diff -bu Sereal-3.014-VgjKE7/t/300_overload.t~ Sereal-3.014-VgjKE7/t/300_overload.t
--- Sereal-3.014-VgjKE7/t/300_overload.t~	2014-12-24 15:20:02.000000000 +0100
+++ Sereal-3.014-VgjKE7/t/300_overload.t	2016-06-14 15:51:39.000000000 +0200
@@ -33,14 +33,14 @@
 });
 
 # encode before any overload is known
-my $s = $encoder->encode(bless({foo => "123"} => "Str"));
+my $s = $encoder->encode(bless({foo => "123"} => "String"));
 
 my $decoder = Sereal::Decoder->new();
 
 
 # "load" the object's class
 eval <<'HERE';
-package Str;
+package String;
 use vars '$Called';
 $Called = 0;
 use overload '""' => sub {
@@ -60,8 +60,8 @@
 
 # see if overload magic is on object
 is("$obj", 123, "Deserialized object serializes fine");
-$Str::Called = $Str::Called; # silence warning
-is($Str::Called, 1, "overload invoked once");
+$String::Called = $String::Called; # silence warning
+is($String::Called, 1, "overload invoked once");
 
 
 # Second try at breaking things