diff --git a/roles/mariadb/tasks/main.yml b/roles/mariadb/tasks/main.yml
index 8e87678..a8633c9 100644
--- a/roles/mariadb/tasks/main.yml
+++ b/roles/mariadb/tasks/main.yml
@@ -72,9 +72,8 @@
     - "::1"
 
 - name: scripted version of mysql_secure_installation
-  command: "{{ item }}"
+  shell: "{{ item }}"
   args:
-    warn: false
     creates: ~/mysql_secure_installation
   loop:
     - "mysql -e \"DELETE FROM mysql.user WHERE User='';\""
diff --git a/roles/munin-client/tasks/hypervisors.yml b/roles/munin-client/tasks/hypervisors.yml
index edb9577..46f7231 100644
--- a/roles/munin-client/tasks/hypervisors.yml
+++ b/roles/munin-client/tasks/hypervisors.yml
@@ -1,15 +1,11 @@
 ---
 
 - name: delete squid plugins
-  shell:
-    cmd: "rm -f /etc/munin/plugins/squid_*"
-    warn: false
+  shell: "rm -f /etc/munin/plugins/squid_*"
   notify:
     - restart munin-node
 
 - name: delete lxc interfaces plugins
-  shell:
-    cmd: "rm -f /etc/munin/plugins/if_*veth* /etc/munin/plugins/if_*fw* /etc/munin/plugins/if_*vmbr*"
-    warn: false
+  shell: "rm -f /etc/munin/plugins/if_*veth* /etc/munin/plugins/if_*fw* /etc/munin/plugins/if_*vmbr*"
   notify:
     - restart munin-node