Michael Albinus <michael.albinus@gmx.de> writes:

Hi Tino,

> I'm very sorry, but this is a special case. Usually, we appreciate much
> to run the tests with "emacs -Q". However, it happens often that I have
> to debug Tramp problems which are related to cached properties, or
> passwords. That's why Tramp neither loads cached properties, nor uses
> auth-sources when Emacs is called with "-Q".

FTR, I have documented this in the Tramp manual. See appended patch,
pushed to the emacs-27 branch.

Best regards, Michael.