This project provides a Karma wrapper that ensures both ES6 and ES5 shims are available, enabling testing of ES6 features in environments like PhantomJS that lack native ES5/ES6 support. It's particularly useful for developers using Karma with PhantomJS who need to test ES6 code and are using tools like RequireJS for module loading. The package is ideal for those who already use es6-shim in their HTML and require AMD-based module loading.