style: auto-fix lint violations from enhanced ruff rules

1 files changed, 9 insertions, 7 deletions

diff --git a/shared/tests/test_sentiment_aggregator.py b/shared/tests/test_sentiment_aggregator.py
index a99c711..9193785 100644
--- a/shared/tests/test_sentiment_aggregator.py
+++ b/shared/tests/test_sentiment_aggregator.py
@@ -1,7 +1,9 @@
 """Tests for sentiment aggregator."""
 
+from datetime import UTC, datetime, timedelta
+
 import pytest
-from datetime import datetime, timezone, timedelta
+
 from shared.sentiment import SentimentAggregator
 
 
@@ -12,25 +14,25 @@ def aggregator():
 
 def test_freshness_decay_recent():
     a = SentimentAggregator()
-    now = datetime.now(timezone.utc)
+    now = datetime.now(UTC)
     assert a._freshness_decay(now, now) == 1.0
 
 
 def test_freshness_decay_3_hours():
     a = SentimentAggregator()
-    now = datetime.now(timezone.utc)
+    now = datetime.now(UTC)
     assert a._freshness_decay(now - timedelta(hours=3), now) == 0.7
 
 
 def test_freshness_decay_12_hours():
     a = SentimentAggregator()
-    now = datetime.now(timezone.utc)
+    now = datetime.now(UTC)
     assert a._freshness_decay(now - timedelta(hours=12), now) == 0.3
 
 
 def test_freshness_decay_old():
     a = SentimentAggregator()
-    now = datetime.now(timezone.utc)
+    now = datetime.now(UTC)
     assert a._freshness_decay(now - timedelta(days=2), now) == 0.0
 
 
@@ -44,7 +46,7 @@ def test_compute_composite():
 
 
 def test_aggregate_news_by_symbol(aggregator):
-    now = datetime.now(timezone.utc)
+    now = datetime.now(UTC)
     news_items = [
         {"symbols": ["AAPL"], "sentiment": 0.8, "category": "earnings", "published_at": now},
         {
@@ -64,7 +66,7 @@ def test_aggregate_news_by_symbol(aggregator):
 
 
 def test_aggregate_empty(aggregator):
-    now = datetime.now(timezone.utc)
+    now = datetime.now(UTC)
     assert aggregator.aggregate([], now) == {}