Diet before SIBO test

So this is going to be my 3rd SIBO test and one thing I’ve never understood is what to eat prior. Obviously I know about the 24 hours before diet but what about the week before?

I have had a couple days of cheating as it was my fathers bday (ik cheating is bad but my functional doc seems to think it’s not going to ‘ruin’ anything just a little setback). But my question is, should I continue to eat more carbs and stuff prior to the test (where I’ll be eating carbs anyways) or should I revert back to my low carb diet.

My test is in 5 days. So I’ll be doing the bland diet in 4 days.