diff --git a/test/ci/test_tiktok.py b/test/ci/test_tiktok.py
index cda730059..7fd7f8f93 100644
--- a/test/ci/test_tiktok.py
+++ b/test/ci/test_tiktok.py
@@ -33,7 +33,7 @@ class TikTokTestYoutubeDl(unittest.TestCase):
         params = {}
         ydl = youtube_dl.YoutubeDL(params)
         info = ydl.extract_info(url, download=True)
-        file_name="Imagine lebron freaking out over something you did! #foryou #ballislife #lebron #nba-6783617809113943301.mp.4"
+        file_name="Imagine lebron freaking out over something you did! #foryou #ballislife #lebron #nba-6783617809113943301.mp4"
         self.assertTrue(os.path.exists(file_name))
         os.remove(file_name)
 
diff --git a/youtube_dl/extractor/tiktok.py b/youtube_dl/extractor/tiktok.py
index f18526ab8..0dbf230ac 100644
--- a/youtube_dl/extractor/tiktok.py
+++ b/youtube_dl/extractor/tiktok.py
@@ -22,8 +22,8 @@ class TikTokBaseIE(InfoExtractor):
             formats.append({
                 'url': format,
                 'height': height,
-                'ext': 'mp4',
                 'width': width,
+                'ext': 'mp4',
             })
         self._sort_formats(formats)
         return {