Seasons & episodes
S4 · E25iJohnny 2010-02-25 · 11 min
The twins upgrade Johnny's new cell phone. Later the phone becomes too intelligent and begins hacking government space missiles.
S4 · E26Johnny vs. The Mummy 2010-02-25 · 11 min
Johnny goes on a trip to the museum and brings the things to life, including a mummy.
S4 · E27Johnny Grow Your Own Monster 2010-05-10 · 11 min
Johnny's mail order foam monster becomes a real monster once the twins swap the water with their bottle of "side effects".
S4 · E28Who's Johnny 2010-05-17 · 11 min
When Sissy considers Johnny too gross to help her in a science project, he begs Susan and Mary to change his personality.
S4 · E29Princess Johnny 2010-05-24 · 11 min
Johnny poses as a princess in order to prevent a war. Meanwhile, Susan and Mary decide that they would like to act like normal girls.
S4 · E3099 Deeds of Johnny Test 2010-07-05 · 11 min
After getting his 99th detention, Johnny learns he must perform 99 good deeds or he will be sent to military school.
S4 · E31Johnny's Amazing Race 2010-07-12 · 11 min
Johnny and Dukey challenge his sisters, their friends, and their enemies to a survival challenge in which the winning team gets hundreds of dollars in gift certificates.
S4 · E32Johnny Test in 3D 2010-07-19 · 11 min
While the tests go on vacation, Johnny and Dukey try to get back into their hotel room and avoid the hotel manager that doesn't allow pets.
S4 · E33Guess Who's Coming to Johnny's for Dinner 2010-07-26 · 11 min
Mr. Black moves in with the Tests after he embarrasses Mr. White at the dance contest auditions.
S4 · E34Johnny's New BFF 2010-08-02 · 11 min
Johnny's parents keep setting Johnny up with new friends. When those don't work out, Johnny reveals Dukey's intelligence. Later, Dukey spends more time helping Johnny's parents instead of playing with Johnny.
S4 · E35Johnny vs. Bling Bling IV 2010-08-09 · 11 min
Johnny once again has to protect Susan from Bling Bling Boy who is determined to have her as his valentine.
S4 · E36Johnny's Big Sister Smackdown 2010-08-16 · 11 min
Susan and Mary both want Gil to go on a date with them, so they put up a wrestling match using rough guts (Susan uses Johnny's while Mary uses a lion's), but it leads to destructive results.
S4 · E37Sunshine Malibu Johnny 2010-08-23 · 11 min
Johnny goes to the beach to surf, but there are no waves, so Susan and Mary build a wave making machine and special surfboard for him.
S4 · E38Johnnyicle 2010-08-30 · 11 min
Johnny and Dukey try to help Brain Freezer get a girlfriend.
S4 · E39King Johnny 2010-09-06 · 11 min
Johnny becomes obsessed with domination after Susan and Mary bring his chess pieces to life.
S4 · E40Johnny Re-Animated 2010-09-13 · 11 min
Johnny uses one of his sisters' inventions to bring two cartoon characters to the real world in order to scare Sissy out of the house, but the characters mistake Porkbelly for a zombie world and try to destroy it.
S4 · E41Johnny Cakes 2010-09-20 · 11 min
It's Lila's birthday and the family spends the morning to make her birthday a success. Johnny struggles to make her breakfast, Hugh tries to figure out a good but inexpensive gift for her, and the twins keep trap Lila in her bedroom until Hugh and Johnny are ready.
S4 · E42Johnny Tube 2010-09-27 · 11 min
Johnny wants to become a internet sensation.
S4 · E43Sleepover at Johnny's 2010-10-04 · 11 min
Johnny is dragged into Susan and Mary's plan to get Gil to be in a sleep-over, but Bling-Bling Boy and Dark Vegan's daughter Jillian become involved as well, with the usual chaos ensuing.
S4 · E44Johnny's Got a Wart! 2010-10-11 · 11 min
Johnny gets a wart, and when his sisters try to get rid of it, it gives the wart intelligence and seems to make Johnny's life better, but he tries to take over his body as he gets more powerful.
S4 · E45Johnny's Royal Flush 2010-10-18 · 11 min
When Susan and Mary turns Johnny into a fish as part of one of their experiments, Hugh flushes him down the toilet by mistake where he ends up in the sewer, and he has to swim for his life when he runs into an alligator.
S4 · E46Johnny Test's Day Off 2010-10-25 · 11 min
Johnny ditches school with a relentless truant officer in hot pursuit.
S4 · E47Johnny & Dark Vegan's Battle Brawl Mania 2010-11-01 · 11 min
Dark Vegan once again tries to destroy Johnny, who is trying to cheer up lonely Repto-Slicer.
S4 · E48A Scholarship for Johnny 2010-11-08 · 11 min
Hugh wants to train Johnny to be good at sports so that he could get a sports scholarship to college.