ansible/test/integration/targets/handlers/test_handlers_any_errors_fatal.yml

- hosts:
    - A
    - B
  gather_facts: no
  any_errors_fatal: yes
  vars:
    output_dir: /tmp
  tasks:
    - name: Task one
      debug:
        msg: 'task 1'
      changed_when: yes
      notify: EXPECTED FAILURE failed_handler

    - meta: flush_handlers

    - name: This task should never happen
      file:
        path: "{{ output_dir }}/should_not_exist_{{ inventory_hostname }}"
        state: touch
  handlers:
    - name: EXPECTED FAILURE failed_handler
      fail:
      when: 'inventory_hostname == "A"'