diff --git a/youtube_dl/extractor/aliexpress.py b/youtube_dl/extractor/aliexpress.py
index 810b9b9fb..86a2be321 100644
--- a/youtube_dl/extractor/aliexpress.py
+++ b/youtube_dl/extractor/aliexpress.py
@@ -2,10 +2,11 @@
 from __future__ import unicode_literals
 
 from .common import InfoExtractor
-from ..utils import unified_strdate
 from datetime import datetime
 
+
 class AliExpressLiveIE(InfoExtractor):
+
     _VALID_URL = r'https?://live\.aliexpress\.com/live/(?P<id>[0-9]{16})'
     _TEST = [{
         'url': 'https://live.aliexpress.com/live/2800002704436634',