TypeError: Cannot set property '__set__' of undefined

[jludev1]

Got the following error when mock-fs is loaded in a QUnit test on mac.

npm test

> test@ test /Users/jlu/projects/test
> qunit-cli tests/*.js

/Users/jlu/projects/test/node_modules/mock-fs/node/fs-0.12.0.js:1887
module.exports.__set__ = function __set__() {
                       ^
TypeError: Cannot set property '__set__' of undefined
    at Object.<anonymous> (/Users/jlu/projects/test/node_modules/mock-fs/node/fs-0.12.0.js:1887:24)
    at Module._compile (module.js:460:26)
    at Object.Module._extensions..js (module.js:478:10)
    at Module.load (module.js:355:32)
    at Object.load (/Users/jlu/projects/test/node_modules/mock-fs/node_modules/rewire/lib/moduleEnv.js:19:18)
    at internalRewire (/Users/jlu/projects/test/node_modules/mock-fs/node_modules/rewire/lib/rewire.js:56:15)
    at rewire (/Users/jlu/projects/test/node_modules/mock-fs/node_modules/rewire/lib/index.js:11:12)
    at Object.<anonymous> (/Users/jlu/projects/test/node_modules/mock-fs/lib/index.js:42:14)
    at Module._compile (module.js:460:26)
    at Object.Module._extensions..js (module.js:478:10)
npm ERR! Test failed.  See above for more details.

Test:

var QUnit = require('qunit-cli');
var mock = require('mock-fs');

QUit.module('test');

test('test', function (assert){
  assert(strictEqual(1, 2));
})

Package.json

{
  "name": "test",
  "scripts": {
    "test": "node_modules/.bin/qunit-cli tests/*.js"
  },
  "devDependencies": {
    "mock-fs": "^3.0.0",
    "qunit-cli": "^0.2.0"
  }
}