LANSING — A high school sports advocacy group and some parents sued Michigan on Thursday, seeking to stop a new requirement that all teen athletes be regularly tested for the coronavirus.

The lawsuit, filed in the state Court of Claims, came on the eve of the mandate’s Friday effective date. Gov. Gretchen Whitmer and the state health department announced the free, required rapid testing nearly two weeks ago as a way to help curb the spread of COVID-19 amid a climbing case rate that is now the country’s highest.

Let Them Play Michigan, a group that successfully pushed for the resumption of contact sports following a monthslong ban, sued along with three parents of young athletes.

The suit alleges that a state order and related guidance were not issued in compliance with procedural requirements and are “arbitrary and capricious.” It also says they violate due process rights.

The order and guidance require 13- to 19-year-old athletes in contact sports to be tested — once a week if they wear a mask and up to three times weekly if face coverings cannot be worn.

Athletes who prefer not to be tested “have suffered an intangible injury from being forced to comply,” according to the suit, which also challenges contact-tracing and quarantine rules included in the guidance.