diff --git a/python/src/trezorlib/transport/thp/channel_database.py b/python/src/trezorlib/transport/thp/channel_database.py
index b70f90cc0d..ce4385b5a3 100644
--- a/python/src/trezorlib/transport/thp/channel_database.py
+++ b/python/src/trezorlib/transport/thp/channel_database.py
@@ -3,7 +3,6 @@ import logging
 import os
 import typing as t
 
-
 from ..thp.channel_data import ChannelData
 from .protocol_and_channel import ProtocolAndChannel
 
@@ -19,6 +18,7 @@ else:
     DATA_PATH = os.path.join("./channel_data.json")
     CONFIG_PATH = os.path.join("./config.json")
 
+
 class ChannelDatabase:  # TODO not finished
     should_store: bool = False