If you use Module::Build to generate the Makefile.PL, this section from the documentation is relevant for you:
If the "recursive_test_files" property is true, then the "t/" directory will be scanned recursively for "*.t" files.

If not, what build system do you use?

Update: ExtUtils::MakeMaker has this in the documentation:

Additional lowercase attributes
...
test
           {TESTS => 't/*.t'}

[download]

I guess this is the place where you start to experiment, perhaps 't/*.t t/*/*.t' does what you want.

In reply to Re: Test::Simple tests in multiple folders? by moritz
in thread Test::Simple tests in multiple folders? by jdrago_999

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