diff --git a/extras/haproxy_cloudkitty.yml b/extras/haproxy_cloudkitty.yml
index 2f2ddd0..e6db0d2 100644
--- a/extras/haproxy_cloudkitty.yml
+++ b/extras/haproxy_cloudkitty.yml
@@ -1,3 +1,4 @@
+---
 haproxy_service_configs:
   - service:
       haproxy_service_name: cloudkitty_api
diff --git a/extras/horizon/horizon_post_install.yml b/extras/horizon/horizon_post_install.yml
index 711db89..ada4dc7 100644
--- a/extras/horizon/horizon_post_install.yml
+++ b/extras/horizon/horizon_post_install.yml
@@ -1,3 +1,4 @@
+---
 - name: Enable the cloudkitty-dashboard Horizon panel
   file:
     src: "{{ item.src }}"
diff --git a/extras/horizon/horizon_vars.yml b/extras/horizon/horizon_vars.yml
index ce6782b..6e23bcb 100644
--- a/extras/horizon/horizon_vars.yml
+++ b/extras/horizon/horizon_vars.yml
@@ -1,3 +1,4 @@
+---
 ## CloudKitty
 horizon_enable_cloudkitty: False
 
diff --git a/extras/user_secrets_cloudkitty.yml b/extras/user_secrets_cloudkitty.yml
index 5f131bf..ff78525 100644
--- a/extras/user_secrets_cloudkitty.yml
+++ b/extras/user_secrets_cloudkitty.yml
@@ -1,3 +1,4 @@
+---
 ## Cloudkitty passwords
 cloudkitty_service_password:
 cloudkitty_container_mysql_password:
diff --git a/tests/ansible-role-requirements.yml b/tests/ansible-role-requirements.yml
index ff94200..90dffb0 100644
--- a/tests/ansible-role-requirements.yml
+++ b/tests/ansible-role-requirements.yml
@@ -1,3 +1,4 @@
+---
 - name: apt_package_pinning
   src: https://git.openstack.org/openstack/openstack-ansible-apt_package_pinning
   scm: git