I use the deep-test ruby gem to run tests in parallel from a rake task. I want to be able to right click on a folder and run tests in parallel, in addition to the run tests option. I thought of researching the run options for spec tests and seeing if I could create a custom runner and put my rake task code into the runner. I don't think this level of customization exists. The run test in folder feature is extremely valuable, I would really like to have the run in parallel option.