Flask Testing Hangs on self.client.post

[0mars]

time STAGE=test APP_SETTINGS="authentek.server.config.TestingConfig" pytest authentek/tests/test_auth.py -k 'test_registration'
=============================================================================================== test session starts ===============================================================================================
platform linux -- Python 3.7.7, pytest-6.1.2, py-1.9.0, pluggy-0.13.1
rootdir: /usr/src/app, configfile: setup.cfg
plugins: factoryboy-2.0.3, Faker-4.17.1
collected 9 items / 8 deselected / 1 selected 

authentek/tests/test_auth.py

    def register_user(self, username, email, password):
        return self.client.post(
            '/v1/users/',
            data=json.dumps(dict(
                email=email,
                password=password,
                username=username
            )),
            content_type='application/json',
        )
    def test_registration(self):
        with self.client:
            response = self.register_user('joe_{}'.format(self.get_timestamp()),
                                          'joe_{}@gmail.com'.format(self.get_timestamp()), '123456')
            data = json.loads(response.data.decode())
            self.assertTrue(data['status'] == 'success')
            self.assertTrue(data['message'] == 'Successfully registered.')
            self.assertTrue(data['auth_token'])
            self.assertTrue(response.content_type == 'application/json')
            self.assertEqual(response.status_code, 201)

Note this is an open source project @ https://github.com/eshta/authentek

reproduce:

docker-compose up -d
make bash auth
make test