diff --git a/superbench/common/utils/stdout_logging.py b/superbench/common/utils/stdout_logging.py
index d127113fd..7db5b0e0d 100644
--- a/superbench/common/utils/stdout_logging.py
+++ b/superbench/common/utils/stdout_logging.py
@@ -78,6 +78,7 @@ def stop(self):
         """Restore the sys.stdout to termital."""
         if self.logger_stream is not None:
             self.logger_stream.restore()
+        self.logger_stream = None
 
     def log(self, message):
         """Write the message into the logger.