diff --git a/roles/mail_forwarder/molecule.yml b/roles/mail_forwarder/molecule.yml
index f95379690441e0f942ce69a4fea940e459a69959..0acdf4c75f37a643af6133687caff1c371d59bbc 100644
--- a/roles/mail_forwarder/molecule.yml
+++ b/roles/mail_forwarder/molecule.yml
@@ -49,5 +49,12 @@ vagrant:
           ip: 10.31.127.31
           auto_config: yes
 
+    - name: parameters-no-incoming
+      interfaces:
+        - network_name: private_network
+          type: static
+          ip: 10.31.127.32
+          auto_config: yes
+
 verifier:
   name: testinfra