diff --git a/test/activerecord_test.rb b/test/activerecord_test.rb
index e345de9..a7e197a 100644
--- a/test/activerecord_test.rb
+++ b/test/activerecord_test.rb
@@ -75,6 +75,7 @@
     t.string :foo
     t.boolean :newsletter_subscribed, default: true
     t.json :store_accessor_store_with_no_defaults
+    t.string :locale
   end
 
   create_table :documents do |t|
@@ -114,6 +115,9 @@ class User < ActiveRecord::Base
   enumerize :language, :in => [:en, :jp]
   enumerize :country_code, :in => [:us, :ca]
 
+  normalizes :locale, with: ->(value) { value.downcase.strip.presence }
+  enumerize :locale, :in => [:de, :en, :pl]
+
   serialize :interests, type: Array
   enumerize :interests, :in => [:music, :sports, :dancing, :programming], :multiple => true
 
@@ -754,4 +758,15 @@ class AdminUser < User
     expect(User.exists?(status: :active)).must_equal true
     expect(User.exists?(interests: [:music, :sports])).must_equal true
   end
+
+  it 'supports AR#normalizes class methods' do
+    User.delete_all
+    User.create!(locale: 'de')
+    expect(User.exists?(locale: ' DE ')).must_equal true
+  end
+
+  it 'supports AR#normalizes instance methods' do
+    user = User.new(locale: ' DE ')
+    expect(user.locale).must_equal 'de'
+  end
 end