsin State Journal reported.

The insurance agents were appealing a Sixth Circuit decision handed down in January that overturned a lower court’s ruling in the agents’ favor. The class-action case included some 7,200 current and former agents for Madison, Wisconsin-based American Family Insurance Co. The case could have cost American Family more than $1 billion, according to some estimates, though the company disputed that figure.

The case, Jammal v. American Family Insurance Co., was originally filed in 2013 by four former American Family agents who were seeking protections under the Employee Retirement Income Security Act.