Test is broken due to NullException

[naxxfish]

    this.username = user.username;
                         ^

TypeError: Cannot read property 'username' of null
    at new wmic (E:\dev\ohwm2graphite\ohwm2graphite\node_modules\wmi-client\lib\wmic.js:20:26)
    at Object.<anonymous> (E:\dev\ohwm2graphite\ohwm2graphite\node_modules\wmi-client\test\index.js:5:11)
    at Module._compile (module.js:635:30)
    at Object.Module._extensions..js (module.js:646:10)
    at Module.load (module.js:554:32)
    at tryModuleLoad (module.js:497:12)
    at Function.Module._load (module.js:489:3)
    at Function.Module.runMain (module.js:676:10)
    at startup (bootstrap_node.js:187:16)
    at bootstrap_node.js:608:3
npm ERR! Test failed.  See above for more details.

The getUsername function returns null if it's provided with an empty string or null, therefore the test script (which passes username: null in it's options) gets null back, and therefore a call to user.username in wmic.js subsequently fails