Add properties to each test. List of tests

[pprettysimpple]

Is there a way to add custom property (for example LABELS or WORKING_DIRECTORY) to each of the tests, added by pytest_discover_tests?
Looks like my tests want to be launched in the specific directory + I want to separate long-running python from gtests of my project with a labels. The ability to hack-into and get the list of all tests might be really helpful, until every feature is supported natively with this function.
Thanks!