Susan and Mary Test (Johnny Test)

Susan and Mary Test (a.k.a. The Test Twins, The Test Sisters, The Test Girls) are the 13-14 year old eldest twin sisters of Johnny Test who are notorious in the series for making great scientific inventions to help Johnny with whatever problem he as and to keep him safe at the same time. They are also notorious for having a crush on their next-door neighbour Gil Nexdor.

Why They Rock

 * 1) As mentioned above, they are notorious for making interesting and creative scientific inventions they use to test them on Johnny, as well as creating ones that help Johnny solve problems he is facing and keep him safe.
 * 2) They both have a great twin-sister relationship with each other.
 * 3) They are excruciatingly highly intelligent and the smartest members of the Test family, mostly when it comes to science.
 * 4) They not only make inventions to help Johnny, but also to impress hunky boys like Gil Nexdor whom they have a crush on.
 * 5) They are also clever, as seen in numerous episodes, including one where they intend to teach Johnny and Dukey a lesson for messing with their experiments.

Why Susan Rocks
 * 1) She is the toughest of the two and is not afriaid to point out the wrongs in a constructive manner.
 * 2) Her voice sounds adorably cute.
 * 3) Her design is passable.
 * 4) She can be quite unintentionally sympathetic since she gets harrased by Bling-Bling Boy and easily annoyed by Johnny and Dukey.
 * 5) She can be reasonable and right at times.
 * 6) She is always aware of when Johnny is about to screw up with her and Mary's inventions.

Why Mary Rocks
 * 1) She appears to be more level-headed and empathetic than Susan.
 * 2) She aproaches and speaks to Johnny in a nicer way.
 * 3) Both of her voice actresses, despite not being good as each other, did a great performance for her.
 * 4) Speaking of her voice, it sounds so beautiful.
 * 5) She is shown to care about Johnny and is more compassionate to him more than anyone else (unless Susan makes an accurate point).
 * 6) She is also shown to help Johnny along with Susan when it comes to protecting him on his journeys.
 * 7) She is also shown to dislike Bling-Bling Boy (Eugene Hamilton) when he flirts with Susan.

Bad Qualities

 * 1) As the series went on, they became flanderized into becoming generic teens who flirted with boys they find hunky like Gil.
 * 2) Half of the time they get away with DNA experiments or other prohibited experiments. Especially making Dukey talk. This is mainly focused on experimenting with Johnny, altering his DNA as well. And they usually don't get caught, leading to them fitting in the mh:loathsomecharacters:Karma Houdini trope.
 * 3) They once turned themselves into babies just to spend time with Gil who was doing a babysitting service, which is pedophilia since nobody would want to date or fall in love with a baby.

 Susan's Bad Qualities 
 * 1) Even though Susan can be reasonably correct at times, she intends to get easily stern, rude, harsh, explosive, and mean. This is because she has a bit of a bigger temper compared to Mary, who is less harsher than her.
 * 2) In "Johnny's Amazing Cookie Company", she once snapped at a girl from a Girl Improvement Leauge and bashed at her, making the girl cry, much to Mary's disgust. Thankfully, she recieved full comeuppance in the part where the she and Mary made a fortune cookie that allowed Gil to kiss a girl holding a sign with his name on it, only for that same girl to come holding her Girl Improvement League sign (which ended up spelling "G.I.L." due to abreviating the League's name) and have Gil kiss her.
 * 3) She could be considered a mh:loathsomecharacters:Butt-Monkey since she gets harassed by Bling-Bling Boy, when her and Mary's inventions go wrong, getting easily bugged by Johnny, and also being a victim of her father's punishments along with the meatloaf gag.

Videos
https://www.youtube.com/watch?v=83Wh5FCQVfc https://www.youtube.com/watch?v=qffb9t7-g40

Trivia

 * 1) Although Mary isn't as tough and stern as Susan, she does have a mean side when she gets angry at Johnny for ruining her and Susan's experiments.
 * 2) Mary's voice actress, Britney Wilson, was only there for Season 1 and 5 while Ashleigh Ball voiced her for the second, third, fourth, and sixth season.
 * 3) The Test Twins are probably the reason why the show "Johnny Test" was accused of being a ripoff to Dexter's Laboratory because they are redheaded geniuses who have their own lab where they make lots of cool inventions while an annoying sibling comes and messes them up.

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