code: def test_one_arg_iso_str(self):
      dt = datetime.utcnow()
  
      assert_datetime_equality(
          self.factory.get(dt.isoformat()),
          dt.replace(tzinfo=tz.tzutc()),
      )
  
imports: import time
  from datetime import date, datetime
  from decimal import Decimal
  import pytest
  from dateutil import tz
  from arrow import Arrow
  from arrow.parser import ParserError
  from .utils import assert_datetime_equality
label_desc: Use image node_id 20 for calling the TestGet obj's underlying member method code with example usage: obj.test_one_arg_iso_str() without return types