If you take the test and end up getting a low score, you may take it again. There is no limit to how many times someone can take the TSI test. However, it is recommended that you take some time to study instead of immediately scheduling another testing appointment. Getting a low score on the TSI exam does not disqualify you from attending the college you want to go to, but the higher the grade you get, the lower your chances of having to take prerequisite courses.