First, I had an online math test. It is 30 questions for 20 minutes, for right answer you get 1 point and -1 point – for wrong answer. I strongly recommend not to do the whole test, skip questions and get about 15-20 answers, in which you are quite sure. This test is not similar to any tests, but it looks rather like GMAT, then SHL.
Then I had the 1st round of interviews: fit interview and case interview. Interviewers were extremely friendly they helped a lot during case interview, basically, they we looking at my ability to reason and to explain my ideas. I also recommend having a good look at case, for me it seemed to be not as complicated as it proved to be.