Run Flask tests against a remote server

I'm writing "unittests" for my flask api. Using Flask.test_client() is easy locally. eg:

app = Flask(__name__)
client = app.test_client()

However, I want to still be able to do things such as

self.client.post('{0}/account/password'.format(self.base_path),
                              data=json.dumps(passwordu), headers=self.get_headers(),
                              content_type=self.content_type)

But I want the client to talk to a remote host.

I've seen I can use environ_override as a parameter to the client.post(...) method. To me there must be a simpler way to get a simple client that does the necessary sending of requests and decoding of responses in the same way test_client() does. However, subclassing client, still requires me to use a Flask instance.