Does take some time though, the tests themselves barely take any time so this is all "boilerplate". Not so great, means the tests probably won't be running for every commit on the server, unlike Godot.
Still nice though, can definitely run multiple times a day.
Still having issues when building for multiple platforms.
Apparently Unity needs to switch stuff between platforms and I still haven't found a way to let the CI do that automatically. It just throws an error when trying to build for say Windows and WebGL.