xt/author/pod-coverage.t
xt/author/code-coverage.t
xt/author/perl-critic.t
xt/stress/one-minute-test-run-under-memory-pressure.t
xt/stress/one-hour-thread-safety-test.t
xt/stress/twenty-four-hour-memory-leak-test.t
xt/doco/test-user-doco-1.t
xt/rtbug/rt123.t
xt/rtbug/rt456.t
# ...

##</code><code>##

xt/author  - run when the tests are being run in an author's working copy
xt/smoke   - run when the dist is being smoked (AUTOMATED_TESTING=1)
xt/release - run during "make disttest"