t/README Instructions for regression tests
t/re/charset.t See if regex modifiers like /d, /u work properly
t/re/fold_grind.t See if case folding works properly
+t/re/no_utf8_pm.t Verify utf8.pm doesn't get loaded unless required
t/re/overload.t Test against string corruption in pattern matches on overloaded objects
t/re/pat_advanced.t See if advanced esoteric patterns work
t/re/pat_advanced_thr.t See if advanced esoteric patterns work in another thread