As far as I know the bus goes through Kosovo and apparently Kosovo is the only country that doesn't require visa from anyone, so you should be fine.
Location: Places >> Europe >> Macedonia (FY)
Trip from Skopje to Podgorica
We are taking a bus from Skopje to Podgorica and are wondering if it goes through Serbia or not.
We are brazilians and would need visa for Serbia, but we don't need visa for Albania.
Thank you very much!
Pedro & Luisa.