diff --git a/site.yml b/site.yml
index 819a8aa..b1d687e 100644
--- a/site.yml
+++ b/site.yml
@@ -3,24 +3,33 @@
   user: root
   become: False
   roles:
-    - common
-    - backup
+  - common
+  - backup
 
 - hosts: backupclient
   user: root
   become: False
   roles:
-    - common
-    - backupclient
+  - common
+  - backupclient
 
 - hosts: ruby
   become: true
   roles:
-    - common
-    - rvm1-ansible
+  - common
+  - rvm1-ansible
 
 - hosts: test_common
   sudo: True
+
+- hosts: all
+  gather_facts: False
+  tasks:
+  - name: install python3
+    raw: test -e /usr/bin/python3 || (apt-get update && apt-get install -y python3)
+
+- hosts: ariane
   roles:
     - common
-
+#    - rvm1-ansible
+    - ariane