If you're seeing errors like this when you run Rails tests:
# NoMethodError: You have a nil object when you didn't expect it!
You might need to edit test/test_helper.rb to make sure use_instantiated_fixtures is true:
self.use_instantiated_fixtures = true
Prior to 1.0, Rails automatically created instance variables out of fixtures. So if you had a fixture record named "foo", you could access it in your test as "@foo". As of 1.0, the default is to disable that feature, which breaks a lot of existing code. Mike Clark explains the change.