High Quality Content by WIKIPEDIA articles! Johnny Test is an American/Canadian animated television series. It premiered on Kids` WB, on The WB Television Network, on September 17, 2005. Five months later, it was introduced to Cartoon Network UK on January 12, 2006, first, as a sneak preview on Jungle Saturdays Block, and then on June 5, 2006, added to its daily lineup. Despite the merger of the UPN and that programming block`s parent channel into The CW Television Network, the show still continued to air on Kids` WB, on The CW, with its second and third seasons, through October 28, 2006 to until March 1, 2008. 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. International airings include Teletoon in Canada, Nick Germany, Disney Channel Spain and on Cartoon Network in Latin America, Hungary, Poland, Romania, Denmark, Ireland and Sweden. The show was produced by Warner Bros. Animation for the first season and later seasons by Cookie Jar Entertainment. The series is rated TV-Y7 for the first four seasons, and TV-Y7-FV for the fifth.