diff --git a/server-rs/crates/shared-contracts/src/game_creation_app.rs b/server-rs/crates/shared-contracts/src/game_creation_app.rs
index 39e622dc1..b47581893 100644
--- a/server-rs/crates/shared-contracts/src/game_creation_app.rs
+++ b/server-rs/crates/shared-contracts/src/game_creation_app.rs
@@ -2173,6 +2173,14 @@ mod tests {
         serde_json::from_value(value).expect("asset entry should deserialize")
     }
 
+    #[test]
+    fn manifest_unknown_kind_is_preserved_as_unknown_without_alias_migration() {
+        let entry = asset_entry_from_json(asset_entry_json("ui"));
+        assert_eq!(entry.kind, GameCreationAppAssetKind::Unknown);
+        let serialized = serde_json::to_value(entry).expect("unknown asset entry serializes");
+        assert_eq!(serialized["kind"], "unknown");
+    }
+
     #[test]
     fn asset_category_mapping_covers_every_canonical_kind() {
         assert_eq!(