ansible/test/integration/targets/handlers/46447.yml

- hosts: A,B
  gather_facts: no
  any_errors_fatal: True
  tasks:
    - command: /bin/true
      notify: test_handler

    - meta: flush_handlers

    - name: Should not get here
      debug:
        msg: "SHOULD NOT GET HERE"

  handlers:
    - name: test_handler
      command: /usr/bin/{{ (inventory_hostname == 'A') | ternary('true', 'false') }}