Mystery with phpunit

Hi everyone, I'm currently following the Create forum with TDD series, and everything was working fine, I reached the end of lesson 17 and suddenly, when I run phpunit, I only get a bunch of errors, TokenMismatchException... So, it's kind of mystery cause I left when everything was green, and when I came back, It's all red... I pulled Jeffrey's code on github, and it produces the same results when it should be green.. Anyone knows what happened ? Also, this thing work as intended in browser... Thank you in advance.