code: def test_at_setitem_expansion_series_dt64tz_value(
      self, tz_naive_fixture
  ):
      # GH#25506
      ts = Timestamp("2017-08-05 00:00:00+0100", tz=tz_naive_fixture)
      result = Series(ts)
      result.at[1] = ts
      expected = Series([ts, ts])
      tm.assert_series_equal(result, expected)
  
imports: from datetime import datetime, timezone
  import numpy
  import pytest
  from pandas.errors import InvalidIndexError
  from pandas import CategoricalDtype, CategoricalIndex, DataFrame, DatetimeIndex, Index, MultiIndex, Series, Timestamp
  import pandas._testing
label_desc: Use image node_id 1 for calling the TestAtSetItemWithExpansion obj's underlying member method code with example usage: obj.test_at_setitem_expansion_series_dt64tz_value(tz_naive_fixture) without return types