diff --git a/tests/system-test/2-query/irate.py b/tests/system-test/2-query/irate.py
index a64e7695c3e3fa7b27e9288eeef59f1de838db51..9738879145b13a9796dbe25423e50f2cdd2e8ca5 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) <= 0.0000001:
+                    if abs(comput_irate_value - irate_value) <= 0.001:
                         tdLog.info(" irate work as expected , sql is %s "% irate_sql)
                     else:
                         tdLog.exit(" irate work not as expected , sql is %s "% irate_sql)
@@ -78,9 +78,11 @@ 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 table {dbname}.stb1
+            f'''create stable {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))
             '''