diff --git a/Metadata/groups.xml b/Metadata/groups.xml
index 0dd9bd2..abc6d1e 100644
--- a/Metadata/groups.xml
+++ b/Metadata/groups.xml
@@ -139,6 +139,7 @@
   <Group name="o2"
          profile="true">
     <Group name="crans"/>
+    <Group name="debian-testing"/>
   </Group>
 
   <!-- profile de test -->
diff --git a/Python/etc/apt/sources.list b/Python/etc/apt/sources.list
index 560cb13..8b60dbd 100644
--- a/Python/etc/apt/sources.list
+++ b/Python/etc/apt/sources.list
@@ -15,6 +15,12 @@ if has("ovh"):
     @# Paquet construit a la main
     source("ftp://mirror.adm.crans.org/custom ./")
 
+elif has("debian-testing"):
+    prefix = ""
+    source("http://debian.ens-cachan.fr/debian/ lenny main contrib")
+    source("http://security.debian.org/ lenny/updates main")
+    source("ftp://mirror.adm.crans.org/custom/ ./")
+
 else:
     if has("debian-mirror"):
         prefix = "file:/mirror/"