The series revolves around the adventures of the title character, Johnny Test, an 11-year-old suburban boy who lives with his parents, his "super-genius" 13-year-old twin sisters, Susan and Mary, both of whom are scientists and best friends with each other, and a talking dog named Dukey.read more
The series revolves around the adventures of the title character, Johnny Test, an 11-year-old suburban boy who lives with his parents, his "super-genius" 13-year-old twin sisters, Susan and Mary, both of whom are scientists and best friends with each other, and a talking dog named Dukey.