diff --git a/tests/inventories/single-machine.yml b/tests/inventories/single-machine.yml
index 453ae6267..f29122795 100644
--- a/tests/inventories/single-machine.yml
+++ b/tests/inventories/single-machine.yml
@@ -6,3 +6,6 @@ localhost
 
 [rgws]
 localhost
+
+[mdss]
+localhost