diff --git a/defaults/main.yml b/defaults/main.yml
index ee0a406..bfb666f 100644
--- a/defaults/main.yml
+++ b/defaults/main.yml
@@ -19,13 +19,6 @@ apt_repositories: []
 #     key_url: https://pkgs.zabbly.com/key.asc
 #     key_path: /etc/apt/keyrings/incus.asc
 
-apt_preferences: []
-# Exemple:
-#   - filename: sid
-#     package: "*"
-#     pin: release n=sid
-#     priority: 100
-
 apt_remove: []
 apt_install: []
 
diff --git a/tasks/repositories.yml b/tasks/repositories.yml
index 145cc1e..8363b63 100644
--- a/tasks/repositories.yml
+++ b/tasks/repositories.yml
@@ -32,13 +32,9 @@
 - name: Ajouter le fichier de priorité
   ansible.builtin.template:
     src: preferences.j2
-    dest: /etc/apt/preferences.d/{{ item.priority }}-{{ item.name }}
+    dest: /etc/apt/preferences.d/40-debian
     owner: root
     group: root
     mode: u=rw,g=r,o=r
-  when: apt_preferences | length > 0
   become: true
-  loop: "{{ apt_preferences }}"
-  loop_control:
-    label: "{{ item.name }}"
   notify: Mettre à jour le cache
diff --git a/templates/apt.conf.j2 b/templates/apt.conf.j2
index e657c4b..203286f 100644
--- a/templates/apt.conf.j2
+++ b/templates/apt.conf.j2
@@ -1,6 +1,5 @@
 # {{ ansible_managed }}
 
-APT::Default-Release "stable";
 APT::Install-Recommends "false";
 APT::Install-Suggests "false";
 APT::Get::Show-Versions "true";
diff --git a/templates/preferences.j2 b/templates/preferences.j2
index 2d29ad2..8f7882a 100644
--- a/templates/preferences.j2
+++ b/templates/preferences.j2
@@ -1,5 +1,9 @@
 # {{ ansible_managed }}
 
-Package: {{ item.package }}
-Pin: {{ item.pin }}
-Pin-Priority: {{ item.priority }}
+Package: *
+Pin: release a=testing
+Pin-Priority: -10
+
+Package: *
+Pin: release a=unstable
+Pin-Priority: -20