diff --git a/freqtrade/optimize/backtesting.py b/freqtrade/optimize/backtesting.py
index 7fe41c299..f7dee0c94 100644
--- a/freqtrade/optimize/backtesting.py
+++ b/freqtrade/optimize/backtesting.py
@@ -365,9 +365,10 @@ class Backtesting:
         :param position_stacking: do we allow position stacking?
         :return: DataFrame with trades (results of backtesting)
         """
-        logger.debug(f"Run backtest, stake_amount: {stake_amount}, "
-                     f"start_date: {start_date}, end_date: {end_date}, "
-                     f"max_open_trades: {max_open_trades}, position_stacking: {position_stacking}"
+        logger.debug(
+            f"Run backtest, stake_amount: {stake_amount}, "
+            f"start_date: {start_date}, end_date: {end_date}, "
+            f"max_open_trades: {max_open_trades}, position_stacking: {position_stacking}"
         )
         trades = []
         trade_count_lock: Dict = {}