in this pr changed ?

Author: jx2lee

tests/test_serializers.py

@@ -16,7 +16,6 @@
 # under the License.
 
 import json
-import os
 import uuid
 from typing import Any
 
@@ -28,6 +27,7 @@
 from pyiceberg.table.metadata import TableMetadataV1
 from pyiceberg.table.update import AssertRefSnapshotId, TableRequirement
 from pyiceberg.typedef import IcebergBaseModel
+from pyiceberg.utils.config import Config
 
 
 def test_legacy_current_snapshot_id(
@@ -41,7 +41,14 @@ def test_legacy_current_snapshot_id(
     static_table = StaticTable.from_metadata(metadata_location)
     assert static_table.metadata.current_snapshot_id is None
 
-    mocker.patch.dict(os.environ, values={"PYICEBERG_LEGACY_CURRENT_SNAPSHOT_ID": "True"})
+    mocker.patch(
+        "pyiceberg.serializers.Config",
+        return_value=Config({"legacy-current-snapshot-id": "True"}),
+    )
+    mocker.patch(
+        "pyiceberg.table.metadata.Config",
+        return_value=Config({"legacy-current-snapshot-id": "True"}),
+    )
 
     ToOutputFile.table_metadata(metadata, PyArrowFileIO().new_output(location=metadata_location), overwrite=True)
     with PyArrowFileIO().new_input(location=metadata_location).open() as input_stream: