diff --git a/test/ruby/test_process.rb b/test/ruby/test_process.rb
index eed156b089..00fc6199e9 100644
--- a/test/ruby/test_process.rb
+++ b/test/ruby/test_process.rb
@@ -1161,7 +1161,7 @@ class TestProcess < Test::Unit::TestCase
         system(RUBY, "-e", "exit true")
         status = $?
       }
-      assert(status.success?)
+      assert(status.success?, "[ruby-dev:38105]")
     }
   end
 end