diff --git a/google/genai/_transformers.py b/google/genai/_transformers.py
index 0e1a9c41c..54c1ee59e 100644
--- a/google/genai/_transformers.py
+++ b/google/genai/_transformers.py
@@ -1295,7 +1295,6 @@ def t_metrics(
     metrics_payload = []
 
     for metric in metrics:
-
       if isinstance(metric, dict):
         try:
           metric = types.UnifiedMetric.model_validate(metric)