human
Solve the following python programming problem given the following code:
@ mock.patch.object (notifier.LOG, 'warn') 
def test_update_progress_handler_failure(self, mocked_warn) : 
    def progress_callback(* args, **kwargs) : 
        raise Exception ('Woot!') 
a_task = ProgressTask () 
    a_task.notifier.register (task.EVENT_UPDATE_PROGRESS, progress_callback) 
    a_task.execute ([0.5]) 
    self.assertEqual (1, self.call_count) 

    
    

    Fix the buggy line: self.assertEqual (1, self.call_count)
assistant
#Here is Python code to fix the buggy line: self.

self.assertEqual (1, mocked_warn.call_count)