diff --git a/docker/compose/s3tests.conf b/docker/compose/s3tests.conf
index 3b0629fcb..98c716d02 100644
--- a/docker/compose/s3tests.conf
+++ b/docker/compose/s3tests.conf
@@ -5,7 +5,7 @@
 host = 127.0.0.1
 
 # port set for rgw in vstart.sh
-port = 8000
+port = 8333
 
 ## say "False" to disable TLS
 is_secure = False
diff --git a/weed/s3api/s3api_object_handlers_put.go b/weed/s3api/s3api_object_handlers_put.go
index b534f9662..ec6f97e31 100644
--- a/weed/s3api/s3api_object_handlers_put.go
+++ b/weed/s3api/s3api_object_handlers_put.go
@@ -600,6 +600,10 @@ func mapValidationErrorToS3Error(err error) s3err.ErrorCode {
 		// For malformed XML in request body, return MalformedXML
 		// This matches the test expectations for invalid retention mode and legal hold status
 		return s3err.ErrMalformedXML
+	case errors.Is(err, ErrInvalidRetentionPeriod):
+		// For invalid retention period (e.g., Days <= 0), return InvalidRetentionPeriod
+		// This matches the test expectations
+		return s3err.ErrInvalidRetentionPeriod
 	// Validation error constants
 	case errors.Is(err, ErrObjectLockConfigurationMissingEnabled):
 		return s3err.ErrMalformedXML
diff --git a/weed/s3api/s3api_object_retention.go b/weed/s3api/s3api_object_retention.go
index ca4c38a27..deef7dee1 100644
--- a/weed/s3api/s3api_object_retention.go
+++ b/weed/s3api/s3api_object_retention.go
@@ -226,26 +226,38 @@ func validateDefaultRetention(retention *DefaultRetention) error {
 		return ErrInvalidDefaultRetentionMode
 	}
 
-	// Exactly one of Days or Years must be specified
-	if retention.Days == 0 && retention.Years == 0 {
-		return ErrDefaultRetentionMissingPeriod
+	// Check for invalid Years value (negative values are always invalid)
+	if retention.Years < 0 {
+		return ErrInvalidRetentionPeriod
 	}
 
-	if retention.Days > 0 && retention.Years > 0 {
-		return ErrDefaultRetentionBothDaysAndYears
+	// Check for invalid Days value (negative values are invalid)
+	if retention.Days < 0 {
+		return ErrInvalidRetentionPeriod
 	}
 
-	// Validate ranges - Days must be greater than 0
-	if retention.Days <= 0 {
+	// Check for Days: 0 when Years is also 0 (this should return InvalidRetentionPeriod)
+	if retention.Days == 0 && retention.Years == 0 {
 		return ErrInvalidRetentionPeriod
 	}
 
-	if retention.Days > MaxRetentionDays {
-		return ErrDefaultRetentionDaysOutOfRange
+	// Check for both Days and Years being specified
+	if retention.Days > 0 && retention.Years > 0 {
+		return ErrDefaultRetentionBothDaysAndYears
+	}
+
+	// Validate Days if specified
+	if retention.Days > 0 {
+		if retention.Days > MaxRetentionDays {
+			return ErrDefaultRetentionDaysOutOfRange
+		}
 	}
 
-	if retention.Years < 0 || retention.Years > MaxRetentionYears {
-		return ErrDefaultRetentionYearsOutOfRange
+	// Validate Years if specified
+	if retention.Years > 0 {
+		if retention.Years > MaxRetentionYears {
+			return ErrDefaultRetentionYearsOutOfRange
+		}
 	}
 
 	return nil