travis running my tests against different versions of ember

I have this repo which uses ember 1.11.0.

My bower.json looks like this:

{
  "name": "emberx-autosuggest",
  "dependencies": {
    "ember": "1.11.1",
    "ember-cli-shims": "ember-cli/ember-cli-shims#0.0.3",
    "ember-cli-test-loader": "ember-cli-test-loader#0.1.3",
    "ember-data": "1.0.0-beta.16.1",
    "ember-load-initializers": "ember-cli/ember-load-initializers#0.1.4",
    "ember-qunit": "0.3.1",
    "ember-qunit-notifications": "0.0.7",
    "ember-resolver": "~0.1.15",
    "jquery": "^1.11.1",
    "loader.js": "ember-cli/loader.js#3.2.0",
    "qunit": "~1.17.1"
  }
}

My tests all pass locally but when I push to github, travis appears to be running my tests against ember 1.10.0, 1.11.0 and 1.12.0-beta.1.

I only want to run against 1.11.0, how can I configure travis to do this?

My travis.yml looks like this:

---
language: node_js
node_js:
  - "0.12"

sudo: false

cache:
  directories:
    - node_modules

before_install:
  - "npm config set spin false"
  - "npm install -g npm@^2"

install:
  - npm install -g bower
  - npm install
  - bower install

script:
  - npm test