Johnny Test is an animated television series created by Scott Fellows, originally produced in the United States by Warner Bros.

[4] The series revolves around the adventures of the titular 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, who are scientists and best friends with each other, and a talking dog named Dukey.

Johnny is often used as a test subject for his genius twin sisters' inventions and experiments, ranging from gadgets to superpowers.

[6] 11-year-old Johnny is part of the Test family, consisting of his 13-year-old genius twin sisters, Susan and Mary, and his over-the-top parents.

Susan and Mary frequently use Johnny as a guinea pig for their various experiments and inventions in their laboratory filled with highly advanced technology built over the Tests' household attic.

Most of them involve trying to impress their pretty boy-next-door neighbor, Gil, for whom both harbor a deep love and obsession, although their attempts to come up with some way to attract his attention usually fail.

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.

He is also stubborn, and like many kids, he doesn't like school; if anything, he will often go to great lengths to avoid any work, often using his sisters' inventions to do so, resulting in himself and others in trouble.

Meanwhile, the General from the army base Area 51.1 and Mr. Black and Mr. White, two federal agents from the Super Secret Government Agency (SSGA), are shown to be close friends with the kids and often get them out of trouble or recruit them for an assignment, help them, distract, or annoy the Tests on various occasions.

On February 16, 2005, Kids' WB's unveiling of its new fall schedule for the 2005–2006 television season was announced by The WB Television Network, featuring its returning series Yu-Gi-Oh!, Pokémon, The Batman, and Xiaolin Showdown, alongside four new series: Loonatics Unleashed, Coconut Fred's Fruit Salad Island, Transformers: Cybertron, and Johnny Test.

The show premiered on September 17, 2005, on Kids' WB's Saturday morning lineup of its weekly fall schedule, alongside Loonatics Unleashed and Coconut Fred's Fruit Salad Island.

Many of the original crew of the series' first production season consisted of alumni of well-known animation studios such as Cartoon Network Studios and Nickelodeon Animation Studio, as well as artists from the comic book industry, including Chris Savino, Marc Perry (character designer for Cow and Chicken, Poochini, and The Grim Adventures of Billy & Mandy), Paul Stec, Matt Danner, Joe Horne, Mike Kazaleh, Brian Larsen, Jun Falkenstein, Scott Shaw!, Nora Johnson, Milton Knight, Ray Leong,[12] Chris Battle, Casey Mitchum,[13] Pat Ventura, John Derevlany, J.C. Cheng, Aliki Theofilopoulos, George Cox III, Frederick J. Gardner III, Allan Penny, Justin Schultz, Christopher D. Lozinski, Dane Taylor, and Rita Cooper.

Fellows himself would leave after season 3 in order to create Big Time Rush for Nickelodeon, though he would still retain his creator and executive producer credits.

Starting with the fifth season, Trevor Devall would become the new voice of Dukey, due to Louis Chirillo leaving the series.

On January 7, 2008, the show debuted on Cartoon Network, which aired the remainder of the series, and ended on December 25 (Christmas Day) 2014.

On January 4, 2011, it was announced that Mill Creek Entertainment had acquired the rights to the series, under license from DHX Media.

Joly Herman of Common Sense Media had written and posted a review of Johnny Test on Go.com, at the time of the show's original debut on Kids' WB.

In the review, Herman indicated that the series "is an age-appropriate choice for kids" and was "surprisingly inventive and not as violent as other cartoons in this genre", adding, "The only thing worth mentioning: All the experiments Johnny undergoes are unattended by adults, which allows all types of zany plots to unfold."

[49] Cookie Jar had partnered with restaurant chain CKE Restaurants to offer a promotional Johnny Test toy campaign at its Carl's Jr. and Hardee's restaurants in the U.S. and Mexico, one of the four custom-designed premiums with the purchase of their Cool Kids Combo meals; The campaign ran from June 28, 2010, through until August 24, 2010, with Carl's Jr. also having subsequently presented a Johnny Test soccer-themed promotion in Mexico, which lasted June 7 – July 25, 2010, to coincide with the country's World Cup activities.

[50][51] Philippines-based fried chicken chain Jollibee advertised a similar toy campaign in their Kids' Meals as well, in the form of their Amazing Adventure Chasers mini-toyline.

[53] On January 21, 2010, another partnership had emerged between Cookie Jar Entertainment and the mobile application developer Jirbo that resulted in two Johnny Test video games produced by the developer and made available exclusively for download from iTunes, for free and for the iPhone, iPod Touch and iPad.

[54][55] Viper Comics announced in April 2011 that they would be publishing a Johnny Test graphic novel along with another Cookie Jar Group property, Inspector Gadget.