Use include_tasks for os_hardening/main.yml

roles/os_hardening/tasks/hardening.yml

@@ -14,7 +14,7 @@
 
 # we only override variables with our default, if they have not been specified already
 # by default the lookup functions finds all varnames containing the string, therefore
-# we add ^ and $ to denote start and end of string, so this returns only exact maches
+# we add ^ and $ to denote start and end of string, so this returns only exact matches
 - name: Set OS dependent variables, if not already defined by user
   set_fact:
     '{{ item.key }}': '{{ item.value }}'

roles/os_hardening/tasks/main.yml

@@ -1,3 +1,3 @@
 ---
-- import_tasks: hardening.yml
+- include_tasks: hardening.yml
   when: os_hardening_enabled | bool