diff --git a/roles/mail_forwarder/molecule/default/prepare.yml b/roles/mail_forwarder/molecule/default/prepare.yml
index dc46f86be576f9244deaa9ddc4c74ce9f5c98921..4ec921e92400f6b847f8b689bc5f48817d7f9cee 100644
--- a/roles/mail_forwarder/molecule/default/prepare.yml
+++ b/roles/mail_forwarder/molecule/default/prepare.yml
@@ -64,11 +64,11 @@
         mode: 0644
         state: present
       with_dict:
-        192.168.56.10: "mail-server domain1"
-        192.168.56.11: "client1"
-        192.168.56.20: "parameters-mandatory-buster64"
-        192.168.56.21: "parameters-optional-buster64"
-        192.168.56.22: "parameters-no-incoming-buster64"
+        192.168.56.11: "mail-server domain1"
+        192.168.56.12: "client1"
+        192.168.56.21: "parameters-mandatory-buster"
+        192.168.56.22: "parameters-optional-buster"
+        192.168.56.23: "parameters-no-incoming-buster"
 
     - name: Install tools for testing
       apt: