def METHOD_NAME(self):
    url = "/api/v2/system/image-upload/"
    self.json["mime"] = None
    response = self.client.post(
        url, headers={"Authorization": self.user_token}, json=self.json
    )
    self.assertEqual(response.status_code, 400)
    self.assertEqual(response.json["Error"], "Missing mime parameter")
    self.assertEqual(response.json["SubCode"], "MissingMime")