community.general/test/integration/targets/module_precedence/modules_test_multiple_roles.yml

- hosts: localhost
  gather_facts: no
  vars:
    expected_location: "role: foo"
  roles:
  - foo
  - bar

  tasks:
  - name: Use ping from role
    ping:
    register: result

  - assert:
      that:
        - '"location" in result'
        - 'result["location"] == "{{ expected_location}}"'