Uncaught Error: Could not find module `ember-qunit`. Odd out-of-the-box ember-cli behavior

I believe I may have an environment issue here, but I'm quite stuck as to what I can to do resolve it. I created an ember-cli project, committed it to git, added a few things. I ran the typical npm install && bower install commands and tried ember s.

Although the site loads fine, when I browsed to the http://localhost:4200/tests/ to ensure qunit was up and running, I had a few errors.

Uncaught Error: Could not find module `ember-qunit` imported from `ember-project/tests/test-helper

Uncaught Error: Assertion Failed: The tests file was not loaded. Make sure your tests index.html includes "assets/tests.js".

Immediately this raised a red flag, as I have created several ember projects before and not run into similar issues. I had my partners (I'm in school) checkout the project, run the npm install && bower install && ember s and the qunit module worked fine for them!

I've tried to git clone a new repo several times, I've even went so far as to uninstall node and bower completely, but no matter what I try I cannot seem to pull up a normal /tests checkout.

My partners were both running VMs - Ubuntu and Debian, while I'm on a mac, but that seems like it shouldn't be too big of an issue, especially since I created the project!

I've looked several places for this (here, here, and here), but I cannot seem to come to a conclusion which works for me.

I do have an identical bower.json as the rest of my group. I've included the picture below of my file structure, my bower.json, and my tests/index.html.

screenshot

Here are some environment stats:

ember version: 1.13.13
node: 5.0.0
os: darwin x64
bower: 1.7.1

One thing that I did notice is a difference when I do this to see npm's version, but I'm not sure if that matters or not.

ember -v
  npm: 2.14.10
npm -v
  npm: 3.5.2