title: Is there a way to undo Mocha stubbing of any_instance in Test::Unit
body: <p>Much like <a href="https://stackoverflow.com/questions/2697168/is-there-a-way-to-undo-mocha-stubbing-of-any-instance">this question</a>, I too am using Ryan Bates's nifty_scaffold. It has the desirable aspect of using Mocha's <a href="http://mocha.rubyforge.org/classes/Mocha/ClassMethods.html#M000001" rel="noreferrer">any_instance</a> method to force an "invalid" state in model objects buried behind the controller.</p>
  
  <p>Unlike the question I linked to, I'm not using RSpec, but Test::Unit. That means that the two RSpec-centric solutions there won't work for me.</p>
  
  <p>Is there a general (ie: works with Test::Unit) way to remove the any_instance stubbing? I believe that it's causing a bug in my tests, and I'd like to verify that.</p>