npm run test:browser fails

Script exits with:

```
Chrome 51.0.2704 (Mac OS X 10.11.5) LOG: 'Random-ness seed: 1467317530729'

Chrome 51.0.2704 (Mac OS X 10.11.5) ERROR: 'Error: Script error. (:0)
    at window.onerror (http://localhost:5610/bundles/tests.bundle.js:65044:23)'

Chrome 51.0.2704 (Mac OS X 10.11.5): Executed 0 of 0 ERROR (0.001 secs / 0 secs)
Warning: Task "karma:unit" failed. Use --force to continue.
```
