Fix error

Author: esrakartalOpt

tests/test_config_manager.py

@@ -515,14 +515,11 @@ def test_fetch_datafile__exception_polling_thread_failed(self, _):
 
             # verify the error log message
             log_messages = [args[0] for args, _ in mock_logger.error.call_args_list]
-            found_message = False
             for message in log_messages:
                 print(message)
                 if "Thread for background datafile polling failed. " \
                    "Error: timestamp too large to convert to C PyTime_t" not in message:
-                    found_message = True
-                    break
-            assert found_message
+                    assert False
 
     def test_is_running(self, _):
         """ Test that polling thread is running after instance of PollingConfigManager is created. """