trial run
nounUK /ˈtraɪəl rʌn/
US /ˈtraɪəl rʌn/
A trial run is a first try at doing something to see if it works.
We did a trial run of the school play before the real show.
RELATED WORDS
OTHER MEANINGS
2. A short test of a machine or vehicle before using it for real.
The engineers took the new car for a trial run on the track.
3. A first attempt at a new activity to see if it suits you.
She had a trial run at the bakery job for a week.
4. A practice session that mimics the real event.
The team held a trial run of the ceremony the day before.