diff --git a/deployment/data-model-test.nix b/deployment/data-model-test.nix
index 53be4912..a2e0010d 100644
--- a/deployment/data-model-test.nix
+++ b/deployment/data-model-test.nix
@@ -179,12 +179,14 @@ in
         inherit (fediversity)
           example-configuration
           ;
+        num-packages = lib.lists.length fediversity.example-deployment.users.users.operator.packages;
       };
     expected = {
       example-configuration = {
         enable = true;
         applications.hello.enable = true;
       };
+      num-packages = 1;
     };
   };
 }