-ext/IO/lib/IO/t/IO.t See if IO works
-ext/IO/lib/IO/t/io_const.t See if constants from IO work
-ext/IO/lib/IO/t/io_dir.t See if directory-related methods from IO work
-ext/IO/lib/IO/t/io_dup.t See if dup()-related methods from IO work
-ext/IO/lib/IO/t/io_linenum.t See if I/O line numbers are tracked correctly
-ext/IO/lib/IO/t/io_multihomed.t See if INET sockets work with multi-homed hosts
-ext/IO/lib/IO/t/io_pipe.t See if pipe()-related methods from IO work
-ext/IO/lib/IO/t/io_poll.t See if poll()-related methods from IO work
-ext/IO/lib/IO/t/io_sel.t See if select()-related methods from IO work
-ext/IO/lib/IO/t/io_sock.t See if INET socket-related methods from IO work
-ext/IO/lib/IO/t/io_taint.t See if the untaint method from IO works
-ext/IO/lib/IO/t/io_tell.t See if seek()/tell()-related methods from IO work
-ext/IO/lib/IO/t/io_udp.t See if UDP socket-related methods from IO work
-ext/IO/lib/IO/t/io_unix.t See if UNIX socket-related methods from IO work
-ext/IO/lib/IO/t/io_utf8.t See if perlio opens work
-ext/IO/lib/IO/t/io_xs.t See if XSUB methods from IO work