diff --git a/freqtrade/optimize/optimize_reports/bt_output.py b/freqtrade/optimize/optimize_reports/bt_output.py
index 7fe11225a..36ccc7484 100644
--- a/freqtrade/optimize/optimize_reports/bt_output.py
+++ b/freqtrade/optimize/optimize_reports/bt_output.py
@@ -102,7 +102,9 @@ def text_table_tags(
         [
             *(
                 (
-                    list(t["key"]) if isinstance(t["key"], (list, tuple)) else [t["key"], ""]
+                    list(t["key"])
+                    if isinstance(t["key"], (list, tuple))
+                    else [t["key"], ""]
                     if is_list
                     else [t["key"]]
                 )