The TCF? There are two parts. One is mandatory and concerns oral comprehension, mastery of language structure and written comprehension. That takes an hour and a half.
Then there are two optional parts concerning oral and written expression. That lasts another two hours, I believe.
It's quite long, but the test is really rigorous. It's kept secret; we can't see it before we get it. We open the envelope and we discover it.
We've been very satisfied because we think the questions are quite consistent with the grammar we teach, but we've also been very impressed by the rigour of the test. It's not easy. The last questions are really complicated.