1..9
ok 1 - base requires 'attr' at construction
ok 2 - The object isa My::Base
ok 3 - base is correct
ok 4 - derived doesn't require 'attr' at construction
ok 5 - The object isa My::Derived
not ok 6 - derived is correct
#   Failed test 'derived is correct'
#   at foobar.pl line 43.
#          got: 'default value'
#     expected: 'The value of attr is 'default value''
ok 7 - inherited requires 'attr' at construction
ok 8 - The object isa My::Inherited
ok 9 - inherited is correct
# Looks like you failed 1 test of 9.