Fix more tests

src/snowflake/connector/cursor.py

@@ -489,6 +489,9 @@ def __del__(self) -> None:  # pragma: no cover
 
     @property
     def description(self) -> list[ResultMetadata]:
+        if self._description is None:
+            return None
+
         return [meta._to_result_metadata_v1() for meta in self._description]
 
     @property
@@ -1152,6 +1155,8 @@ def describe(
         kwargs["_describe_only"] = kwargs["_is_internal"] = True
         self.execute(*args, **kwargs)
 
+        if self._description is None:
+            return None
         return [meta._to_result_metadata_v1() for meta in self._description]
 
     def _describe_internal(

src/snowflake/connector/result_batch.py

@@ -250,7 +250,9 @@ def __init__(
         self._chunk_headers = chunk_headers
         self._remote_chunk_info = remote_chunk_info
         self._schema = schema
-        self.schema = [s._to_result_metadata_v1() for s in schema]
+        self.schema = (
+            [s._to_result_metadata_v1() for s in schema] if schema is not None else None
+        )
         self._use_dict_result = use_dict_result
         self._metrics: dict[str, int] = {}
         self._data: str | list[tuple[Any, ...]] | None = None