I don't know it will be THAT much of a big deal.
So long as one doesn't mind saying in the debrief "yep....that's what I look like after not flying for a few weeks, not practicing in the sim, and being thrown in for a check ride" and doesn't worry too much about the rough edges or being rusty for the first 20 minutes of the check.
It is silly to expect someone to be wholly proficient when off for a while and without practice--but safe and proficient are not the same thing. So long as you don't get wrapped up over something that is not your fault I think this won't matter much.
"Oh, you wanted me to be GOOD--I see....give me a couple minutes."