diff --git a/aiogram/types/input_media.py b/aiogram/types/input_media.py
index 2c782af5..e60913ff 100644
--- a/aiogram/types/input_media.py
+++ b/aiogram/types/input_media.py
@@ -282,8 +282,8 @@ class MediaGroup(base.TelegramObject):
         elif not isinstance(media, InputMedia):
             raise TypeError(f"Media must be an instance of InputMedia or dict, not {type(media).__name__}")
 
-        elif media.type in ('animation', ):
-            raise ValueError(f"This type of media is not supported by media groups!")
+        elif media.type == 'animation':
+            raise ValueError("This type of media is not supported by media groups!")
 
         self.media.append(media)