diff --git a/telebot/__init__.py b/telebot/__init__.py
index d9bee07..33d459d 100644
--- a/telebot/__init__.py
+++ b/telebot/__init__.py
@@ -205,7 +205,6 @@ class TeleBot:
         :param filename: Filename of the file where handlers was saved
         :param del_file_after_loading: Is passed True, after loading save file will be deleted
         """
-        self.next_step_backend: FileHandlerBackend
         self.next_step_backend.load_handlers(filename, del_file_after_loading)
 
     def load_reply_handlers(self, filename="./.handler-saves/reply.save", del_file_after_loading=True):
@@ -221,7 +220,6 @@ class TeleBot:
         :param filename: Filename of the file where handlers was saved
         :param del_file_after_loading: Is passed True, after loading save file will be deleted
         """
-        self.reply_backend: FileHandlerBackend
         self.reply_backend.load_handlers(filename, del_file_after_loading)
 
     def set_webhook(self, url=None, certificate=None, max_connections=None, allowed_updates=None):
diff --git a/telebot/handler_backends.py b/telebot/handler_backends.py
index cb6c688..e71fb24 100644
--- a/telebot/handler_backends.py
+++ b/telebot/handler_backends.py
@@ -5,7 +5,7 @@ import threading
 from telebot import apihelper
 
 
-class HandlerBackend:
+class HandlerBackend(object):
     """
     Class for saving (next step|reply) handlers
     """
@@ -40,7 +40,7 @@ class MemoryHandlerBackend(HandlerBackend):
 
 class FileHandlerBackend(HandlerBackend):
     def __init__(self, handlers=None, filename='./.handler-saves/handlers.save', delay=120):
-        super().__init__(handlers)
+        super(FileHandlerBackend, self).__init__(handlers)
         self.filename = filename
         self.delay = delay
         self.timer = threading.Timer(delay, self.save_handlers)
@@ -116,7 +116,7 @@ class FileHandlerBackend(HandlerBackend):
 
 class RedisHandlerBackend(HandlerBackend):
     def __init__(self, handlers=None, host='localhost', port=6379, db=0, prefix='telebot'):
-        super().__init__(handlers)
+        super(RedisHandlerBackend, self).__init__(handlers)
         from redis import Redis
         self.prefix = prefix
         self.redis = Redis(host, port, db)
diff --git a/tests/test_handler_backends.py b/tests/test_handler_backends.py
index badc634..6ed2c18 100644
--- a/tests/test_handler_backends.py
+++ b/tests/test_handler_backends.py
@@ -10,7 +10,8 @@ import time
 import pytest
 
 import telebot
-from telebot import types, MemoryHandlerBackend, FileHandlerBackend
+from telebot import types
+from telebot.handler_backends import MemoryHandlerBackend, FileHandlerBackend
 
 if REDIS_TESTS:
     from telebot.handler_backends import RedisHandlerBackend
@@ -230,8 +231,8 @@ def test_file_handler_backend_clear_next_step_handler(telegram_bot, private_chat
 
 
 def test_redis_handler_backend_register_next_step_handler(telegram_bot, private_chat, update_type):
-    if not(REDIS_TESTS):
-        return
+    if not REDIS_TESTS:
+        pytest.skip('please install redis and configure redis server, then enable REDIS_TESTS')
 
     telegram_bot.next_step_backend = RedisHandlerBackend(prefix='pyTelegramBotApi:step_backend1')
 
@@ -248,8 +249,8 @@ def test_redis_handler_backend_register_next_step_handler(telegram_bot, private_
 
 
 def test_redis_handler_backend_clear_next_step_handler(telegram_bot, private_chat, update_type):
-    if not(REDIS_TESTS):
-        return
+    if not REDIS_TESTS:
+        pytest.skip('please install redis and configure redis server, then enable REDIS_TESTS')
 
     telegram_bot.next_step_backend = RedisHandlerBackend(prefix='pyTelegramBotApi:step_backend2')