1 files changed, 8 insertions, 0 deletions
diff --git a/activerecord/lib/active_record/type/serialized.rb b/activerecord/lib/active_record/type/serialized.rb
index 6af05c1860..0a2f6cb9fb 100644
--- a/activerecord/lib/active_record/type/serialized.rb
+++ b/activerecord/lib/active_record/type/serialized.rb
@@ -1,6 +1,10 @@
+# frozen_string_literal: true
+
 module ActiveRecord
   module Type
     class Serialized < DelegateClass(ActiveModel::Type::Value) # :nodoc:
+      undef to_yaml if method_defined?(:to_yaml)
+
       include ActiveModel::Type::Helpers::Mutable
 
       attr_reader :subtype, :coder
@@ -47,6 +51,10 @@ module ActiveRecord
         end
       end
 
+      def force_equality?(value)
+        coder.respond_to?(:object_class) && value.is_a?(coder.object_class)
+      end
+
       private
 
         def default_value?(value)