It seems as though Kolya is able to get a degree of special treatment from his captors thanks to how charming he is, as he's allowed to stay and watch Lev and Vika perform the test. His charm likely saves Lev in this instance, and Vika's decision to not even try to read likely saves her from being outed as female. We again see that Markov's betrayer is still being ostracized from the group.