put somebody/something through their/its paces
put (one) through (one's) paces
To thoroughly test or examine one so as to evaluate one's worth, ability, or functionality. I hope you're prepared for a lot of testing at your interview—the company really puts applicants through their paces, to make sure they can handle the stress of the job.
put somebody/something through their/its ˈpacestest somebody’s/something’s ability to do something by making them/it show how well they/it can actually perform certain actions, tasks, etc: We watched the trainer putting the police dog through its paces. ♢ They’re putting the new machinery through its paces.
These expressions refer to judging the performance of a horse before deciding to buy it.
put (someone) through (someone's) paces
To cause to demonstrate ability or skill; test: The drama coach put her students through their paces before the first performance.