How do I get the self tests to run only the tests that use a particular set of test source files?

[Richard Sharpe]

Hi folks,

So, if I am modifying selftests or writing new self tests, how can I say:

Self-tests, just run those tests, and only those tests that use the
file(s) I have just added or modified?

-- 
Regards,
Richard Sharpe
(何以解憂？唯有杜康。--曹操)