t/op/subst_wamp.t See if substitution works with $& present
t/op/sub.t See if subroutines work
t/op/switch.t See if switches (given/when) work
+t/op/symbolcache.t See if undef/delete works on stashes with functions
t/op/sysio.t See if sysread and syswrite work
t/op/taint.t See if tainting works
t/op/threads_create.pl Ancillary file for t/op/threads.t