Content-Type header is "text/html", not "application/json"

报错
DRF运行报错 ValueError: Content-Type header is "text/html", not "application/json"

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Traceback (most recent call last):
  File "C:\Users\17293\Desktop\Coder\Python\Django\twitter\newsfeeds\api\tests.py", line 41, in test_list
    print(response.json())
  File "C:\Users\17293\AppData\Local\Programs\Python\Python39\lib\site-packages\django\test\client.py", line 662, in _parse_json
    raise ValueError(
ValueError: Content-Type header is "text/html", not "application/json"

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Ran 1 test in 0.362s

FAILED (errors=1)
Destroying test database for alias 'default'...

报错原因和解决办法：
去 urls.py 文件中添加路由配置