Webstorm Karma Test Runner Not Working with Yeoman angular-fullstack

I created a web application using the Yeoman Angular-Fullstack generator. Everything runs correctly from the command line. I can use grunt to start the service and run tests.

I want to run the Karma unit tests inside the Webstorm user interface. I right clicked on

karma.conf.js

and had Webstorm create a Karma run configuration for me. When I try to run that configuration, it spins for a few seconds then fails.

The Karma Server window in Webstorm contains this:

/usr/local/bin/node /Applications/WebStorm.app/Contents/plugins/js-karma/js_reporter/karma-intellij/lib/intellijServer.js --karmaPackageDir=/Users/williammcneill/Documents/Work/LearnNode/gecko/node_modules/karma --configFile=/Users/williammcneill/Documents/Work/LearnNode/gecko/karma.conf.js
WARN [watcher]: Pattern "/Users/williammcneill/Documents/Work/LearnNode/gecko/client/bower_components/angular-route/angular-route.js" does not match any file.
WARN [watcher]: Pattern "/Users/williammcneill/Documents/Work/LearnNode/gecko/client/app/app.coffee" does not match any file.
WARN [watcher]: Pattern "/Users/williammcneill/Documents/Work/LearnNode/gecko/client/components/**/*.coffee" does not match any file.
WARN [watcher]: Pattern "/Users/williammcneill/Documents/Work/LearnNode/gecko/client/components/**/*.jade" does not match any file.
WARN [watcher]: Pattern "/Users/williammcneill/Documents/Work/LearnNode/gecko/client/app/**/*.coffee" does not match any file.
WARN [watcher]: Pattern "/Users/williammcneill/Documents/Work/LearnNode/gecko/client/app/**/*.jade" does not match any file.
INFO [karma]: Karma v0.12.37 server started at http://localhost:8080/
INFO [launcher]: Starting browser PhantomJS
INFO [PhantomJS 1.9.8 (Mac OS X 0.0.0)]: Connected on socket 29_J57vgWL6mWwyV13tv with id 98142631

Which all looks correct to me. The Test Run window contains this:

/usr/local/bin/node /Applications/WebStorm.app/Contents/plugins/js-karma/js_reporter/karma-intellij/lib/intellijRunner.js --karmaPackageDir=/Users/williammcneill/Documents/Work/LearnNode/gecko/node_modules/karma --serverPort=8080 --urlRoot=/
/Applications/WebStorm.app/Contents/plugins/js-karma/js_reporter/karma-intellij/lib/intellijRunner.js:54
      throw e;
      ^

Error: connect ETIMEDOUT 127.0.0.1:8080
    at Object.exports._errnoException (util.js:837:11)
    at exports._exceptionWithHostPort (util.js:860:20)
    at TCPConnectWrap.afterConnect [as oncomplete] (net.js:1060:14)

Process finished with exit code 1

I can't figure out what is timing out. If I open http://localhost:8080 I see a webpage that looks like this.


Which also looks correct to me.

I haven't actually written any code. I'm taking all the defaults that Yeoman and Webstorm give me. I think I have all the relevant Webstorm plugins (AngularJs, Karma).

Does anyone have insight into what might be happening or how I could debug it?

Webstorm 10.0.4, Yeoman 1.4.8, Karma 0.13.9, Node 4.1.0, OS X 10.10.5
Crossposted on Stack Overflow