generator-chrome-extension: grunt test -> "Warning: PhantomJS timed out, possibly due to a missing Mocha run() call."

Using: generator-chrome-extension v0.2.5 node v0.10.26 Windows 7 64-bit

On a freshly generated project, running grunt test results in

Testing: http://localhost:9000/index.html


Warning: PhantomJS timed out, possibly due to a missing Mocha run() call. Use --
force to continue.

Aborted due to warnings.

after a few seconds. However, if I pull up the URL it’s accessing (after the connect task starts up the server, before that message appears), I see that Mocha has run the test just fine.

Also possibly noteworthy: if I deliberately make the test fail (adding in a throw;), then the task completes, with:

Testing: http://localhost:9000/index.html


  0 tests complete (0 ms)

>> 0 passed! (0.00s)

Done, without errors.