Running rspec tests in Sublime Text 2

To be able to run spec tests from within Sublime Text 2:

Menu choice: Tools > Build System > New Build System...

Then enter:

    {
      "cmd": ["bundle", "exec", "rspec", "$file"],
      "working_dir": "${project_path:${folder}}",
      "file_regex": "^(...*?):([0-9]*):?([0-9]*)",
      "selector": "source.ruby"
    }

Thanks to http://wesbos.com/sublime-text-build-scripts/