The Testing Standard (official name: [Testing Standard], sometimes known as the testing server) is a testing place for new elements on Elemental Battlegrounds. It was created during the development of Elemental Battlegrounds, and has been the official testing place for new elements since the beginning.
On 2017 and 2018 the Testing Standard was open for the public to test the new element that was coming out, however after the "Tester" rank was released on Gamer Robot, only players with that rank had access to the Testing Standard, along with developers and owners of the game. The last time the Testing Standard was open to the public was on midnight of December 31, 2018, on which it was open for 1 hour for people to test the Angel element.
Unlike the official Elemental Battlegrounds, the only accessible map here is the Standard Map, therefore its name "Testing Standard".
There is a single gamepass on the game which is a test pass and it's called "scary dragon" and it costs the maximum amount of Robux (999,999,999), and it's unknown if this gamepass does something or what it does if it does something. There are also two badges named "questionmark" and "question mark 2" which are impossible to be achieved.
It is weird how despite the map being the Standard map, the single poster is an image of a baseplate.