As an Examiner, I certainly do NOT 'pile on the pressure'!
The old "You do the walk round whilst I make a quick phone call" wheeze is a way of getting you to relax. I might watch from a distance though!
If you were perfect, there'd be no need for a test. You're good enough to be safe, we just need to see it.
On the first nav leg, your Examiner will be an intelligent passenger. On the second you'll get the diversion. Thereafter he/she should look after all the navigation and positioning requirements until you are required to 'take us back for some circuits'. But you'll know where you are then.
Normally takes about 2 1/2 hours. Don't forget 'Check One' - use the bathroom before the flight!
Best of luck to you all - but in reality you won't need any luck as there'll be nothing new for you in the test.