sudo: false
language: node_js
node_js:
  - "4"
  - "5"
  - "6"
  - "7"

before_install:
  - travis_retry npm install -g npm@2.14.5
  - travis_retry npm install

script:
  - npm test

sudo: false
language: node_js
node_js:
  - "4"
  - "5"
  - "6"
  - "7"

before_install:
  - travis_retry npm install

script:
  - npm test

Remove npm install npm line
Remove npm install npm line

Travis provides this out of the box
