diff --git a/freqtrade/strategy/interface.py b/freqtrade/strategy/interface.py
index 62ef4e91b..5f7ef8590 100644
--- a/freqtrade/strategy/interface.py
+++ b/freqtrade/strategy/interface.py
@@ -5,7 +5,7 @@ This module defines the interface to apply for strategies
 import logging
 import warnings
 from abc import ABC, abstractmethod
-from datetime import datetime, timezone, timedelta
+from datetime import datetime, timedelta, timezone
 from enum import Enum
 from typing import Dict, List, NamedTuple, Optional, Tuple
 
@@ -487,11 +487,15 @@ class IStrategy(ABC):
 
     def ignore_expired_candle(self, dataframe: DataFrame, buy: bool):
         if self.ignore_buying_expired_candle and buy:
-            current_time = datetime.now(timezone.utc) - timedelta(seconds=self.ignore_buying_expired_candle_after)
+            current_time = datetime.now(timezone.utc) - timedelta(
+                seconds=self.ignore_buying_expired_candle_after)
             candle_time = dataframe['date'].tail(1).iat[0]
             time_delta = current_time - candle_time
             if time_delta.total_seconds() > self.ignore_buying_expired_candle_after:
-                logger.debug('ignoring buy signals because candle exceeded ignore_buying_expired_candle_after of %s seconds', self.ignore_buying_expired_candle_after)
+                logger.debug(
+                    '''ignoring buy signals because candle exceeded
+                    ignore_buying_expired_candle_after of %s seconds''',
+                    self.ignore_buying_expired_candle_after)
                 return True
         else:
             return False
diff --git a/tests/strategy/test_interface.py b/tests/strategy/test_interface.py
index 330689039..f389be45b 100644
--- a/tests/strategy/test_interface.py
+++ b/tests/strategy/test_interface.py
@@ -120,7 +120,7 @@ def test_ignore_expired_candle(default_conf, ohlcv_history):
     mocked_history.loc[1, 'buy'] = 1
     mocked_history.loc[1, 'sell'] = 1
 
-    assert strategy.ignore_expired_candle(mocked_history, True) == True
+    assert strategy.ignore_expired_candle(mocked_history, True) is True
 
 
 def test_assert_df_raise(mocker, caplog, ohlcv_history):