diff --git a/roles/backup/molecule/default/molecule.yml b/roles/backup/molecule/default/molecule.yml
index de572da3a6edecec9fc72b9a36b561d7a0d248bf..75d702b08d73a3d1f03582d051ec7504f812b779 100644
--- a/roles/backup/molecule/default/molecule.yml
+++ b/roles/backup/molecule/default/molecule.yml
@@ -14,10 +14,10 @@ lint:
 
 platforms:
 
-  - name: parameters-mandatory-buster
+  - name: parameters-mandatory-bullseye
     groups:
       - parameters-mandatory
-    box: debian/contrib-buster64
+    box: debian/bullseye64
     memory: 256
     cpus: 1
     # @WORKAROUND: Boot-time hanging due to clock source
@@ -29,24 +29,6 @@ platforms:
     provider_raw_config_args:
       - "customize ['modifyvm', :id, '--paravirtprovider', 'minimal']"
 
-  - name: parameters-optional-buster
-    groups:
-      - parameters-optional
-    box: debian/contrib-buster64
-    memory: 256
-    cpus: 1
-    provider_raw_config_args:
-      - "customize ['modifyvm', :id, '--paravirtprovider', 'minimal']"
-
-  - name: parameters-mandatory-bullseye
-    groups:
-      - parameters-mandatory
-    box: debian/bullseye64
-    memory: 256
-    cpus: 1
-    provider_raw_config_args:
-      - "customize ['modifyvm', :id, '--paravirtprovider', 'minimal']"
-
   - name: parameters-optional-bullseye
     groups:
       - parameters-optional