flake happy

freqtrade/tests/optimize/test_backtesting.py

@@ -1,6 +1,5 @@
 # pragma pylint: disable=missing-docstring, W0212, line-too-long, C0103, unused-argument
 
-import json
 import math
 import random
 from unittest.mock import MagicMock
@@ -23,7 +22,7 @@ from freqtrade.state import RunMode
 from freqtrade.strategy.default_strategy import DefaultStrategy
 from freqtrade.strategy.interface import SellType
 from freqtrade.tests.conftest import (get_args, log_has, log_has_re, patch_exchange,
-        patched_configuration_open)
+                                      patched_configuration_open)
 
 
 def trim_dictlist(dict_list, num):
@@ -205,7 +204,10 @@ def test_setup_configuration_without_arguments(mocker, default_conf, caplog) ->
 
 def test_setup_bt_configuration_with_arguments(mocker, default_conf, caplog) -> None:
     patched_configuration_open(mocker, default_conf)
-    mocker.patch('freqtrade.configuration.configuration.Configuration._create_datadir', lambda s, c, x: x)
+    mocker.patch(
+        'freqtrade.configuration.configuration.Configuration._create_datadir',
+        lambda s, c, x: x
+    )
 
     args = [
         '--config', 'config.json',