When does Johnny Test return?

Johnny Test is an animated television series created by Scott Fellows. It premiered on Kids' WB on September 17, 2005, which continued to air the series through its second and third seasons. The series aired on Cartoon Network on January 7, 2008, and ended its run on December 25, 2014. In Canada, the show premiered on Teletoon on September 3, 2006. A revival series has been picked up by Netflix for two seasons and a 66-minute interactive special.
Eleven-year-old Johnny is a mischievous and unpredictable boy who causes many problems. His best friend is his anthropomorphic talking pet dog, Dukey, who Susan and Mary gave human-level intelligence and the ability to speak in an experiment.