Disclosure: this post was written with an AI assistant, working from the project's code and docs.

I run ultraielts , a free site where people preparing for IELTS take full mock tests in the computer-delivered format. The interface is in Turkish because that's who it's for. The tests are in English, as on the real exam.

The worst bug a practice test can have isn't a crash. It's a question with two defensible answers, or an answer key that's simply wrong. A student marks NOT GIVEN, the key says FALSE, and from then on they stop trusting every score the site gives them.…