diff --git a/test/integration/action_controller/serialization_test.rb b/test/integration/action_controller/serialization_test.rb
index 9e05e904..7ffd4c56 100644
--- a/test/integration/action_controller/serialization_test.rb
+++ b/test/integration/action_controller/serialization_test.rb
@@ -1,5 +1,4 @@
 require 'test_helper'
-require 'json'
 
 module ActionController
   module Serialization