Covenant

Covenant is a location and possible settlement in the Commonwealth in Fallout 4.

Layout
Covenant is a small settlement of only a few people. There is a large wall surrounding the whole settlement with multiple machine gun turrets on small wooden platforms. Inside the wall are four houses and a small garden. The houses look incredibly intact, as if they had not been touched by the great war at all. The Sole Survivor comments on this by saying that all the buildings look almost pre-war. There is a workbench near the garden in a shack.

Appearances
Covenant only appears in Fallout 4.

Behind the scenes
The SAFE Test, the test to get into Covenant, is actually the G.O.A.T. test from Fallout 3 having all the questions except the last question, but a few have been modified.

This is also a pretty blatant reference to the Voight-Kampff test from Blade Runner/Do Androids Dream of Electric Sheep.

Settlement
It is possible to settle the Covenant if you complete the Human Error mission and side against the Covenant. Returning after completion will initiate a battle with the residents and settlers in which you can use the workshop once you emerge victorious. To emerge victorious you must destroy all the machine gun turrets and kill everyone except the cat.

In some cases, it has been reported that if you can avoid alerting the turrets and Deezer, you don't have to destroy them. Somehow get the townsfolk to chase after you outside their walls, and you can leave the turrets up, let the lemonade vendor serve on, and still access the workshop. You can't dismantle the turrets, and they don't count towards the defense score, but they ought to attack hostiles. (Need confirmation) You could also, at this point, just destroy them for a tiny bit of 5.56 ammo. Deezer cannot be moved to another settlement, and if killed, only drops flamer ammo.