diff --git a/activesupport/test/core_ext/object/duplicable_test.rb b/activesupport/test/core_ext/object/duplicable_test.rb
index 042f5cf..c2d7c15 100644
--- a/activesupport/test/core_ext/object/duplicable_test.rb
+++ b/activesupport/test/core_ext/object/duplicable_test.rb
@@ -4,9 +4,13 @@
require 'active_support/core_ext/numeric/time'
class DuplicableTest < ActiveSupport::TestCase
- RAISE_DUP = [nil, false, true, :symbol, 1, 2.3, method(:puts)]
- ALLOW_DUP = ['1', Object.new, /foo/, [], {}, Time.now, Class.new, Module.new]
- ALLOW_DUP << BigDecimal.new('4.56')
+ if RUBY_VERSION >= "2.4.0"
+ RAISE_DUP = [method(:puts)]
+ ALLOW_DUP = ["1", Object.new, /foo/, [], {}, Time.now, Class.new, Module.new, BigDecimal.new("4.56"), nil, false, true, :symbol, 1, 2.3]
+ else
+ RAISE_DUP = [nil, false, true, :symbol, 1, 2.3, method(:puts)]
+ ALLOW_DUP = ["1", Object.new, /foo/, [], {}, Time.now, Class.new, Module.new, BigDecimal.new("4.56")]
+ end
def test_duplicable
rubinius_skip "* Method#dup is allowed at the moment on Rubinius\n" \