diff --git a/bootstraptest/test_knownbug.rb b/bootstraptest/test_knownbug.rb
index 97c8e1063c..f4e8875354 100644
--- a/bootstraptest/test_knownbug.rb
+++ b/bootstraptest/test_knownbug.rb
@@ -13,4 +13,4 @@ assert_equal '0', %q{
 assert_match /unterminated string meets end of file/, %q{
   STDERR.reopen(STDOUT)
   eval("\"\xfd".force_encoding("utf-8"))
-}
+}, '[ruby-dev:32429]'