diff --git a/roles/mail_server/molecule/default/group_vars/parameters-optional.yml b/roles/mail_server/molecule/default/group_vars/parameters-optional.yml
index e1ea8b98ff96d88a31b99632c25b1119308403a3..5adfec2ca8fe74686c034776f6b638495a7d8551 100644
--- a/roles/mail_server/molecule/default/group_vars/parameters-optional.yml
+++ b/roles/mail_server/molecule/default/group_vars/parameters-optional.yml
@@ -40,7 +40,6 @@ backup_client_username: "bak-parameters-optional-{{ ansible_distribution_release
 backup_encryption_key: "{{ lookup('file', 'tests/data/gnupg/parameters-optional.asc') }}"
 backup_server: ldap-server
 backup_server_host_ssh_public_keys:
-  - "{{ lookup('file', 'tests/data/ssh/server_dsa.pub') }}"
   - "{{ lookup('file', 'tests/data/ssh/server_rsa.pub') }}"
   - "{{ lookup('file', 'tests/data/ssh/server_ed25519.pub') }}"
   - "{{ lookup('file', 'tests/data/ssh/server_ecdsa.pub') }}"