a trial run

a trial run

COMMON A trial run is something that you do to practise before you do it at a more important time. They will use their match with the highly-rated Saracens forwards on Wednesday as a trial run for what awaits them on February 26.
See also: run, trial

a ˌtrial ˈrun

a first try at doing something, to test it or for practice: Take the car for a trial run before you buy it.
See also: run, trial