diff --git a/roles/backup_client/molecule/default/molecule.yml b/roles/backup_client/molecule/default/molecule.yml
index f8b634c7e83ae702c1aa5c4568dcec01ca948d72..111e8a9b533b85acca56f3dcc47517e80a8c18e4 100644
--- a/roles/backup_client/molecule/default/molecule.yml
+++ b/roles/backup_client/molecule/default/molecule.yml
@@ -18,7 +18,7 @@ lint:
 # stupid legacy design decisions!
 platforms:
   - name: backup-server
-    box: debian/contrib-buster64
+    box: debian/bullseye64
     memory: 512
     cpus: 1
     interfaces:
@@ -51,6 +51,30 @@ platforms:
         network_name: private_network
         type: static
 
+  - name: param-mandatory-bullseye
+    groups:
+      - parameters-mandatory
+    box: debian/bullseye64
+    memory: 256
+    cpus: 1
+    interfaces:
+      - auto_config: true
+        ip: 192.168.56.30
+        network_name: private_network
+        type: static
+
+  - name: param-optional-bullseye
+    groups:
+      - parameters-optional
+    box: debian/bullseye64
+    memory: 256
+    cpus: 1
+    interfaces:
+      - auto_config: true
+        ip: 192.168.56.31
+        network_name: private_network
+        type: static
+
 provisioner:
   name: ansible
   config_options: