1 files changed, 2 insertions, 2 deletions
diff --git a/activesupport/test/core_ext/duplicable_test.rb b/activesupport/test/core_ext/duplicable_test.rb
index e48e6a7c45..3e54266051 100644
--- a/activesupport/test/core_ext/duplicable_test.rb
+++ b/activesupport/test/core_ext/duplicable_test.rb
@@ -3,7 +3,7 @@ require 'bigdecimal'
 require 'active_support/core_ext/object/duplicable'
 require 'active_support/core_ext/numeric/time'
 
-class DuplicableTest < Test::Unit::TestCase
+class DuplicableTest < ActiveSupport::TestCase
   RAISE_DUP  = [nil, false, true, :symbol, 1, 2.3, BigDecimal.new('4.56'), 5.seconds]
   YES = ['1', Object.new, /foo/, [], {}, Time.now]
   NO = [Class.new, Module.new]
@@ -22,7 +22,7 @@ class DuplicableTest < Test::Unit::TestCase
     end
 
     RAISE_DUP.each do |v|
-      assert_raises(TypeError) do
+      assert_raises(TypeError, v.class.name) do
         v.dup
       end
     end