It will be a simple urine test, may or may not be observed, I doubt it.
If you're a regular smoker it maybe hard to get clean by then.
Eat a high fiber diet with metamucil, exercise as much as you can.
3 days before UA switch to red meat high fat diet and stop exercising.
Follow the dillution sticky the morning of the test.
I would pickup some synthetic urine if you can and use that at the UA if its not observed.