ansible/test/integration/targets/blocks/block_rescue_vars.yml

- hosts: localhost
  gather_facts: no
  tasks:
    - block:
        - name: EXPECTED FAILURE
          fail:
      rescue:
        - name: Assert that ansible_failed_task is defined
          assert:
            that:
              - ansible_failed_task is defined

        - name: Assert that ansible_failed_result is defined
          assert:
            that:
              - ansible_failed_result is defined