ansible/test/integration/targets/vyos_smoke/tests/cli/misc_tests.yaml

# hit check conditional in module_utils.network.vyos -> load_config()
- name: configure simple config command
  vyos_config:
    lines: set system host-name check-test
  check_mode: yes

- name: get host name
  vyos_command:
    commands: show host name
  register: result

- assert:
    that: '"check-test" not in result.stdout'