Don't worry about passing, your instructor won't put you up for it if they think you're not ready !
I'm a member of the growing Partial Pass Club, I just couldn't get steep turns right on the 150 and demonstrated spiral dive recovery during my flight test when I should have been doing steep turns .......
The examiner was very nice about it, I was just going over to Alderney for the summer, borrowed the club plane there and an instuctor for a week where we did steep turns until they were automatic, then the examiner came out the following week when I passed. On the day of the test, over water (Casquets Lighthouse ) it was very hazy in a English Channel sort of way, there was no horizon so I did my repeat steep turns on instruments !
Good Luck !,
LF