Check out the introduction post about the chrome extension.

git clone git@github.com:mpociot/laravel-testtools.git

# in case you don't have Grunt yet:
sudo npm install -g grunt-cli

cd laravel-testtools
npm install
grunt

When the grunt command is finished, you can use the build/unpacked-dev/ folder to use as the developer version of the extension.

Laravel TestTools is free software distributed under the terms of the MIT license.