Originally Posted by
Cloudee
No, you are not the pilot in command when conducting a flight review, the instructor is.
I concur. So if the instructor is clearly waiving an expectation that you need to demonstrate a run up, either live with it, or if you are really concerned about your safety, cancel the flight.
Arguing the toss with another crewmember on any flight is bad CRM. Asserting your authority is only valid when you are the PIC or being formally checked (as opposed to 'reviewed') and even then sometimes requires flexibility.