diff --git a/roles/mail_forwarder/molecule/default/molecule.yml b/roles/mail_forwarder/molecule/default/molecule.yml
index 04b21eb3ae05ef0e77e5b26660d13318a9e8ce79..67db5205e686a348d31f66d2672b439e5f0e19b2 100644
--- a/roles/mail_forwarder/molecule/default/molecule.yml
+++ b/roles/mail_forwarder/molecule/default/molecule.yml
@@ -17,6 +17,7 @@ platforms:
   - name: mail-server
     groups:
       - mail-servers
+      - helper
     box: debian/contrib-stretch64
     memory: 256
     cpus: 1
@@ -29,6 +30,7 @@ platforms:
   - name: client1
     groups:
       - clients
+      - helper
     box: debian/contrib-stretch64
     memory: 256
     cpus: 1