When you want to check someone's abilities or test a theory, you might use the phrase "put someone/something to the test." However, there are many synonyms that can be used instead. "Challenge" implies pushing someone to their limits. "Evaluate" is a more formal term when you want to assess performance or capabilities. "Assess" means to judge or form an opinion after careful consideration. "Probe" implies a deeper investigation or examination into someone or something. "Trial" is often used in legal contexts to test evidence or determine guilt. Finally, "experiment" suggests a scientific approach to testing something. Overall, there are many ways to express the idea of putting someone or something to the test, depending on the context and desired connotations.