The Boring Tester is a large machine that has picture of the main characters on it. It has hands and two eyes And a mouth. In between the eyes is an arrow that randomly points at the characters, though it's unknown what this means. It also has what appears to be a graph right underneath its mouth, and a lever on its side.
- Boring Tester debuted in a teaser video during the production of Don't Hug Me I'm Scared 5, but it's not present in that episode.
- It has been stated in an interview that the boring tester was to appear in a flashback scene in DHMIS 5, but the scene was cut.
- It is possible that it was foreshadowing the death of the Duck Guy since when the video ends the arrow stops in between Duck Guy and Yellow Guy.
- It looks similar to the strange dream machine that Roy controls seen in the 6th episode. It is possible that it is an upgraded version of the Boring Tester.