diff --git a/checks/dummy-inventory-test/default.nix b/checks/dummy-inventory-test/default.nix
index 582a0e1af..7691c80c4 100644
--- a/checks/dummy-inventory-test/default.nix
+++ b/checks/dummy-inventory-test/default.nix
@@ -1,6 +1,10 @@
 (import ../lib/test-inventory.nix) (
   { ... }:
   {
+    # This tests the compatibility of the inventory
+    # With the test framework
+    # - legacy-modules
+    # - clan.service modules
     name = "dummy-inventory-test";
 
     inventory.directory = ./.;
@@ -8,22 +12,52 @@
       machines.peer1 = { };
       machines.admin1 = { };
       services = {
-        dummy-module.default = {
+        legacy-module.default = {
           roles.peer.machines = [ "peer1" ];
           roles.admin.machines = [ "admin1" ];
         };
       };
+      instances."test" = {
+        module.name  = "new-service";
+        roles.peer.machines.peer1 = { };
+      };
+
       modules = {
-        dummy-module = ./dummy-module;
+        legacy-module = ./legacy-module;
+        new-service = {
+          _class = "clan.service";
+          manifest.name = "new-service";
+          roles.peer = {};
+          perMachine = {
+            nixosModule = {
+              # This should be generated by:
+              # ./pkgs/scripts/update-vars.py inventory-test-framework-compatibility-test
+              clan.core.vars.generators.new-service = {
+                files.hello = {
+                  secret = false;
+                  deploy = true;
+                };
+                script = ''
+                  # This is a dummy script that does nothing
+                  echo "This is a dummy script" > $out/hello
+                '';
+              };
+            };
+          };
+        };
       };
     };
 
-    testScript = ''
+    testScript = { nodes, ...}: ''
       start_all()
       admin1.wait_for_unit("multi-user.target")
       peer1.wait_for_unit("multi-user.target")
+      # Provided by the legacy module
       print(admin1.succeed("systemctl status dummy-service"))
       print(peer1.succeed("systemctl status dummy-service"))
+
+      # peer1 should have the 'hello' file
+      peer1.succeed("cat ${nodes.peer1.clan.core.vars.generators.new-service.files.hello.path}")
     '';
   }
 )
diff --git a/checks/dummy-inventory-test/dummy-module/README.md b/checks/dummy-inventory-test/legacy-module/README.md
similarity index 100%
rename from checks/dummy-inventory-test/dummy-module/README.md
rename to checks/dummy-inventory-test/legacy-module/README.md
diff --git a/checks/dummy-inventory-test/dummy-module/roles/admin.nix b/checks/dummy-inventory-test/legacy-module/roles/admin.nix
similarity index 100%
rename from checks/dummy-inventory-test/dummy-module/roles/admin.nix
rename to checks/dummy-inventory-test/legacy-module/roles/admin.nix
diff --git a/checks/dummy-inventory-test/dummy-module/roles/peer.nix b/checks/dummy-inventory-test/legacy-module/roles/peer.nix
similarity index 100%
rename from checks/dummy-inventory-test/dummy-module/roles/peer.nix
rename to checks/dummy-inventory-test/legacy-module/roles/peer.nix
diff --git a/checks/dummy-inventory-test/dummy-module/shared.nix b/checks/dummy-inventory-test/legacy-module/shared.nix
similarity index 100%
rename from checks/dummy-inventory-test/dummy-module/shared.nix
rename to checks/dummy-inventory-test/legacy-module/shared.nix