code: def test_tz_convert_utc_with_system_utc(self):
      # from system utc to real utc
      ts = Timestamp(
          "2001-01-05 11:56", tz=timezones.maybe_get_tz("dateutil/UTC")
      )
      # check that the time hasn't changed.
      assert ts == ts.tz_convert(dateutil.tz.tzutc())
  
      # from system utc to real utc
      ts = Timestamp(
          "2001-01-05 11:56", tz=timezones.maybe_get_tz("dateutil/UTC")
      )
      # check that the time hasn't changed.
      assert ts == ts.tz_convert(dateutil.tz.tzutc())
  
file_path: pandas/pandas/tests/scalar/timestamp/methods/test_tz_convert.py
imports: import dateutil
  import pytest
  from pandas._libs.tslibs import timezones
  import pandas.util._test_decorators
  from pandas import Timestamp
label_desc: Use image node_id 3 for calling the TestTimestampTZConvert obj's underlying member method code with example usage: obj.test_tz_convert_utc_with_system_utc() without return types