code: def test_async_connection_error_message(self):
      try:
          cnn = psycopg2.connect(
              "dbname=thisdatabasedoesntexist", async_=True
          )
          self.wait(cnn)
      except psycopg2.Error as e:
          self.assertNotEqual(
              str(e),
              "asynchronous connection failed",
              "connection error reason lost",
          )
      else:
          self.fail("no exception raised")
  
imports: import gc
  import time
  import unittest
  import warnings
  import psycopg2
  import psycopg2.errors
  from psycopg2 import extensions
  from .testutils import ConnectingTestCase, StringIO, skip_before_postgres, skip_if_crdb, crdb_version, slow
label_desc: Use image node_id 29 for calling the AsyncTests obj's underlying member method code with example usage: obj.test_async_connection_error_message() without return types