2 files changed, 4 insertions, 2 deletions
diff --git a/activerecord/test/cases/base_test.rb b/activerecord/test/cases/base_test.rb
index 0f3f6e41a5..f9ac37cc87 100755
--- a/activerecord/test/cases/base_test.rb
+++ b/activerecord/test/cases/base_test.rb
@@ -2116,4 +2116,8 @@ class BasicsTest < ActiveRecord::TestCase
       assert_equal custom_datetime, parrot[attribute]
     end
   end
+
+  def test_dup
+    assert !Minimalistic.new.freeze.dup.frozen?
+  end
 end
diff --git a/activerecord/test/cases/helper.rb b/activerecord/test/cases/helper.rb
index c30186286d..d1e7caed89 100644
--- a/activerecord/test/cases/helper.rb
+++ b/activerecord/test/cases/helper.rb
@@ -6,8 +6,6 @@ require 'config'
 require 'rubygems'
 require 'test/unit'
 require 'stringio'
-gem 'mocha', '>= 0.9.5'
-require 'mocha'
 
 require 'active_record'
 require 'active_record/test_case'