diff --git a/aidial_client/types/metadata.py b/aidial_client/types/metadata.py
index 7662c20..874c529 100644
--- a/aidial_client/types/metadata.py
+++ b/aidial_client/types/metadata.py
@@ -17,7 +17,7 @@ class Config:
             alias_generator = to_camel
             allow_population_by_field_name = True
 
-    name: str
+    name: Optional[str] = None
     parent_path: Optional[str] = None
     bucket: str
     url: str
diff --git a/tests/test_response_processing.py b/tests/test_response_processing.py
new file mode 100644
index 0000000..c5ca642
--- /dev/null
+++ b/tests/test_response_processing.py
@@ -0,0 +1,30 @@
+from aidial_client.types.metadata import FileMetadata
+
+BUCKET = "684f6Lz7ubje66aoCRsa5c"
+
+PAYLOAD = {
+    "bucket": BUCKET,
+    "name": None,
+    "nodeType": "FOLDER",
+    "parentPath": None,
+    "resourceType": "FILE",
+    "url": f"files/{BUCKET}/",
+    "items": [
+        {
+            "bucket": BUCKET,
+            "name": "appdata",
+            "nodeType": "FOLDER",
+            "parentPath": None,
+            "resourceType": "FILE",
+            "url": f"files/{BUCKET}/appdata/",
+        }
+    ],
+}
+
+
+def test_name_is_none_round_trip():
+    """Root folder returned by the API has name=None; parse→serialize must reproduce the original payload."""
+    assert PAYLOAD["name"] is None
+    result = FileMetadata(**PAYLOAD)
+    assert result.name is None
+    assert result.model_dump(by_alias=True, exclude_unset=True) == PAYLOAD