Is automatically enabled in puppetlabs_spec_helper. Here are the builtin rake tasks:

````
⌘ > rake -T
rake build            # Build puppet module package
rake clean            # Clean a built module package
rake coverage         # Generate code coverage information
rake help             # Display the list of available rake tasks
rake lint             # Check puppet manifests with puppet-lint
rake spec             # Run spec tests in a clean fixtures directory
rake spec_clean       # Clean up the fixtures directory
rake spec_prep        # Create the fixtures directory
rake spec_standalone  # Run spec tests on an existing fixtures directory
```