diff --git a/tests/pytest/crash_gen/crash_gen_main.py b/tests/pytest/crash_gen/crash_gen_main.py
index 90d27c3b8d..2aa499285f 100755
--- a/tests/pytest/crash_gen/crash_gen_main.py
+++ b/tests/pytest/crash_gen/crash_gen_main.py
@@ -2039,7 +2039,7 @@ class TdSuperTable:
             conf.set("enable.auto.commit", "true")
             def tmq_commit_cb_print(tmq, resp, offset, param=None):
                 print(f"commit: {resp}, tmq: {tmq}, offset: {offset}, param: {param}")
-            conf.set_auto_commit_cb(tmq_commit_cb_print, None)
+            # conf.set_auto_commit_cb(tmq_commit_cb_print, None)
             consumer = conf.new_consumer()   
             topic_list = TaosTmqList()
             for topic in current_topic_list:
@@ -2049,13 +2049,12 @@ class TdSuperTable:
             except TmqError as e :
                 pass
 
-            # consumer work  only 30 sec 
+            # consumer with random work life 
             time_start = time.time()
             while 1:
                 res = consumer.poll(1000)
-                if time.time() - time_start >5 :
+                if time.time() - time_start >random.randint(5,50) :
                     break
-            # time.sleep(10)
             try:
                 consumer.unsubscribe()
             except TmqError as e :