diff --git a/activesupport/test/string_inquirer_test.rb b/activesupport/test/string_inquirer_test.rb
index 69d01fe26d..79a715349c 100644
--- a/activesupport/test/string_inquirer_test.rb
+++ b/activesupport/test/string_inquirer_test.rb
@@ -37,7 +37,7 @@ class StringInquirerTest < ActiveSupport::TestCase
     String.class_eval do
       undef_method :respond_to_missing?
       def respond_to_missing?(name, include_private = false)
-        (name == :bar) || super
+        super
       end
     end
   end