British astronaut Tim Peake is tested on his Russian skills
British astronaut Tim Peake has spent six years training for his mission to the International Space Station which blasts off on Tuesday 15 December.
He's said that the hardest bit was learning Russian - the language is needed to operate the Soyuz rocket and the Russian parts of the ISS.
We tested Tim's vocabulary and pronunciation with the help of two BBC Russian staff, Famil Ismailov and Anya Dorodeyko.
Video produced by Sara Barman.