gistfile1.diff

diff --git a/activerecord/test/cases/dirty_test.rb b/activerecord/test/cases/dirty_test.rb
index b1ce846..1b6fa95 100644
--- a/activerecord/test/cases/dirty_test.rb
+++ b/activerecord/test/cases/dirty_test.rb
@@ -150,6 +150,13 @@ class DirtyTest < ActiveRecord::TestCase
     assert_equal parrot.name_change, parrot.title_change
   end
 
+  def test_change_attribute_using_gsub
+    parrot = Parrot.create(:name => 'test')
+    parrot.name.gsub(/te/, '')
+    assert_equal('st', parrot.name)
+    assert_equal({'name' => ['test', 'st']}, parrot.changes)
+  end
+
   def test_reset_attribute!
     pirate = Pirate.create!(:catchphrase => 'Yar!')
     pirate.catchphrase = 'Ahoy!'