diff --git a/tests/optimize/__init__.py b/tests/optimize/__init__.py
index 524db093e..13605a38c 100644
--- a/tests/optimize/__init__.py
+++ b/tests/optimize/__init__.py
@@ -1,4 +1,4 @@
-from typing import Dict, List, NamedTuple
+from typing import Dict, List, NamedTuple, Optional
 
 import arrow
 from pandas import DataFrame
@@ -30,7 +30,7 @@ class BTContainer(NamedTuple):
     profit_perc: float
     trailing_stop: bool = False
     trailing_only_offset_is_reached: bool = False
-    trailing_stop_positive: float = None
+    trailing_stop_positive: Optional[float] = None
     trailing_stop_positive_offset: float = 0.0
     use_sell_signal: bool = False
 
diff --git a/tests/optimize/test_backtest_detail.py b/tests/optimize/test_backtest_detail.py
index bd2765430..e7bc76c1d 100644
--- a/tests/optimize/test_backtest_detail.py
+++ b/tests/optimize/test_backtest_detail.py
@@ -364,7 +364,7 @@ def test_backtest_results(default_conf, fee, mocker, caplog, data) -> None:
     default_conf["trailing_stop"] = data.trailing_stop
     default_conf["trailing_only_offset_is_reached"] = data.trailing_only_offset_is_reached
     # Only add this to configuration If it's necessary
-    if data.trailing_stop_positive:
+    if data.trailing_stop_positive is not None:
         default_conf["trailing_stop_positive"] = data.trailing_stop_positive
     default_conf["trailing_stop_positive_offset"] = data.trailing_stop_positive_offset
     default_conf["ask_strategy"] = {"use_sell_signal": data.use_sell_signal}