style: auto-fix lint violations from enhanced ruff rules

1 files changed, 6 insertions, 5 deletions

diff --git a/tests/edge_cases/test_zero_volume.py b/tests/edge_cases/test_zero_volume.py
index ba2c133..df247cc 100644
--- a/tests/edge_cases/test_zero_volume.py
+++ b/tests/edge_cases/test_zero_volume.py
@@ -1,21 +1,22 @@
 """Tests for strategies handling zero-volume candles gracefully."""
 
 import sys
-from datetime import datetime, timezone
+from datetime import UTC, datetime
 from decimal import Decimal
 from pathlib import Path
 
 sys.path.insert(0, str(Path(__file__).resolve().parents[2] / "services" / "strategy-engine"))
 sys.path.insert(0, str(Path(__file__).resolve().parents[2] / "services" / "backtester" / "src"))
 
-from shared.models import Candle
-from strategies.vwap_strategy import VwapStrategy
-from strategies.volume_profile_strategy import VolumeProfileStrategy
 from strategies.rsi_strategy import RsiStrategy
+from strategies.volume_profile_strategy import VolumeProfileStrategy
+from strategies.vwap_strategy import VwapStrategy
+
+from shared.models import Candle
 
 
 def _candle(close: str, volume: str = "0", idx: int = 0) -> Candle:
-    base = datetime(2025, 1, 1, tzinfo=timezone.utc)
+    base = datetime(2025, 1, 1, tzinfo=UTC)
     from datetime import timedelta
 
     return Candle(