Attempt to fix test
TypeError: Arguments to path.resolve must be strings
    at Object.exports.resolve (path.js:313:15)
    at Object.module.exports.B.extend.create (./node_modules/buster-configuration/lib/group.js:167:28)
    at Object.module.exports.addGroup (./node_modules/buster-configuration/lib/buster-configuration.js:44:29)
    at Object.buster.testCase.adds bundle as framework (./test/extension-test.js:13:28)