Tips for posting: Don't reply to someone else's thread and change the name. Start a new thread with your New button. Now to your problem - is this a typo? > End The code should not compile with that error, but your stack trace implies you started executing. However... > C:\ruby>ruby -rubygems -rdebug unittest.rb You might need -rrubygems. Next, report what happens without the -rdebug. I never debug unit tests - they tend to help you avoid excess debugging! -- Phlip