Fallout 76 test cell content

General information
Fallout 76 features more test cells than any other game. However, they are largely inaccessible because of the online nature of the game. As such, there is very little known about most test cells aside from some datamined changes to them. Account suspensions have been issued for finding ways into test cells and acquiring cheats or other items meant to be innaccessible in-game.

In addition to test cells, several test worlds exist in the files, recorded with the WRLD tag. The Appalachia worldspace is the only WRLD that is not meant for testing purposes. Diamond City and Goodneighbor also exist as legacy content.

This page lists the cell or world's editor ID first, followed by its display name in parantheses. Many cells or worlds have names that link them to a certain developer. Known developers are recorded on the page as references.

Behind the scenes
The display name for TestZach, "Snape Kills Dumbledore," is a reference to Harry Potter and the Half-Blood Prince. This crucial event in the plot was widely spoiled before the book's release, turning the phrase into a meme relating to spoilers as a whole.