Remain calm , Do not panic ,Be relaxed.
Mainly follow all the orders of the officer .It is a test , of course the officer will test you in all respect. Just follow the 12 steps

1)Put seat belts.
2)Adjust seat.
3)Adjust side & rear mirror.
4)Chnging lanes use correct indicator.
5)Use the mirror while changing lanes properly;move your head towards the mirror as you change the lane as the officer checks it.
6)Remain straight in motion at the lane.
7)Follow the signs of the road properly.
8)Follow the corrrect speed limit;if officer says to increase a little speed obey him and improvise accordingly.
9)Keep safe distance from the front vehicle.
10)When changing lanes slightly turn for checking the blindspot
11)Do not horn during test anywhere;Unless the officer tells you to.
12)When stoping put correct indicator(emergency one) put gear into parking gear and then appy parking brake & smoothly exit the vehicle.

These things may seem small , but this is what made me pass and what counts for your test. All the best .