test run

b :  an order or mandatory process in writing issued in the name of the sovereign or of a court or judicial officer commanding the person to whom it is directed to perform or refrain from performing an act specified therein <writ of detinue> <writ of entry> <writ of execution>c :  the power and authority of the issuer of such a written order —usually used with run<outside the United States where … our writ does not run — Dean Acheson>