put somebody on their mettle

put (one) on (one's) mettle

To put someone in a situation in which they must prove their worth, skill, or ability. Being promoted to general manager at such a young age is certainly going to put her on her mettle. Our goal is to put each of these athletes on their mettle and earn their spot on the team.
See also: mettle, on, put

put somebody on their ˈmettle

make somebody do the best work they can, or perform as well as they can: The school inspection is going to put the teachers on their mettle.
See also: mettle, on, put, somebody
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