diff --git a/deployment/data-model-test.nix b/deployment/data-model-test.nix
index 2a4e92ba..880ad344 100644
--- a/deployment/data-model-test.nix
+++ b/deployment/data-model-test.nix
@@ -138,6 +138,11 @@ in
                       providers = {
                         inherit (inputs.nixops4.modules.nixops4Provider) local;
                       };
+                      # this seems checked according to {providers,resources,resource}.nix,
+                      # values will not eagerly get checked, matching `providers.nix`'s `lazyAttrsOf`,
+                      # whereas allowed keys seem to match those defined in `resource.nix`.
+                      # the content of `resources.the-machine` however, follows `nixops4-nixos`,
+                      # which is not allowed through our `type` yet.
                       resources.the-machine = {
                         _class = "nixops4Resource";
                         type = providers.local.exec;