diff --git a/activerecord/lib/active_record/autosave_association.rb b/activerecord/lib/active_record/autosave_association.rb
index 803191266944cc92572dbba0564252c701f3e2ec..d468663084ed0656eec61fe045f5e9c5fef82d02 100644
--- a/activerecord/lib/active_record/autosave_association.rb
+++ b/activerecord/lib/active_record/autosave_association.rb
@@ -295,7 +295,7 @@ def validate_collection_association(reflection)
     def association_valid?(reflection, record)
       return true if record.destroyed? || record.marked_for_destruction?
 
-      unless valid = record.valid?
+      unless valid = record.valid?(validation_context)
         if reflection.options[:autosave]
           record.errors.each do |attribute, message|
             attribute = "#{reflection.name}.#{attribute}"
diff --git a/activerecord/lib/active_record/validations/associated.rb b/activerecord/lib/active_record/validations/associated.rb
index 9f072c4c39f1a16002586c28e37e02ef5be268b2..afce149da90476d6632d0cf18d77bf6707913735 100644
--- a/activerecord/lib/active_record/validations/associated.rb
+++ b/activerecord/lib/active_record/validations/associated.rb
@@ -2,7 +2,7 @@ module ActiveRecord
   module Validations
     class AssociatedValidator < ActiveModel::EachValidator
       def validate_each(record, attribute, value)
-        if Array.wrap(value).reject {|r| r.marked_for_destruction? || r.valid?}.any?
+        if Array.wrap(value).reject {|r| r.marked_for_destruction? || r.valid?(record.validation_context) }.any?
           record.errors.add(attribute, :invalid, options.merge(:value => value))
         end
       end
diff --git a/activerecord/test/cases/validations/association_validation_test.rb b/activerecord/test/cases/validations/association_validation_test.rb
index f155b9bc40d5b1411b363433ec667892241467a6..c72b7b35cd8736e43a192e1d7985790a45dc8fbe 100644
--- a/activerecord/test/cases/validations/association_validation_test.rb
+++ b/activerecord/test/cases/validations/association_validation_test.rb
@@ -118,4 +118,21 @@ def test_validates_presence_of_belongs_to_association__existing_parent
     end
   end
 
+  def test_validates_associated_models_in_the_same_context
+    Topic.validates_presence_of :title, :on => :custom_context
+    Topic.validates_associated :replies
+    Reply.validates_presence_of :title, :on => :custom_context
+
+    t = Topic.new('title' => '')
+    r = t.replies.new('title' => '')
+
+    assert t.valid?
+    assert !t.valid?(:custom_context)
+
+    t.title = "Longer"
+    assert !t.valid?(:custom_context), "Should NOT be valid if the associated object is not valid in the same context."
+
+    r.title = "Longer"
+    assert t.valid?(:custom_context), "Should be valid if the associated object is not valid in the same context."
+  end
 end