diff --git a/roles/mail_forwarder/molecule/default/prepare.yml b/roles/mail_forwarder/molecule/default/prepare.yml
index 45e4b7010f48a0e852c2d646b6300c598c100169..59708adff7853b2eb5ee5859b81839d36d2f00cc 100644
--- a/roles/mail_forwarder/molecule/default/prepare.yml
+++ b/roles/mail_forwarder/molecule/default/prepare.yml
@@ -66,9 +66,6 @@
       with_dict:
         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"
         192.168.56.31: "parameters-mandatory-bullseye"
         192.168.56.32: "parameters-optional-bullseye"
         192.168.56.33: "parameters-no-incoming-bullseye"