Personally, consideration is given to such things if possible, but if not, It's no way around it.
Actually, I would apreciate a call to TWR before take off stating that it would be a test flight, and that some consideration would be grately apreciated, if at all possible.
I have no problem beeing extra helpful if there is some special kind of flight, after all: It's Air traffic
services
(yeah-yeah, I know the airspace mentioned here is a busy one
)