diff --git a/activerecord/test/cases/associations_test.rb b/activerecord/test/cases/associations_test.rb
index 056a294..f7ad8b7 100644
--- a/activerecord/test/cases/associations_test.rb
+++ b/activerecord/test/cases/associations_test.rb
@@ -84,11 +84,18 @@ class AssociationsTest < ActiveRecord::TestCase
       assert_equal "Natural Company", db["apple"].clients.first.name
     end
   end
+  
 end
 
 class AssociationProxyTest < ActiveRecord::TestCase
   fixtures :authors, :posts, :categorizations, :categories, :developers, :projects, :developers_projects
-
+  
+  def test_backtracking_scoped_association_proxy_chain
+    count_without_class_method = authors(:david).categorizations.find(:all).select {|cz| cz.category.categorizations.size > 1 }.size
+    count_with_class_method = authors(:david).categorizations.that_have_siblings_with_common_category_parent.size
+    assert_equal(count_without_class_method,count_with_class_method)
+  end
+  
   def test_proxy_accessors
     welcome = posts(:welcome)
     assert_equal  welcome, welcome.author.proxy_owner
diff --git a/activerecord/test/models/categorization.rb b/activerecord/test/models/categorization.rb
index 1059432..1300f1e 100644
--- a/activerecord/test/models/categorization.rb
+++ b/activerecord/test/models/categorization.rb
@@ -2,4 +2,10 @@ class Categorization < ActiveRecord::Base
   belongs_to :post
   belongs_to :category
   belongs_to :author
+  
+  class << self
+    def that_have_siblings_with_common_category_parent
+      find(:all).select {|cz| cz.category.categorizations.size > 1 }
+    end
+  end
 end
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