Johnny Test is a Canadian/American animated television series. It premiered on Kids' WB, on The WB Television Network, on September 17, 2005. The series currently airs in the United States on Cartoon Network, as of January 7, 2008, and in Canada on Teletoon, as of October 28, 2006. The show was produced by Cookie Jar Entertainment for its second and later seasons. The series is rated TV-Y7 for th...