--- /dev/null
+#!/usr/bin/env perl
+
+use strict;
+use warnings;
+use Test::More;
+use utf8;
+
+# setup library path
+use FindBin qw($Bin);
+use lib "$Bin/lib";
+
+use Catalyst::Test 'TestAppWithoutUnicode';
+use Encode;
+use HTTP::Request::Common;
+use URI::Escape qw/uri_escape_utf8/;
+use HTTP::Status 'is_server_error';
+
+my $encode_str = "\x{e3}\x{81}\x{82}"; # e38182 is japanese 'あ'
+my $decode_str = Encode::decode('utf-8' => $encode_str);
+my $escape_str = uri_escape_utf8($decode_str);
+
+check_parameter(GET "/?myparam=$escape_str");
+
+sub check_parameter {
+ my ( undef, $c ) = ctx_request(shift);
+ is $c->res->output => $encode_str;
+
+ my $myparam = $c->req->param('myparam');
+ ok !utf8::is_utf8($myparam);
+ is $myparam => $encode_str;
+
+ is scalar(@TestLogger::ELOGS), 2
+ or diag Dumper(\@TestLogger::ELOGS);
+ like $TestLogger::ELOGS[0], qr/method \"decode\"/;
+}
+
+done_testing;