It's happening on a fresh install, on first npm test run:
1) Unit Tests - Ward reportCount virtual property "before all" hook:
Error: timeout of 2000ms exceeded. Ensure the done() callback is being called in this test.
It's happening in /test/unit/ward.js.
If test is passing for other people, I'm guessing the issue is not in the code, but in something missing in the install doc. Will investigate.