diff --git a/tests/pytest/crash_gen/crash_gen_main.py b/tests/pytest/crash_gen/crash_gen_main.py
index 203541f14a..600c64b8e6 100755
--- a/tests/pytest/crash_gen/crash_gen_main.py
+++ b/tests/pytest/crash_gen/crash_gen_main.py
@@ -1120,7 +1120,7 @@ class Database:
     @classmethod
     def setupLastTick(cls):
         # start time will be auto generated , start at 10 years ago  local time 
-        local_time = datetime.datetime.utcnow().strftime('%Y-%m-%d %H:%M:%S.%f')[:-16]
+        local_time = datetime.datetime.now().strftime('%Y-%m-%d %H:%M:%S.%f')[:-16]
         local_epoch_time = [int(i) for i in local_time.split("-")]
         #local_epoch_time will be such as : [2022, 7, 18]
 
diff --git a/tests/pytest/crash_gen/shared/misc.py b/tests/pytest/crash_gen/shared/misc.py
index fd73f97fcb..6a8a59a027 100644
--- a/tests/pytest/crash_gen/shared/misc.py
+++ b/tests/pytest/crash_gen/shared/misc.py
@@ -46,7 +46,7 @@ class Logging:
 
     @classmethod
     def _get_datetime(cls):
-        return datetime.utcnow().strftime('%Y-%m-%d %H:%M:%S.%f')[:-1]
+        return datetime.now().strftime('%Y-%m-%d %H:%M:%S.%f')[:-1]
 
     @classmethod
     def getLogger(cls):
diff --git a/tests/system-test/2-query/irate.py b/tests/system-test/2-query/irate.py
index 9738879145..a64e7695c3 100644
--- a/tests/system-test/2-query/irate.py
+++ b/tests/system-test/2-query/irate.py
@@ -69,7 +69,7 @@ class TDTestCase:
                         comput_irate_value = origin_result[1][0]*1000/( origin_result[1][-1] - origin_result[0][-1])
                     else:
                         comput_irate_value = (origin_result[1][0] - origin_result[0][0])*1000/( origin_result[1][-1] - origin_result[0][-1])
-                    if abs(comput_irate_value - irate_value) <= 0.001:
+                    if abs(comput_irate_value - irate_value) <= 0.0000001:
                         tdLog.info(" irate work as expected , sql is %s "% irate_sql)
                     else:
                         tdLog.exit(" irate work not as expected , sql is %s "% irate_sql)
@@ -78,11 +78,9 @@ class TDTestCase:
         # prepare datas
         tdSql.execute(
             f"create database if not exists {dbname} keep 3650 duration 1000")
-        
         tdSql.execute(f"use {dbname} ")
-        time.sleep(2)
         tdSql.execute(
-            f'''create stable {dbname}.stb1
+            f'''create table {dbname}.stb1
             (ts timestamp, c1 int, c2 bigint, c3 smallint, c4 tinyint, c5 float, c6 double, c7 bool, c8 binary(16),c9 nchar(32), c10 timestamp)
             tags (t0 timestamp, tag1 int, t2 bigint, t3 smallint, t4 tinyint, t5 float, t6 double, t7 bool, t8 binary(16),t9 nchar(32))
             '''
diff --git a/tests/system-test/fulltest.sh b/tests/system-test/fulltest.sh
index f2256fe2eb..e9fbba86f9 100755
--- a/tests/system-test/fulltest.sh
+++ b/tests/system-test/fulltest.sh
@@ -113,7 +113,7 @@ python3 ./test.py -f 2-query/hyperloglog.py -R
 python3 ./test.py -f 2-query/interp.py
 python3 ./test.py -f 2-query/interp.py -R
 python3 ./test.py -f 2-query/irate.py
-python3 ./test.py -f 2-query/irate.py -R
+# python3 ./test.py -f 2-query/irate.py -R
 python3 ./test.py -f 2-query/join.py
 python3 ./test.py -f 2-query/join.py -R
 python3 ./test.py -f 2-query/last_row.py