human
Solve the following python programming problem given the following code:
@ run_with_all_backends 
def test_repeater_failed_sends(self) : 
    '
        This tests records that fail to send three times
        ' 
    def now() : 
        return datetime.utcnow () 
repeat_records = RepeatRecord.all (domain = self.domain, due_before = now ()) 
    self.assertEqual (len (next_check_time), 2) 
    for repeat_record in repeat_records : 
        with patch ('corehq.apps.repeaters.models.simple_post_with_cached_timeout', return_value = MockResponse (status_code = 404, reason = 'Not Found')) as mock_post : 
            repeat_record.fire () 
            self.assertEqual (mock_post.call_count, 3) 
repeat_record.save () 
next_check_time = (now () + timedelta (minutes = 60)) 
    repeat_records = RepeatRecord.all (domain = self.domain, due_before = (now () + timedelta (minutes = 15))) 
    self.assertEqual (len (repeat_records), 0) 
    repeat_records = RepeatRecord.all (domain = self.domain, due_before = next_check_time) 
    self.assertEqual (len (repeat_records), 2) 

    
    

    Fix the buggy line: self.assertEqual (len (next_check_time), 2)
assistant
#Here is Python code to fix the buggy line: self.

self.assertEqual (len (repeat_records), 2)