diff --git a/test/psych/test_deprecated.rb b/test/psych/test_deprecated.rb
index cfce0825e9..3740b6f31c 100644
--- a/test/psych/test_deprecated.rb
+++ b/test/psych/test_deprecated.rb
@@ -145,7 +145,7 @@ module Psych
     end
 
     class YamlAs
-      yaml_as 'helloworld'
+      psych_yaml_as 'helloworld' # this should be yaml_as but to avoid syck
     end
 
     def test_yaml_as