What is 'automatic test of tribler anonymous downloading and seeding'?

what is ‘automatic test of tribler anonymous downloading and seeding’?

Its not in the FAQs.

It’s an automatic download we used to test the experimental tunnel community. It contains garbage and it disables itself after finishing successfully or after some time (I don’t remember how long) That experiment ended so it should not be triggered anymore on a recent Tribler version.

I’m using 6.4.3 and its loading that on startup. Then a popup alerts me that the download is already in the list. How to disable it?

You can create a file named anon_test.txt in your .Tribler directory while Tribler is not running, or just just upgrade to to the latest pre-release and report any issue if you find one (this new release doesn’t have this experiment enabled on it anymore).