Fix failing AP test

actionpack/test/dispatch/request/json_params_parsing_test.rb

@@ -50,7 +50,7 @@ class JsonParamsParsingTest < ActionDispatch::IntegrationTest
       output = StringIO.new
       json = "[\"person]\": {\"name\": \"David\"}}"
       post "/parse", json, {'CONTENT_TYPE' => 'application/json', 'action_dispatch.show_exceptions' => true, 'action_dispatch.logger' => ActiveSupport::Logger.new(output)}
-      assert_response :error
+      assert_response :bad_request
       output.rewind && err = output.read
       assert err =~ /Error occurred while parsing request parameters/
     end