- Validate config as a task (Ansible's validate requires specifying the config file).

tasks/main.yml

@@ -67,10 +67,13 @@
       owner: root
       group: root
       mode: 0o0644
-      validate: mysqld --help --verbose
   notify:
       - Restart MySQL
 
+- name: Validate config
+  command: mysqld --help --verbose
+  changed_when: False
+
 - name: Enable service
   service:
       name: mysql