Johnny Test: The Lost Web Series is the online revival of Johnny Test. It was first announced on March 15, 2019 when the official Johnny Test YouTube channel revealed that new animated shorts of the series would be coming soon with no official release date.
On May 1, 2020, over a year after the announcement, a countdown began on the Johnny Test YouTube channel which led to the premiere of the first short of the revival, "League of Johnnys", on May 2, 2020.
The first episode, "League of Johnnys", was removed from YouTube on May 5, 2020 for unknown reasons and was lost until being reuploaded.
Update: The episode luckily got backed up on Vimeo and Google Drive