Brother, when the police instruct you, just blindly go. During my test, where there were only 2 ppl including me, the police shouted at the other guy because he was going at 50km/h. As u have learned in theory classes we are supposed to go at 50 or max 60. The police on that day wanted him to go at 80km/h. Of course he made some silly mistakes but the police was shouting at him all 5mins. For me, I knew he will shout, without waiting for his command I went the full 80km/h, I had manual car, and the ride was pretty jerky not at all smooth just like I practised during my training and apparently my car stalled in a T-junction. Well I guess due to my confidence I passed. Maybe when u were driving ur bodylanguage wouldn't have given him confidence to make you pass for the test.
Inshallah, may God bless you to get the license soon as well as a good job!