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tests/test_compat.py

@@ -120,9 +120,10 @@ def test_serialize_sequence_value_with_optional_list_pipe_union():
 
 def test_serialize_sequence_value_with_none_first_in_union():
     """Test that serialize_sequence_value handles Union[None, List[...]] correctly."""
-    from fastapi._compat import v2
     from typing import Union
 
+    from fastapi._compat import v2
+
     # Use Union[None, list[str]] to ensure None comes first in the union args
     field_info = FieldInfo(annotation=Union[None, list[str]])
     field = v2.ModelField(name="items", field_info=field_info)