The test is a mock flight which would normally take 30+ minutes. There's no need whatsoever to cram that whole flight inside a minute - no points are awarded for finishing in record time.
So take your time: One call at a time. For instance, your request to enter controller airspace. Once that request is dealt with, just keep silent for a while. Think of your next call. What are you going to say, what is the likely response going to be. Only then make that next call, which is probably a reporting point or exit point of controlled airspace which in reality would be at least a minute flight time away. Engage brain before engaging the PTT switch. And don't worry about the examiner getting impatient.
Have pen and paper ready. Practice some shorthand notation for clearances, callsigns and such.
If the examiner throws you a curveball, sit on your hands for a few seconds while you think about how to deal with it. If you're not quite ready for it, a "standby" or "say again" is entirely appropriate. Do not react to calls that are not intended for you. Except maybe the "mayday relay" situation.
Last edited by BackPacker; 22nd May 2016 at 21:44.