Running multiple tasks in an Ansible handler

restart_test.yml

- block:
  - name: message 1
    debug: msg=operation1
  - name: message 2
    debug: msg=operation2
- name: message 3
  debug: msg=operation3

test.yml

# Stolen from https://medium.com/opsops/using-block-for-handlers-in-ansible-a55f45b62a96

################################################################################
# I wanted to change an Ansible handler task to run a couple of steps. The     #
# first is conditional but the second is not. I thought I could do this with a #
# block but I guess that's not supported but I found the above article that    #
# presented a way to do it in a different way.                                 #
################################################################################

- name: Try technique to run multiple tasks in a handler
  hosts: localhost
  gather_facts: no
  tasks:
    - command: id
      notify: restart test
    - command: id
      notify: restart test
    - command: id
      notify: restart test
    - command: id
      notify: restart test
  handlers:
    - name: restart test
      import_tasks: restart_test.yml    # this causes "ERROR! The requested handler 'restart test' was not found in either the main handlers list nor in the listening handlers list"
      # include_tasks: restart_test.yml # this works

Thank you!