diff --git a/openclaw-opd/run_qwen3_4b_openclaw_opd.sh b/openclaw-opd/run_qwen3_4b_openclaw_opd.sh
index 6519f218e..43c722f78 100644
--- a/openclaw-opd/run_qwen3_4b_openclaw_opd.sh
+++ b/openclaw-opd/run_qwen3_4b_openclaw_opd.sh
@@ -11,7 +11,7 @@ pkill -9 python
 
 set -ex
 
-export PYTHONBUFFERED=16
+export PYTHONUNBUFFERED=1
 
 NUM_GPUS=${NUM_GPUS:-8}
 ACTOR_GPUS=${ACTOR_GPUS:-4}
diff --git a/openclaw-rl/run_qwen3_4b_openclaw_rl.sh b/openclaw-rl/run_qwen3_4b_openclaw_rl.sh
index 4cd973ff3..3e7c12e09 100755
--- a/openclaw-rl/run_qwen3_4b_openclaw_rl.sh
+++ b/openclaw-rl/run_qwen3_4b_openclaw_rl.sh
@@ -11,7 +11,7 @@ pkill -9 python
 
 set -ex
 
-export PYTHONBUFFERED=16
+export PYTHONUNBUFFERED=1
 
 NUM_GPUS=${NUM_GPUS:-8}
 ACTOR_GPUS=${ACTOR_GPUS:-4}