HabitRPG test run error

npm test output

vagrant@habitrpg:/vagrant$ npm test

> habitrpg@0.0.0-152 test /vagrant
> ./test/run_tests.sh

Running "stylus:build" (stylus) task
File build/app.css created.
File build/static.css created.

Done, without errors.
Recreating test database
MongoDB shell version: 2.0.4
connecting to: habitrpg_test
[object bson_object]
selenium standalone is up to date.
chromedriver is up to date.
execvp(): No such file or directory

events.js:72
        throw er; // Unhandled 'error' event
              ^
Error: spawn ENOENT
    at errnoException (child_process.js:988:11)
    at Process.ChildProcess._handle.onexit (child_process.js:779:34)
Waited 30 seconds, but Selenium never responded
kill: usage: kill [-s sigspec | -n signum | -sigspec] pid | jobspec ... or kill -l [sigspec]
curl: (7) couldn't connect to host
npm ERR! Test failed.  See above for more details.
npm ERR! not ok code 0