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

tasks/main.yml

@@ -54,7 +54,6 @@
       owner: root
       group: 0
       mode: 0o0644
-      validate: unbound-checkconf
   notify:
       - Restart Unbound
 
@@ -76,6 +75,10 @@
   notify:
       - Update SMTPd database
 
+- name: Validate config
+  command: unbound-checkconf
+  changed_when: False
+
 - name: Enable service
   service:
       name: unbound