diff --git a/lib/couchrest/model/base.rb b/lib/couchrest/model/base.rb
index f9bcec9..8ae8cac 100644
--- a/lib/couchrest/model/base.rb
+++ b/lib/couchrest/model/base.rb
@@ -21,6 +21,7 @@ module CouchRest
       include CouchRest::Model::Designs
       include CouchRest::Model::CastedBy
       include CouchRest::Model::Dirty
+      include CouchRest::Model::Callbacks
 
       def self.subclasses
         @subclasses ||= []
diff --git a/lib/couchrest/model/casted_model.rb b/lib/couchrest/model/casted_model.rb
index aa27e0a..0074e18 100644
--- a/lib/couchrest/model/casted_model.rb
+++ b/lib/couchrest/model/casted_model.rb
@@ -12,6 +12,8 @@ module CouchRest::Model
       include CouchRest::Model::Callbacks
       include CouchRest::Model::CastedBy
       include CouchRest::Model::Dirty
+      include CouchRest::Model::Callbacks
+
       class_eval do
         # Override CastedBy's base_doc?
         def base_doc?
diff --git a/spec/fixtures/models/base.rb b/spec/fixtures/models/base.rb
index 65fabfa..b64df11 100644
--- a/spec/fixtures/models/base.rb
+++ b/spec/fixtures/models/base.rb
@@ -83,6 +83,17 @@ class WithCallBacks < CouchRest::Model::Base
   end
 end
 
+# Following two fixture classes have __intentionally__ diffent syntax for setting the validation context
+class WithContextualValidationOnCreate < CouchRest::Model::Base
+  property(:name, String)
+  validates(:name, :presence => {:on => :create})
+end
+
+class WithContextualValidationOnUpdate < CouchRest::Model::Base
+  property(:name, String)
+  validates(:name, :presence => true, :on => :update)
+end
+
 class WithTemplateAndUniqueID < CouchRest::Model::Base
   use_database TEST_SERVER.default_database
   unique_id do |model|
diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
index 284d0d1..d04b99f 100644
--- a/spec/spec_helper.rb
+++ b/spec/spec_helper.rb
@@ -1,9 +1,6 @@
 $LOAD_PATH.unshift(File.dirname(__FILE__))
 $LOAD_PATH.unshift(File.join(File.dirname(__FILE__), "..", "lib"))
 
-MODELS = File.join(File.dirname(__FILE__), "fixtures", "models")
-$LOAD_PATH.unshift(MODELS)
-
 require "bundler/setup"
 require "rubygems"
 require "rspec"
@@ -11,6 +8,9 @@ require "rspec"
 require 'couchrest_model'
 
 unless defined?(FIXTURE_PATH)
+  MODEL_PATH = File.join(File.dirname(__FILE__), "fixtures", "models")
+  $LOAD_PATH.unshift(MODEL_PATH)
+
   FIXTURE_PATH = File.join(File.dirname(__FILE__), '/fixtures')
   SCRATCH_PATH = File.join(File.dirname(__FILE__), '/tmp')
 
@@ -34,7 +34,7 @@ RSpec.configure do |config|
 end
 
 # Require each of the fixture models
-Dir[ File.join(MODELS, "*.rb") ].sort.each { |file| require File.basename(file) }
+Dir[ File.join(MODEL_PATH, "*.rb") ].sort.each { |file| require File.basename(file) }
 
 class Basic < CouchRest::Model::Base
   use_database TEST_SERVER.default_database
diff --git a/spec/unit/persistence_spec.rb b/spec/unit/persistence_spec.rb
index 3a8a042..e8f78ac 100644
--- a/spec/unit/persistence_spec.rb
+++ b/spec/unit/persistence_spec.rb
@@ -356,6 +356,27 @@ describe CouchRest::Model::Persistence do
       end
     end
 
+    describe "with contextual validation on ”create”" do
+      it "should validate only within ”create” context" do
+        doc = WithContextualValidationOnCreate.new
+        doc.save.should be_false
+        doc.name = "Alice"
+        doc.save.should be_true
+
+        doc.update_attributes(:name => nil).should be_true
+      end
+    end
+
+    describe "with contextual validation on ”update”" do
+      it "should validate only within ”update” context" do
+        doc = WithContextualValidationOnUpdate.new
+        doc.save.should be_true
+
+        doc.update_attributes(:name => nil).should be_false
+        doc.update_attributes(:name => "Bob").should be_true
+      end
+    end
+
     describe "save" do
       it "should run the after filter after saving" do
         @doc.run_after_save.should be_nil