--- /dev/null
+#!/usr/bin/perl -w
+
+BEGIN {
+ if( $ENV{PERL_CORE} ) {
+ chdir 't';
+ @INC = '../lib';
+ }
+}
+
+use strict;
+use warnings;
+
+use Test::More skip_all => 'Not yet implemented';
+
+my $have_perlio;
+BEGIN {
+ # All together so Test::More sees the open discipline
+ $have_perlio = eval q[
+ use PerlIO;
+ use open ':std', ':locale';
+ use Test::More;
+ 1;
+ ];
+}
+
+use Test::More;
+
+if( !$have_perlio ) {
+ plan skip_all => "Don't have PerlIO";
+}
+else {
+ plan tests => 5;
+}
+
+SKIP: {
+ skip( "Need PerlIO for this feature", 3 )
+ unless $have_perlio;
+
+ my %handles = (
+ output => \*STDOUT,
+ failure_output => \*STDERR,
+ todo_output => \*STDOUT
+ );
+
+ for my $method (keys %handles) {
+ my $src = $handles{$method};
+
+ my $dest = Test::More->builder->$method;
+
+ is_deeply { map { $_ => 1 } PerlIO::get_layers($dest) },
+ { map { $_ => 1 } PerlIO::get_layers($src) },
+ "layers copied to $method";
+ }
+}
+
+SKIP: {
+ skip( "Can't test in general because their locale is unknown", 2 )
+ unless $ENV{AUTHOR_TESTING};
+
+ my $uni = "\x{11e}";
+
+ my @warnings;
+ local $SIG{__WARN__} = sub {
+ push @warnings, @_;
+ };
+
+ is( $uni, $uni, "Testing $uni" );
+ is_deeply( \@warnings, [] );
+}