too lazy to think of a message, so enjoy this pointless text. Good luck future me...

clanServices/k3s/tests/vm/default.nix

@@ -26,6 +26,18 @@
         };
       };
     };
+
+    machines = {
+      node1 = {
+        networking.domain = "test.local";
+      };
+      node2 = {
+        networking.domain = "test.local";
+      };
+      node3 = {
+        networking.domain = "test.local";
+      };
+    };
   };
 
   nodes = {
@@ -37,4 +49,4 @@
   testScript = ''
     start_all()
   '';
-}
+}