My attempted solution passes all tests except for the last one (Random models), where it either fails or passes validation depending on the validation logic of my EmailField. Unfortunately, the test doesn't give any details on where exactly it fails and I have no clue what I should change. What exactly are the validation requirements for EmailField? For example, do min_length and max_length apply to the entire email string or separately to each of address, subdomain, domain?

Edit: I found the bug in my solution and it had nothing to do with the EmailField but with validation of another field. Still, it's quite hard to debug the solution to this kata, because the user doesn't know what is tested for exaclty. Is that intended?