diff --git a/livekit-rtc/livekit/rtc/chat.py b/livekit-rtc/livekit/rtc/chat.py
index b6d0a7e5..17220887 100644
--- a/livekit-rtc/livekit/rtc/chat.py
+++ b/livekit-rtc/livekit/rtc/chat.py
@@ -96,8 +96,7 @@ def _on_data_received(self, dp: DataPacket):
                 if self._callback:
                     self._callback(msg)
             except Exception as e:
-                logging.warning(
-                    "failed to parse chat message: %s", e, exc_info=e)
+                logging.warning("failed to parse chat message: %s", e, exc_info=e)
 
 
 @dataclass
diff --git a/livekit-rtc/tests/test_chat.py b/livekit-rtc/tests/test_chat.py
index 48be3b83..161bf9be 100644
--- a/livekit-rtc/tests/test_chat.py
+++ b/livekit-rtc/tests/test_chat.py
@@ -20,8 +20,9 @@ def test_message_serialization():
     msg2 = ChatMessage.from_jsondict(json.loads(json.dumps(data)))
     assert msg2.message == msg.message, "message should be the same"
     assert msg2.id == msg.id, "id should be the same"
-    assert int(msg2.timestamp.timestamp()/1000) == int(msg.timestamp.timestamp() /
-                                                       1000), "timestamp should be the same"
+    assert int(msg2.timestamp.timestamp() / 1000) == int(
+        msg.timestamp.timestamp() / 1000
+    ), "timestamp should be the same"
     assert not msg2.deleted, "not deleted"
 
     # deletion is handled