I've never done it, but its the walk and trot right? They aren't going to ask you to do anything nasty, it will be purely to make sure your horse has a good grounding of basic schooling - nothing to catch you or your horse out - honest!!!
My sister did this for her first dressage test. It is not a hard test and it is only walk and trot. As 'hellspells' says there is nothing to catch you or your horse out!