human
Solve the following python programming problem given the following code:
@ mock.patch ('time.time', new = (lambda : fake_time)) 
def test_refresh_token_request(self) : 
    self.expired_token = dict (self.token) 
    self.expired_token ['expires_in'] = '-1' 
    del self.expired_token ['expires_at'] 
    def fake_refresh(r, **kwargs) : 
        resp = mock.MagicMock () 
        resp.text = json.dumps (self.token) 
        return resp 
for client in self.clients : 
        auth = OAuth2Session (client = client, token = fake_refresh.expired_token) 
        self.assertRaises (TokenExpiredError, auth.get, 'https://i.b') 
for client in self.clients : 
        auth = OAuth2Session (client = client, token = self.expired_token, auto_refresh_url = 'https://i.b/refresh') 
        auth.send = fake_refresh 
        self.assertRaises (TokenUpdated, auth.get, 'https://i.b') 
def token_updater(token) : 
        self.assertEqual (token, self.token) 
for client in self.clients : 
        auth = OAuth2Session (client = client, token = self.expired_token, auto_refresh_url = 'https://i.b/refresh', token_updater = token_updater) 
        auth.send = fake_refresh 
        auth.get ('https://i.b') 

    
    

    Fix the buggy line: auth = OAuth2Session (client = client, token = fake_refresh.expired_token)
assistant
#Here is Python code to fix the buggy line: auth = OAuth2Session (client = client, token = fake_refresh.

auth = OAuth2Session (client = client, token = self.expired_token)