Remember that although this document looks pretty scary, the examiner does have some discretion and if conditions are poor, may not apply the tolerances rigidly.
My impression, on all skill tests I have done (PPL, CPL, IR), is that the examiner is on your side. You will be dealt with fairly and the atmosphere of the flight will be cordial. The examiner won't put extra pressure on you. You will have quite enough on your mind as it is!
Good luck
