They removed it and if memory saves right it's because it was easy to cheat during the test, kind of making it pointless.
However, it's "seemingly" easier to become a tutor now as the Required Qualifications are the same as in the past minus the tutor test part.
( Sourced from https://www.tibia.com/support/?subtopic=tutorguide#tutorcareer )
2.1 Required Qualifications
In order to be a tutor in Tibia, you must be an experienced player. The following requirements must be met:
- You must have played the game for at least three months. Also, there must be at least one character of level 20 or higher on your account.
- In case you have one or more entries in your rule violation record, your conduct level must be green.
- Your account must be registered.
- You must have received 40 "Thank you!'s" in the last 90 days.