testdriver
nounUK /ˈtɛstˌdraɪvə/
US /ˈtɛstˌdraɪvər/
A testdriver is a person who drives a car to see if it works well.
The testdriver took the new car around the track to check it.
OTHER MEANINGS
2. A person whose job is to drive vehicles to find problems before they are sold.
The company hired a testdriver to try every new model.
3. A computer program that runs tests on software automatically.
The testdriver ran all the checks and found two bugs.
4. Someone who tries out a product or service to see how well it works.
As a testdriver for the app, she reported what felt confusing.