diff --git a/freqtrade/ft_types/backtest_result_type.py b/freqtrade/ft_types/backtest_result_type.py
index 4cd8f2a58..b8ddbb4b6 100644
--- a/freqtrade/ft_types/backtest_result_type.py
+++ b/freqtrade/ft_types/backtest_result_type.py
@@ -1,5 +1,5 @@
 from copy import deepcopy
-from typing import Any
+from typing import Any, cast
 
 from typing_extensions import TypedDict
 
@@ -16,12 +16,15 @@ class BacktestResultType(TypedDict):
 
 
 def get_BacktestResultType_default() -> BacktestResultType:
-    return deepcopy(
-        {
-            "metadata": {},
-            "strategy": {},
-            "strategy_comparison": [],
-        }
+    return cast(
+        BacktestResultType,
+        deepcopy(
+            {
+                "metadata": {},
+                "strategy": {},
+                "strategy_comparison": [],
+            }
+        ),
     )
 
 
diff --git a/freqtrade/strategy/interface.py b/freqtrade/strategy/interface.py
index 98e02cdd6..5cd873f23 100644
--- a/freqtrade/strategy/interface.py
+++ b/freqtrade/strategy/interface.py
@@ -132,6 +132,7 @@ class IStrategy(ABC, HyperStrategyMixin):
     stake_currency: str
     # container variable for strategy source code
     __source__: str = ""
+    __file__: str = ""
 
     # Definition of plot_config. See plotting documentation for more details.
     plot_config: dict = {}