t/lib/feature/err Tests for enabling/disabling err feature
t/lib/feature/nonesuch Tests for enabling/disabling nonexistent feature
t/lib/feature/say Tests for enabling/disabling say feature
-t/lib/feature/smartmatch Tests for enabling/disabling smartmatch feature
t/lib/feature/switch Tests for enabling/disabling switch feature
t/lib/Filter/Simple/ExportTest.pm Helper file for Filter::Simple tests
t/lib/Filter/Simple/FilterOnlyTest.pm Helper file for Filter::Simple tests
t/op/regexp_qr_embed.t See if regular expressions work with embedded qr//
t/op/regexp_qr.t See if regular expressions work as qr//
t/op/regexp.t See if regular expressions work
+t/op/regexp_kmod.t See if regexp /k modifier works as expected
t/op/regexp_trielist.t See if regular expressions work with trie optimisation
t/op/regmesg.t See if one can get regular expression errors
t/op/repeat.t See if x operator works