$ mkdir mongotest
$ cd mongotest
$ npm install
$ cd node_modules/mongodb
$ npm test

npm ERR! Error: ENOENT, open '/home/user/mongotest/package.json'
npm ERR! If you need help, you may report this entire log,
npm ERR! including the npm and node versions, at:
npm ERR! <http://github.com/npm/npm/issues>

npm ERR! System Linux 3.2.0-4-amd64
npm ERR! command "/home/user/.nvm/v0.10.38/bin/node" "/home/user/.nvm/v0.10.38/bin/npm" "test"
npm ERR! cwd /home/user/mongotest
npm ERR! node -v v0.10.38
npm ERR! npm -v 1.4.28
npm ERR! path /home/user/mongotest/package.json
npm ERR! code ENOENT
npm ERR! errno 34
npm ERR!
npm ERR! Additional logging details can be found in:
npm ERR! /home/user/mongotest/npm-debug.log
npm ERR! not ok code 0