Where can I find online tests for medium/advanced english?

anyone?

What is a b1 certificate?

B1 (Threshold)

B1 is one of the CEFR levels described by the Council of Europe.

The ability to express oneself in a limited way in familiar situations and to deal in a general way with nonroutine information.
Examples:

Can ask to open an account at a bank, provided that the procedure is straightforward.
Can understand the main points of clear standard input on familiar matters regularly encountered in work, school, leisure, etc.
Can deal with most situations likely to arise while traveling in an area where the language is spoken.
Can produce simple connected text on topics that are familiar or of personal interest.
Can describe experiences and events, dreams, hopes and ambitions and briefly give reasons and explanations for opinions and plans.
B1 level exams

At this level you can do the PET and PTE General level 2 practice exams

You can also get an a B1 certificate if you do well enough in the PTE Academic, a multi-level exam, while B1 level candidates should get a >band score of 4-4.5 on the IELTS test.
B1 level practice

This web site contains practice tests at B1 level for reading, listening, grammar and vocabulary.

I would just google it for the rest of them, that is the first google search result.

well i was bored, so i used my google-fu skills.

http://www.examenglish.com/B1/index.php
http://www.examenglish.com/B2/index.php

thanks guys. Made one for B2 and those are the results Correct: 29
Incorrect: 5
Not Completed 1
TOTAL: 35