diff --git a/vllm/logger.py b/vllm/logger.py
index b892ef06ff095..ccf09691a052a 100644
--- a/vllm/logger.py
+++ b/vllm/logger.py
@@ -17,10 +17,8 @@
 VLLM_LOGGING_LEVEL = envs.VLLM_LOGGING_LEVEL
 VLLM_LOGGING_PREFIX = envs.VLLM_LOGGING_PREFIX
 
-_FORMAT = (
-    f"{VLLM_LOGGING_PREFIX}%(levelname)s %(asctime)s "
-    "%(filename)s:%(lineno)d] %(message)s"
-)
+_FORMAT = (f"{VLLM_LOGGING_PREFIX}%(levelname)s %(asctime)s "
+           "%(filename)s:%(lineno)d] %(message)s")
 _DATE_FORMAT = "%m-%d %H:%M:%S"
 
 DEFAULT_LOGGING_CONFIG = {