diff --git a/perl/t/16_unpacker_for_larges.t b/perl/t/16_unpacker_for_larges.t
index 8d0b5d7..26894a2 100644
--- a/perl/t/16_unpacker_for_larges.t
+++ b/perl/t/16_unpacker_for_larges.t
@@ -2,7 +2,7 @@ use strict;
 use Test::More;
 use Data::MessagePack;
 
-foreach my $data("abc", [42]) {
+foreach my $data("abc", [ 'x' x 1024 ], [0xFFFF42]) {
     my $packed = Data::MessagePack->pack($data);
 
     my $unpacker = Data::MessagePack::Unpacker->new;