There is - in `spec_handler.rb`, set:
```ruby
c.default_cassette_options = {
    :record => :all, # currently :once
    # :record => :new_episodes, # uncomment during development
  }
```
And then examine the diff. Or simply delete them all and run `rake` again. :gem:
I did this heavily in test development when I kept restructuring and renaming tests - as the cassettes are named baed on the test case.