diff --git a/python/sglang/srt/managers/scheduler_components/output_streamer.py b/python/sglang/srt/managers/scheduler_components/output_streamer.py
index 96f12d330..6941fc357 100644
--- a/python/sglang/srt/managers/scheduler_components/output_streamer.py
+++ b/python/sglang/srt/managers/scheduler_components/output_streamer.py
@@ -108,8 +108,6 @@ class SchedulerOutputStreamer:
     def _trigger_crash_for_tests(self, crash_threshold: int):
         # Crash trigger: crash after stream_output is called N times
         # This is used for testing purposes.
-        if not hasattr(self, "_test_stream_output_count"):
-            self._test_stream_output_count = 0
         self._test_stream_output_count += 1
         if self._test_stream_output_count >= crash_threshold:
             raise RuntimeError(