Test pilot and Test driver

Test pilot noun - A pilot hired to fly experimental airplanes through maneuvers designed to test them.

Test driver and test pilot are semantically related. in aircraft tester topic. In some cases you can use "Test driver" instead a noun phrase "Test pilot".

Test driver noun - A driver who drives a motor vehicle to evaluate its performance.

Test pilot and test driver are semantically related. Sometimes you can replace phrase "Test pilot" with "Test driver", this phrases are similar.