diff --git a/freqtrade/persistence/models.py b/freqtrade/persistence/models.py
index 9de1947db..e785ba49b 100644
--- a/freqtrade/persistence/models.py
+++ b/freqtrade/persistence/models.py
@@ -325,6 +325,7 @@ class LocalTrade():
         if self.isolated_liq:
             self.set_isolated_liq(self.isolated_liq)
         self.recalc_open_trade_value()
+        # TODO-lev: Throw exception if on margin and interest_rate is none
 
     def _set_stop_loss(self, stop_loss: float, percent: float):
         """
diff --git a/tests/conftest.py b/tests/conftest.py
index 188236f40..609823409 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -6,6 +6,7 @@ from copy import deepcopy
 from datetime import datetime, timedelta
 from functools import reduce
 from pathlib import Path
+from typing import Tuple
 from unittest.mock import MagicMock, Mock, PropertyMock
 
 import arrow
@@ -262,6 +263,10 @@ def create_mock_trades_with_leverage(fee, use_db: bool = True):
         Trade.query.session.flush()
 
 
+def get_sides(is_short: bool) -> Tuple[str, str]:
+    return ("sell", "buy") if is_short else ("buy", "sell")
+
+
 @pytest.fixture(autouse=True)
 def patch_coingekko(mocker) -> None:
     """