machine:
  node:
    version: v5
test:
  pre:
    - npm install -g bower
    - npm install -g grunt-cli

machine:
  node:
    version: v5.10.0
test:
  pre:
    - npm install -g bower
    - npm install -g grunt-cli

Use Node v5.10.0 in test environment
Use Node v5.10.0 in test environment
