diff --git a/lib/Test2/Tools/Mock.pm b/lib/Test2/Tools/Mock.pm
index 26da56975..91f33b6e7 100644
--- a/lib/Test2/Tools/Mock.pm
+++ b/lib/Test2/Tools/Mock.pm
@@ -188,7 +188,8 @@ sub _generate_class {
     my $prefix = __PACKAGE__;
 
     for (1 .. 100) {
-        my $postfix = join '', map { chr(rand(26) + 65) } 1 .. 32;
+        my $postfix = join '', map { chr(utf8::unicode_to_native(rand(26) + 65))
+                                   } 1 .. 32;
         my $class = $prefix . '::__TEMP__::' . $postfix;
         my $file = $class;
         $file =~ s{::}{/}g;
diff --git a/t/modules/Tools/Compare.t b/t/modules/Tools/Compare.t
index a22b81785..537df6dc9 100644
--- a/t/modules/Tools/Compare.t
+++ b/t/modules/Tools/Compare.t
@@ -154,12 +154,12 @@ subtest is => sub {
 
             fail_table(
                 header => [qw/GOT OP CHECK/],
-                rows   => [["\N{U+1}\N{U+2}\N{U+3}", 'eq', "\N{U+1}\N{U+2}\N{U+4}"]],
+                rows   => [["\x{01}\x{02}\x{03}", 'eq', "\x{01}\x{02}\x{04}"]],
             );
 
             fail_table(
                 header => [qw/PATH GOT OP CHECK/],
-                rows   => [['$*', "\N{U+1}\N{U+2}\N{U+3}", 'eq', "\N{U+1}\N{U+2}\N{U+4}"]],
+                rows   => [['$*', "\x{01}\x{02}\x{03}", 'eq', "\x{01}\x{02}\x{04}"]],
             );
 
             event Ok => sub {