1 files changed, 7 insertions, 6 deletions
diff --git a/tests/edge_cases/test_extreme_values.py b/tests/edge_cases/test_extreme_values.py
index b375d5e..8ec3b77 100644
--- a/tests/edge_cases/test_extreme_values.py
+++ b/tests/edge_cases/test_extreme_values.py
@@ -1,7 +1,7 @@
 """Tests for extreme value edge cases."""
 
 import sys
-from datetime import datetime, timezone
+from datetime import UTC, datetime
 from decimal import Decimal
 from pathlib import Path
 
@@ -9,19 +9,20 @@ sys.path.insert(0, str(Path(__file__).resolve().parents[2] / "services" / "strat
 sys.path.insert(0, str(Path(__file__).resolve().parents[2] / "services" / "backtester" / "src"))
 sys.path.insert(0, str(Path(__file__).resolve().parents[2] / "services" / "order-executor" / "src"))
 
-from shared.models import Candle, Signal, OrderSide
-from strategies.rsi_strategy import RsiStrategy
-from strategies.vwap_strategy import VwapStrategy
-from strategies.bollinger_strategy import BollingerStrategy
 from backtester.engine import BacktestEngine
 from backtester.simulator import OrderSimulator
 from order_executor.risk_manager import RiskManager
+from strategies.bollinger_strategy import BollingerStrategy
+from strategies.rsi_strategy import RsiStrategy
+from strategies.vwap_strategy import VwapStrategy
+
+from shared.models import Candle, OrderSide, Signal
 
 
 def _candle(close: str, volume: str = "1000", idx: int = 0) -> Candle:
     from datetime import timedelta
 
-    base = datetime(2025, 1, 1, tzinfo=timezone.utc)
+    base = datetime(2025, 1, 1, tzinfo=UTC)
     return Candle(
         symbol="AAPL",
         timeframe="1h",