Ignored silent flag in a test run

Question

I'm currently trying to use the PlUnit test suit and encounter a problem to turn off the output of my predicates during the test.

The documentation says that I should be fine with something along the lines of set_test_options([silent(true)])., however that doesn't seem to have any effect on my test runs.

I tried to put those options into my load_test_files/1 call as well, but it didn't change anything.

If anyone can provide help about this library that'll be gratefully read, as I seem to misunderstand the documentation and am getting nowhere when trying to see what fails here.