diff --git a/tests/pytest/alter/alter_keep.py b/tests/pytest/alter/alter_keep.py
index 9f66b08823d4a137dd16a323e43463d7d6189c6a..72ca635ac3df60eb0caaf206220eea279420be5b 100644
--- a/tests/pytest/alter/alter_keep.py
+++ b/tests/pytest/alter/alter_keep.py
@@ -15,6 +15,7 @@ import sys
 from util.log import *
 from util.cases import *
 from util.sql import *
+import time
 
 
 class TDTestCase:
@@ -129,9 +130,6 @@ class TDTestCase:
 
         tdSql.prepare()
 
-        ##TODO: need to wait for TD-4445 to implement the following
-        ##      tests
-
 
         ## preset the keep
         tdSql.prepare()
@@ -176,20 +174,22 @@ class TDTestCase:
         tdSql.error('insert into tb values (now-15d, 10)')
         tdSql.query('select * from tb')
         tdSql.checkRows(rowNum)
-
+        
         tdLog.notice('testing keep will be altered if sudden change from small to big')
-        tdSql.execute('alter database db keep 14,14,14')
-        tdSql.execute('alter database db keep 15,15,15')
-        tdSql.execute('insert into tb values (now-15d, 10)')
-        tdSql.query('select * from tb')
-        tdSql.checkRows(rowNum + 1)
+        for i in range(30):
+            tdSql.execute('alter database db keep 14,14,14')
+            tdSql.execute('alter database db keep 16,16,16')
+            tdSql.execute('insert into tb values (now-15d, 10)')
+            tdSql.query('select * from tb')
+            rowNum += 1
+            tdSql.checkRows(rowNum )
 
         tdLog.notice('testing keep will be altered if sudden change from big to small')
         tdSql.execute('alter database db keep 16,16,16')
         tdSql.execute('alter database db keep 14,14,14')
         tdSql.error('insert into tb values (now-15d, 10)')
         tdSql.query('select * from tb')
-        tdSql.checkRows(rowNum + 1)
+        tdSql.checkRows(rowNum)
 
 
 
diff --git a/tests/pytest/client/change_time_1_1.py b/tests/pytest/client/change_time_1_1.py
index abae49a41f32aeb482a3eb8b06ff4485ec7757e9..54984747b522741a73955a988d16c4a19fef251b 100644
--- a/tests/pytest/client/change_time_1_1.py
+++ b/tests/pytest/client/change_time_1_1.py
@@ -19,6 +19,7 @@ from util.pathFinding import *
 from util.dnodes import tdDnodes
 from datetime import datetime
 import subprocess
+import time
 
 ##TODO: this is now automatic, but not sure if this will run through jenkins
 class TDTestCase:
@@ -63,6 +64,7 @@ class TDTestCase:
         tdSql.query('select first(ts) from stb_0')
         tdSql.checkData(0,0,datetime(2020,10,14,8,0,0,0)) #check the last data in the database
         os.system('sudo timedatectl set-ntp on')
+        time.sleep(5)
 
     def stop(self):
         os.system('sudo timedatectl set-ntp on')
diff --git a/tests/pytest/client/change_time_1_2.py b/tests/pytest/client/change_time_1_2.py
index 855b04873c172682f7c869487ee6a254e1f36787..0937080b5cdc210af9be190c12e143bf185c8a8c 100644
--- a/tests/pytest/client/change_time_1_2.py
+++ b/tests/pytest/client/change_time_1_2.py
@@ -71,6 +71,7 @@ class TDTestCase:
         else:
             tdLog.debug("data file number correct")
         os.system('sudo timedatectl set-ntp on')
+        time.sleep(5)
 
     def stop(self):
         os.system('sudo timedatectl set-ntp on')