diff --git a/src/deltaglider/adapters/metrics_cloudwatch.py b/src/deltaglider/adapters/metrics_cloudwatch.py
index 0b8a580..c838fd5 100644
--- a/src/deltaglider/adapters/metrics_cloudwatch.py
+++ b/src/deltaglider/adapters/metrics_cloudwatch.py
@@ -200,21 +200,12 @@ class LoggingMetricsAdapter(MetricsPort):
 
     def increment(self, name: str, value: int = 1, tags: dict[str, str] | None = None) -> None:
         """Log counter increment."""
-        logger.log(
-            self.log_level,
-            f"METRIC:INCREMENT {name}={value} tags={tags or {}}"
-        )
+        logger.log(self.log_level, f"METRIC:INCREMENT {name}={value} tags={tags or {}}")
 
     def gauge(self, name: str, value: float, tags: dict[str, str] | None = None) -> None:
         """Log gauge value."""
-        logger.log(
-            self.log_level,
-            f"METRIC:GAUGE {name}={value:.2f} tags={tags or {}}"
-        )
+        logger.log(self.log_level, f"METRIC:GAUGE {name}={value:.2f} tags={tags or {}}")
 
     def timing(self, name: str, value: float, tags: dict[str, str] | None = None) -> None:
         """Log timing value."""
-        logger.log(
-            self.log_level,
-            f"METRIC:TIMING {name}={value:.2f}ms tags={tags or {}}"
-        )
\ No newline at end of file
+        logger.log(self.log_level, f"METRIC:TIMING {name}={value:.2f}ms tags={tags or {}}")
diff --git a/src/deltaglider/app/cli/main.py b/src/deltaglider/app/cli/main.py
index 20ba138..6cb9aed 100644
--- a/src/deltaglider/app/cli/main.py
+++ b/src/deltaglider/app/cli/main.py
@@ -61,6 +61,7 @@ def create_service(
     if metrics_type == "cloudwatch":
         # Import here to avoid dependency if not used
         from ...adapters.metrics_cloudwatch import CloudWatchMetricsAdapter
+
         metrics = CloudWatchMetricsAdapter(
             namespace=os.environ.get("DG_METRICS_NAMESPACE", "DeltaGlider"),
             region=region,
@@ -68,6 +69,7 @@ def create_service(
         )
     elif metrics_type == "logging":
         from ...adapters.metrics_cloudwatch import LoggingMetricsAdapter
+
         metrics = LoggingMetricsAdapter(log_level=log_level)
     else:
         metrics = NoopMetricsAdapter()
diff --git a/src/deltaglider/client.py b/src/deltaglider/client.py
index 3ac8c90..085aa52 100644
--- a/src/deltaglider/client.py
+++ b/src/deltaglider/client.py
@@ -281,7 +281,7 @@ class DeltaGliderClient:
         # Use storage adapter's list_objects method if available
         from .adapters.storage_s3 import S3StorageAdapter
 
-        if hasattr(self.service.storage, 'list_objects'):
+        if hasattr(self.service.storage, "list_objects"):
             # Use list_objects method if available
             result = self.service.storage.list_objects(
                 bucket=Bucket,
@@ -1072,7 +1072,7 @@ class DeltaGliderClient:
         storage_adapter = self.service.storage
 
         # Check if storage adapter has boto3 client
-        if hasattr(storage_adapter, 'client'):
+        if hasattr(storage_adapter, "client"):
             try:
                 # Use boto3's native presigned URL generation
                 url = storage_adapter.client.generate_presigned_url(
@@ -1095,9 +1095,7 @@ class DeltaGliderClient:
             base_url = f"https://{bucket}.s3.amazonaws.com"
 
         # Warning: This is not a real presigned URL, just a placeholder
-        self.service.logger.warning(
-            "Using placeholder presigned URL - not suitable for production"
-        )
+        self.service.logger.warning("Using placeholder presigned URL - not suitable for production")
         return f"{base_url}/{key}?expires={ExpiresIn}"
 
     def generate_presigned_post(
@@ -1123,7 +1121,7 @@ class DeltaGliderClient:
         storage_adapter = self.service.storage
 
         # Check if storage adapter has boto3 client
-        if hasattr(storage_adapter, 'client'):
+        if hasattr(storage_adapter, "client"):
             try:
                 # Use boto3's native presigned POST generation
                 response = storage_adapter.client.generate_presigned_post(
@@ -1148,7 +1146,7 @@ class DeltaGliderClient:
             "fields": {
                 "key": Key,
                 **(Fields or {}),
-            }
+            },
         }
 
     def _parse_tagging(self, tagging: str) -> dict[str, str]:
diff --git a/tests/integration/test_client.py b/tests/integration/test_client.py
index dc28739..c539eed 100644
--- a/tests/integration/test_client.py
+++ b/tests/integration/test_client.py
@@ -148,9 +148,7 @@ class TestBoto3Compatibility:
 
     def test_put_object_with_bytes(self, client):
         """Test put_object with byte data."""
-        response = client.put_object(
-            Bucket="test-bucket", Key="test.txt", Body=b"Hello World"
-        )
+        response = client.put_object(Bucket="test-bucket", Key="test.txt", Body=b"Hello World")
 
         assert "ETag" in response
         assert response["ResponseMetadata"]["HTTPStatusCode"] == 200
@@ -161,9 +159,7 @@ class TestBoto3Compatibility:
 
     def test_put_object_with_string(self, client):
         """Test put_object with string data."""
-        response = client.put_object(
-            Bucket="test-bucket", Key="test2.txt", Body="Hello String"
-        )
+        response = client.put_object(Bucket="test-bucket", Key="test2.txt", Body="Hello String")
 
         assert "ETag" in response
         obj = client.service.storage.objects["test-bucket/test2.txt"]