hi,team:

    my dag is 1 minute schedule,one parts dag state is success,but tasks state is not yet started in a dag:

![image](https://user-images.githubusercontent.com/41068725/116344664-357d8780-a819-11eb-8010-c746ffdfdbcc.png)


   how can to fix it?
tests/core/test_sqlalchemy_config.py
#
#
#
import unittest
from unittest.mock import patch
import pytest
from sqlalchemy.pool import NullPool
from airflow import settings
from airflow.exceptions import AirflowConfigException
from tests.test_utils.config import conf_vars
SQL_ALCHEMY_CONNECT_ARGS = {'test': 43503, 'dict': {'is': 1, 'supported': 'too'}}
class TestSqlAlchemySettings(unittest.TestCase):
    def setUp(self):