diff --git a/tests/pytest/update/update_options.py b/tests/pytest/update/update_options.py
index dd1b82fc596a3a977b028234900337474b971ec2..f70ac6cc1d4299e481af30e2e9d24c3b24631856 100644
--- a/tests/pytest/update/update_options.py
+++ b/tests/pytest/update/update_options.py
@@ -63,6 +63,7 @@ class TDTestCase:
         tdLog.sleep(3)
         
         # test case for https://jira.taosdata.com:18080/browse/TS-402
+        tdLog.info("test case for update option 1")
         tdSql.execute("create database test update 1")
         tdSql.execute("use test")
 
@@ -75,7 +76,39 @@ class TDTestCase:
         tdSql.checkData(0, 2, None)
         tdSql.checkData(0, 3, 9)
 
-        
+        tdSql.execute("drop table if exists tb")
+        tdSql.execute("create table tb (ts timestamp, c1 int, c2 int, c3 int)")
+        tdSql.execute("insert into tb values(%d, 1, 2, 3)(%d, null, 4, 5)(%d, 6, null, 7)" % (self.ts, self.ts, self.ts))
+
+        tdSql.query("select * from tb")
+        tdSql.checkRows(1)
+        tdSql.checkData(0, 1, 6)
+        tdSql.checkData(0, 2, None)
+        tdSql.checkData(0, 3, 7)
+
+        # https://jira.taosdata.com:18080/browse/TS-424
+        tdLog.info("test case for update option 2")
+        tdSql.execute("create database db2 update 2")
+        tdSql.execute("use db2")
+
+        tdSql.execute("create table tb (ts timestamp, c1 int, c2 int, c3 int)")
+        tdSql.execute("insert into tb values(%d, 1, 2, 3)(%d, null, null, 9)" % (self.ts, self.ts))
+
+        tdSql.query("select * from tb")
+        tdSql.checkRows(1)
+        tdSql.checkData(0, 1, 1)
+        tdSql.checkData(0, 2, 2)
+        tdSql.checkData(0, 3, 9)
+
+        tdSql.execute("drop table if exists tb")
+        tdSql.execute("create table tb (ts timestamp, c1 int, c2 int, c3 int)")
+        tdSql.execute("insert into tb values(%d, 1, 2, 3)(%d, null, 4, 5)(%d, 6, null, 7)" % (self.ts, self.ts, self.ts))
+
+        tdSql.query("select * from tb")
+        tdSql.checkRows(1)
+        tdSql.checkData(0, 1, 6)
+        tdSql.checkData(0, 2, 4)
+        tdSql.checkData(0, 3, 7)
 
         
     def stop(self):