ansible/test/integration/targets/callback_default/test_async.yml

---
- hosts: testhost
  gather_facts: no
  tasks:
      - name: test success async output
        command: sleep 1
        async: 10
        poll: 1

      - name: test failure async output
        command: sleep 10
        async: 1
        poll: 1
        ignore_errors: yes