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Susan and Mary Test (also known as The Test Twins) – Johnny’s genius twin sisters and daughters of Hugh and Lila, who frequently use him as a lab rat for various inventions, most of which to impress their neighbor, Gil.Click to see full answer. In this manner, what grade is Johnny Test in?11 years old usually = 5th or 6th grade.Furthermore, who is Johnny Test girlfriend? Sissy Blakely. Elisabeth “Sissy” Blakley is Johnny’s on/off romantic antagonist. Sissy is a 12 year-old girl who’s a rival of Johnny who’s younger than her, and she is much smarter than him. Simply so, how old are the test sisters? 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.What breed is Dukey from Johnny Test?Later, Susan and Mary gave him super intelligence as they hated his behavior as a normal dog. In the same episode, his breed was revealed to be “Westminster Farting Mutt”.
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