Awesome
Guard::Konacha 
Automatically run your Konacha tests through Guard.
Install
If you haven't already, start by installing and configuring Konacha. Then add the guard-konacha gem to your Gemfile:
# Gemfile
gem 'guard-konacha'
And install
$ bundle install
Setup
Add the default configurations to your Guardfile.
$ bundle exec guard init konacha
Run
And that's it. Your Konacha powered JavaScript tests will now run whenever your JavaScript assets or spec files change.
$ bundle exec guard
Additionally
I recommend using the capybara-webkit or poltergeist drivers rather than the default selenium based driver. See Konacha instructions.
To get system notifications see Guard instructions.