Run Django's SimpleTestCase assertion in single Python script (without Django project)

t.py

import unittest
from django.test import SimpleTestCase
from django.conf import settings

settings.configure()

class InHTMLTestCase(SimpleTestCase):
    databases = []

    def test_ok(self):
        self.assertInHTML('a', '<div>a</div>')
    
    def test_not_ok(self):
        self.assertInHTML('a', '<div>a<br>b</div>')

    def test_ok2(self):
        self.assertInHTML('a<br>b', '<div>a<br>b</div>')

if __name__ == '__main__':
    unittest.main()

~/workspaces/python
❯ python -V
Python 3.6.10

~/workspaces/python
❯ python -m django --version
2.2.13

~/workspaces/python
❯ python t.py -v
test_not_ok (__main__.InHTMLTestCase) ... FAIL
test_ok (__main__.InHTMLTestCase) ... ok
test_ok2 (__main__.InHTMLTestCase) ... ok

======================================================================
FAIL: test_not_ok (__main__.InHTMLTestCase)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "t.py", line 14, in test_not_ok
    self.assertInHTML('a', '<div>a<br>b</div>')
  File "/Users/kensuke.nagae/.anyenv/envs/pyenv/versions/3.6.10/lib/python3.6/site-packages/django/test/testcases.py", line 800, in assertInHTML
    self.assertTrue(real_count != 0, msg_prefix + "Couldn't find '%s' in response" % needle)
AssertionError: False is not true : Couldn't find 'a' in response

----------------------------------------------------------------------
Ran 3 tests in 0.053s

FAILED (failures=1)