- hosts: localhost
  become_user: root
  become: true

  tasks:
  - debug:
      msg: hello

- hosts: localhost

  tasks:
  - command: whoami
    become_user: postgres
    become: true

- hosts: localhost
  become: true

  tasks:
  - name: Accepts a become from higher scope
    command: whoami
    become_user: postgres

- hosts: localhost
  become_user: postgres

  tasks:
  - name: Accepts a become from a lower scope
    command: whoami
    become: true