Piltdown Man - that's a guaranteed way of failing your test.
You are the Pilot in Command and are responsible for ensuring your passenger is strapped in and the door is shut!
Failure to do so shows a clear misunderstanding of the whole concept of being a Professional pilot bearing in mind it is simulating the single pilot operation in such an aircraft.
With regards to brakes - I don't see why the examiner would check them - you are legally allowed to operate it as pilot in command and act as so during the test - they are there as supernumerary - so it's pretty common for them to not check their brakes.