---
- hosts: all

  pre_tasks:
    - name: Update apt cache.
      apt: update_cache=yes cache_valid_time=600
      when: ansible_os_family == 'Debian'
      changed_when: false

    - name: Install cron (RedHat).
      yum: name=cronie state=present
      when: ansible_os_family == 'RedHat'

    - name: Install cron (Debian).
      apt: name=cron state=present
      when: ansible_os_family == 'Debian'

  roles:
    - role_under_test