diff --git a/activerecord/test/cases/validations_test.rb b/activerecord/test/cases/validations_test.rb
index c20f5ae..6c3f41c 100644
--- a/activerecord/test/cases/validations_test.rb
+++ b/activerecord/test/cases/validations_test.rb
@@ -916,6 +916,31 @@ class ValidationsTest < ActiveRecord::TestCase
     end
   end
 
+  def test_validates_size_of_association_using_nested_attributes
+    require 'models/pirate'
+    require 'models/bird'
+    repair_validations(Pirate) do
+      # A validation that does not work:
+      # assert_nothing_raised { Pirate.validates_size_of :birds, :minimum => 1 }
+      # A validation that works:
+      # assert_nothing_raised do
+      #   Pirate.validates_each(:birds) do |record, attr, value|
+      #     record.errors.add attr, 'is too short.' if value.reject { |v| v.marked_for_destruction? }.size < 1
+      #   end
+      # end
+      p = Pirate.new('catchphrase' => 'hey!!')
+      assert !p.save
+      assert p.errors.on(:birds)
+      bird = p.birds.build('name' => 'birdname')
+      assert p.valid?
+      assert p.save
+      bird = p.birds.first
+      p.attributes = {:birds_attributes => { '1' => {:_delete => 1, :id => bird.id} } }
+      assert !p.valid?
+      assert p.errors.on(:birds)
+    end
+  end
+
   def test_validates_size_of_association_using_within
     repair_validations(Owner) do
       assert_nothing_raised { Owner.validates_size_of :pets, :within => 1..2 }