diff --git a/tests/entrypoints/openai/test_metrics.py b/tests/entrypoints/openai/test_metrics.py
index 54e1e0fdb9e94..87a54897de85e 100644
--- a/tests/entrypoints/openai/test_metrics.py
+++ b/tests/entrypoints/openai/test_metrics.py
@@ -75,8 +75,9 @@ async def client(server):
      ("_count", _NUM_REQUESTS)],
     "vllm:prompt_tokens": [("_total",
                             _NUM_REQUESTS * _NUM_PROMPT_TOKENS_PER_REQUEST)],
-    "vllm:generation_tokens":
-    [("_total", _NUM_REQUESTS * _NUM_PROMPT_TOKENS_PER_REQUEST)],
+    "vllm:generation_tokens": [
+        ("_total", _NUM_REQUESTS * _NUM_PROMPT_TOKENS_PER_REQUEST)
+    ],
     "vllm:request_success": [("_total", _NUM_REQUESTS)],
 }
 
diff --git a/vllm/engine/llm_engine.py b/vllm/engine/llm_engine.py
index 9079857b66236..1028f1424aa63 100644
--- a/vllm/engine/llm_engine.py
+++ b/vllm/engine/llm_engine.py
@@ -1793,7 +1793,8 @@ def _get_stats(self,
                     ])
                     if seq_group.sampling_params is not None:
                         n_requests.append(seq_group.sampling_params.n)
-                        max_tokens_requests.append(seq_group.sampling_params.max_tokens)
+                        max_tokens_requests.append(
+                            seq_group.sampling_params.max_tokens)
                     finished_reason_requests.extend([
                         SequenceStatus.get_finished_reason(seq.status)
                         for seq in seq_group.get_finished_seqs()