diff --git a/roles/xmpp_server/molecule/default/prepare.yml b/roles/xmpp_server/molecule/default/prepare.yml
index 231d1f6b7d3474345e4fb79ae525ddb4d7e3a0e0..7a5635297d07c6a01f794147ee87733440919d71 100644
--- a/roles/xmpp_server/molecule/default/prepare.yml
+++ b/roles/xmpp_server/molecule/default/prepare.yml
@@ -98,7 +98,8 @@
         192.168.56.32: "parameters-optional domain2 proxy.domain2 conference.domain2 upload.domain2 domain3 proxy.domain3 conference.domain3 upload.domain3"
         fd00::192:168:56:21: "client-bookworm"
         fd00::192:168:56:31: "parameters-mandatory domain1 proxy.domain1 conference.domain1 upload.domain1"
-        fd00::192:168:56:32: "parameters-optional domain2 proxy.domain2 conference.domain2 upload.domain2 domain3 proxy.domain3 conference.domain3 upload.domain3"
+        fd00::192:168:56:32: >-
+          parameters-optional domain2 proxy.domain2 conference.domain2 upload.domain2 domain3 proxy.domain3 conference.domain3 upload.domain3
 
 - name: Prepare, helpers
   hosts: clients