diff --git a/freqtrade/optimize/hyperopt_tools.py b/freqtrade/optimize/hyperopt_tools.py
index ee3366a4e..f655582c4 100644
--- a/freqtrade/optimize/hyperopt_tools.py
+++ b/freqtrade/optimize/hyperopt_tools.py
@@ -362,8 +362,7 @@ class HyperoptTools():
         )
         trials['Avg duration'] = trials['Avg duration'].apply(
             lambda x: f'{x:,.1f} m' if isinstance(
-                x, float) else f"{x.total_seconds() // 60:,.1f} m"
-                      if not isna(x) else ""
+                x, float) else f"{x.total_seconds() // 60:,.1f} m" if not isna(x) else ""
         )
         trials['Objective'] = trials['Objective'].apply(
             lambda x: f'{x:,.5f}' if x != 100000 else ""
diff --git a/tests/commands/test_commands.py b/tests/commands/test_commands.py
index 60e6d2ea8..4d3937d87 100644
--- a/tests/commands/test_commands.py
+++ b/tests/commands/test_commands.py
@@ -918,7 +918,8 @@ def test_start_test_pairlist(mocker, caplog, tickers, default_conf, capsys):
                     captured.out)
 
 
-def test_hyperopt_list(mocker, capsys, caplog, saved_hyperopt_results, saved_hyperopt_results_legacy):
+def test_hyperopt_list(mocker, capsys, caplog, saved_hyperopt_results,
+                       saved_hyperopt_results_legacy):
     for _ in (saved_hyperopt_results, saved_hyperopt_results_legacy):
         mocker.patch(
             'freqtrade.optimize.hyperopt_tools.HyperoptTools.load_previous_results',