Oh I see..they don't make it easier.. So you booked for the A1 Life Skills. Bear in mind that your wife would need to retake the English test when she applies for ILR because she needs to have B1 for that.
I would advise that if the wives/fiancees/partners of the members here are good and confident enough in conversing in English to take the B1 so they won't have to retake in the future. UKVI will accept expired IELTS test results as long as it's equivalent to B1 and above.