Well conducting a CPL test is about safety and being within the limits set out. Closing the door and ensuring belts are fastened is a dilema of safety, but considering that it is a COMMERCIAL pilots license, do you think when were all sitting on our boeings or airbus aircrafts that were going to go out and check each passenger and door before we go flying?, well if we did we would probably be about 2 hours late for departure. Though we do get a call from the cabin, advising "captain, cabin is secure", same thing goes while doing a flight test, ok ask the examiner if he is secure and door is closed, but also "LOOK" use your eyes, thats what there for, if he's sat tight and door looks closed, just expect a call from them, but make sure that it is closed and locked, afterall you are PIC.
Hope this helps
