diff --git a/tests/unit/test_backtest_portfolio.py b/tests/unit/test_backtest_portfolio.py
index dcfff86..c1ad51c 100644
--- a/tests/unit/test_backtest_portfolio.py
+++ b/tests/unit/test_backtest_portfolio.py
@@ -358,4 +358,3 @@ def test_apply_trades_timestamp_vs_int_df() -> None:
 
     # 修复前交易被丢弃、持仓为 0
     assert tracker.positions["size"].iloc[0] == 100
-
diff --git a/tests/unit/test_portfolio_rebalance.py b/tests/unit/test_portfolio_rebalance.py
index 728db26..be76c75 100644
--- a/tests/unit/test_portfolio_rebalance.py
+++ b/tests/unit/test_portfolio_rebalance.py
@@ -129,4 +129,3 @@ class TestRebalanceEngine:
         result = engine.run(_make_market(), start_date=20240101, end_date=20240430)
         md = result.performance["max_drawdown"]
         assert 0.0 <= md <= 1.0, f"max_drawdown={md} 应落在 [0,1]"
-