You could just use synthetic urine for the drug test thats what some do
If you don`t want to risk it buy synthetic marijuana I smoked a fair share of that stuff too. It doesn`t exactly feel like mj but there are new blends out with different cannabinoids in everyday.
You could also buy a natural product called Kratom off the net. Kratom is a tree and is legal in most countries. You can make tea with the stuff for a real chilled afternoon, it is not an opiate (e.g doesn`t show up on a drug test) or addictive. Its habit forming but the tea tastes pretty bad so its not easy or convenient if you get me
I tried it once 2 months ago but there are people who have it few times a week
It has a very nice high too, leaves you all warm and euphoric
Its more expensive than cannabis though but the high is lovely
Or just don`t smoke. I just got a bag yesterday, didn`t smoke for 3 weeks before this bag
That enough options for you?