diff --git a/tests/system-test/1-insert/alter_stable.py b/tests/system-test/1-insert/alter_stable.py
index c92efb403c..cd64e3ddfe 100644
--- a/tests/system-test/1-insert/alter_stable.py
+++ b/tests/system-test/1-insert/alter_stable.py
@@ -77,6 +77,7 @@ class TDTestCase:
         tdSql.error(f'alter stable {stbname} modify column c9 double')
         tdSql.error(f'alter stable {stbname} modify column c10 float')
         tdSql.error(f'alter stable {stbname} modify column c11 int')
+        tdSql.error(f'alter stable {stbname} drop tag t0')
         tdSql.execute(f'drop database {dbname}')
 
     def alter_stable_tag_check(self,dbname,stbname,tbname):
@@ -126,6 +127,11 @@ class TDTestCase:
         for i in ['int','unsigned int','float','binary(10)','nchar(10)']:
             tdSql.error(f'alter stable {stbname} modify tag t8 {i}')
         tdSql.error(f'alter stable {stbname} modify tag t4 int')
+        tdSql.error(f'alter stable {stbname} drop column t0')
+        #!bug TD-16410
+        # tdSql.error(f'alter stable {tbname} set tag t1=100 ')
+        # tdSql.execute(f'create table ntb (ts timestamp,c0 int)')
+        tdSql.error(f'alter stable ntb add column c2 ')
         tdSql.execute(f'drop database {dbname}')
 
     def run(self):
diff --git a/tests/system-test/1-insert/alter_table.py b/tests/system-test/1-insert/alter_table.py
index 3c0def86e4..ec3e771cbd 100644
--- a/tests/system-test/1-insert/alter_table.py
+++ b/tests/system-test/1-insert/alter_table.py
@@ -125,6 +125,22 @@ class TDTestCase:
         tdSql.execute(f'alter table {dbname}.{tbname} drop column `c15`')
         tdSql.query(f'describe {dbname}.{tbname}')
         tdSql.checkRows(14)
+        #! TD-16422
+        # tdSql.execute(f'alter table {dbname}.{tbname} add column c16 binary(10)')
+        # tdSql.query(f'describe {dbname}.{tbname}')
+        # tdSql.checkRows(15)
+        # print(tdSql.queryResult)
+        # tdSql.checkEqual(tdSql.queryResult[14][2],10)
+        # tdSql.execute(f'alter table {dbname}.{tbname} drop column c16')
+
+        # tdSql.execute(f'alter table {dbname}.{tbname} add column c16 nchar(10)')
+        # tdSql.query(f'describe {dbname}.{tbname}')
+        # tdSql.checkRows(15)
+        # print(tdSql.queryResult)
+        # tdSql.checkEqual(tdSql.queryResult[14][2],10)
+        # tdSql.execute(f'alter table {dbname}.{tbname} drop column c16')
+
+
         tdSql.execute(f'alter table {dbname}.{tbname} modify column c12 binary(30)')
         tdSql.query(f'describe {dbname}.{tbname}')
         tdSql.checkData(12,2,30)
@@ -164,6 +180,9 @@ class TDTestCase:
         tdSql.error(f'alter table {dbname}.{tbname} modify column c10 float')
         tdSql.error(f'alter table {dbname}.{tbname} modify column c1 bool')
         tdSql.error(f'alter table {dbname}.{tbname} modify column c1 binary(10)')
+
+
+
         tdSql.execute(f'drop database {dbname}')
     def alter_stb_column_check(self):
         dbname = self.get_long_name(length=10, mode="letters")