Comedians Michael Che and Colin Jost are great at telling jokes, but the Saturday Night Live stars suck at lying. At least when they're strapped to a lie-detector test, that is. The 'Weekend Update' hosts recently sat down for a voluntary polygraph for Vanity Fair, which had Che and Jost trade embarrassing questions while a stern technician commented on the results.

So what did we learn based on the results? Michael Che secretly watches 'Keeping Up with the Kardashians' and is VERY defensive about it. Meanwhile, Jost admitted that he does "something illegal" backstage at SNL at least 2-3 times per year (but he didn't specify what that was). And both dished on their opinions of each other and members of the SNL cast.

Check out the tense confessional in the clip above.