diff --git a/test/helper.rb b/test/helper.rb
index f696fa0..8f9e408 100644
--- a/test/helper.rb
+++ b/test/helper.rb
@@ -1,6 +1,8 @@
 # coding: us-ascii
 # frozen_string_literal: true
 
+# TODO: Remove this line after #495
+
 # How to use: https://github.com/jeremyevans/ruby-warning
 require('warning')