CONTRIBUTING.md in berkshelf-1.4.6 vs CONTRIBUTING.md in berkshelf-2.0.0.beta

@@ -32,10 +32,12 @@
 
 Bundler will install all gems and their dependencies required for testing and developing.
 
 ### Running unit (RSpec) and acceptance (Cucumber) tests
 
-We use Chef Zero - an in-memory Chef Server for running tests. It is automatically managed by the Specs and Cukes. Simply run:
+Simply copy the `spec/knife.rb.sample` to `spec/knife.rb`, and point it at a
+chef server. Berkshelf tests may upload and destroy cookbooks on your chef
+server, so be sure to configure a server safe for this task.
 
     $ bundle exec guard start
 
 See [here](https://github.com/tdegrunt/vagrant-chef-server-bootstrap) for a
 quick way to get a testing chef server up.