This why I have to be self employed contractor, because I love a smoke, but lads who take coke pass drug test every time, If it's a '48 hour swob test', you can easily pass that, just stop smoking for a day or 2, have a shower before test, mouth wash etc, your 100% pass them, if it's a piss test you got no chance, you will need months off and need to do detox, If you can some how find out from someone who works there, I know you can't have that convo straight away with the lads at work, but 1 of them is bout to be on a level, the key is to find out the style of test, if it's a 48 hour one or a piss test.