After decades of paper and proctor, and years of searching and programming, CELT is online. The tests are all individualized so that you don’t have to take all at once, but you only get one try at each test. Being that you only pay for tests you pass, why not give that one you’re not sure about, an honest try. if you don’t pass, you didn’t waste any money. Tests are timed and graded via computers, but don’t worry, if you know a subject well you will have plenty of time.