ext/PerlIO/t/encoding.t See if PerlIO encoding conversion works
ext/PerlIO/t/fail.t See if bad layers fail
ext/PerlIO/t/fallback.t See if PerlIO fallbacks work
+ext/PerlIO/t/ioleaks.t See if PerlIO layers are leaking
ext/PerlIO/t/open.t See if PerlIO certain special opens work
ext/PerlIO/t/PerlIO.t See if PerlIO works
ext/PerlIO/t/scalar.t See if PerlIO::scalar works