fixtures:
  repositories:
    'stdlib': git://github.com/puppetlabs/puppetlabs-stdlib.git
  symlinks:
    'gai': "#{source_dir}"

fixtures:
  repositories:
    'stdlib':
      repo: 'git://github.com/puppetlabs/puppetlabs-stdlib.git'
      ref: '4.2.0'
  symlinks:
    'gai': "#{source_dir}"

Set stdlib version for tests to 4.2.0
Set stdlib version for tests to 4.2.0
