diff --git a/tests/kit/model_zoo/transformers/gpt.py b/tests/kit/model_zoo/transformers/gpt.py
index 67b648382..44d859e48 100644
--- a/tests/kit/model_zoo/transformers/gpt.py
+++ b/tests/kit/model_zoo/transformers/gpt.py
@@ -113,7 +113,7 @@ config = transformers.GPT2Config(
     problem_type="single_label_classification",
     pad_token_id=1022,
     tie_word_embeddings=True,
-    attn_implementation="eager"
+    attn_implementation="eager",
 )
 
 config_for_token_classification = copy.deepcopy(config)