Vagrant trick: upgrade Puppet, update apt-get, and install Puppet modules before the Puppet provisioner runs.

vagrant-prereq.pp

# Manifest to install Puppet modules for Vagrant.

$vpup = '/opt/vagrant_ruby/bin/puppet'
$vmods = '/tmp/vagrant-puppet/modules'

define vpupmod() {
  $modulename = inline_template('<%= name.split("/")[1] %>')
  exec { "install module ${name}":
    command => "${vpup} module install ${name} --modulepath ${vmods}",
    creates => "${vmods}/${modulename}",
  }
}

vpupmod { ['cprice404/inifile', 'puppetlabs/stdlib']: }

Vagrantfile

    MANIFESTS = [
      'vagrant-prereq.pp', # prerequisites, e.g. other Puppet modules
      'vagrant.pp'         # the Logstash configuration we're testing
    ]

    # Run the Puppet provisioner for each manifest
    for manifest in MANIFESTS
      ls.vm.provision :puppet do |puppet|
        puppet.manifests_path = "tests"
        puppet.manifest_file = manifest
        puppet.options = ["--modulepath", "/tmp/vagrant-puppet/modules"]
      end
    end