Why is CI not running dmd's unittests?

[wolframw via Digitalmars-d]

Hi,

I ran the dmd unittests on my Windows machine today and one of 
the tests in filename.d asserted. The cause for this has already 
been noticed a few days ago by someone else [1] but not by CI.

Is it well-known that the dmd unittests (at least for the Windows 
build) are not automatically run? If so, what is the reasoning 
behind it?


[1] 
https://github.com/dlang/dmd/commit/7baa0e82802839940fb0620bad02e97f741d2c27#r30571264