diff --git a/tests/pytest/alter/alter_table.py b/tests/pytest/alter/alter_table.py
index f1d1da2990..2982492f65 100644
--- a/tests/pytest/alter/alter_table.py
+++ b/tests/pytest/alter/alter_table.py
@@ -131,7 +131,7 @@ class TDTestCase:
         tdSql.execute("alter table t0 set tag t1=2.1")
 
         tdSql.query("show tables")
-        tdSql.checkRows(1)
+        tdSql.checkRows(2)
         
     def stop(self):
         tdSql.close()
diff --git a/tests/pytest/fulltest.sh b/tests/pytest/fulltest.sh
index cb233f85b8..d9bc185b6c 100755
--- a/tests/pytest/fulltest.sh
+++ b/tests/pytest/fulltest.sh
@@ -190,6 +190,7 @@ python3 ./test.py -f stream/table_n.py
 
 #alter table
 python3 ./test.py -f alter/alter_table_crash.py
+python3 ./test.py -f alter/alter_table.py
 
 # client
 python3 ./test.py -f client/client.py
diff --git a/tests/pytest/query/query.py b/tests/pytest/query/query.py
index d0750ac4a5..756aa0eda9 100644
--- a/tests/pytest/query/query.py
+++ b/tests/pytest/query/query.py
@@ -23,6 +23,8 @@ class TDTestCase:
         tdLog.debug("start to execute %s" % __file__)
         tdSql.init(conn.cursor(), logSql)
 
+        self.ts = 1538548685000
+
     def run(self):
         tdSql.prepare()
 
@@ -77,7 +79,37 @@ class TDTestCase:
         tdSql.checkRows(1)
         tdSql.checkData(0, 0, 1)
 
+        ## test case for https://jira.taosdata.com:18080/browse/TD-1930
+        tdSql.execute("create table tb(ts timestamp, c1 int, c2 binary(10), c3 nchar(10), c4 float, c5 bool)")
+        for i in range(10):
+            tdSql.execute("insert into tb values(%d, %d, 'binary%d', 'nchar%d', %f, %d)" % (self.ts + i, i, i, i, i + 0.1, i % 2))
+        
+        tdSql.error("select * from tb where c2 = binary2")
+        tdSql.error("select * from tb where c3 = nchar2")
 
+        tdSql.query("select * from tb where c2 = 'binary2' ")
+        tdSql.checkRows(1)
+
+        tdSql.query("select * from tb where c3 = 'nchar2' ")
+        tdSql.checkRows(1)
+
+        tdSql.query("select * from tb where c1 = '2' ")
+        tdSql.checkRows(1)
+
+        tdSql.query("select * from tb where c1 = 2 ")
+        tdSql.checkRows(1)
+
+        tdSql.query("select * from tb where c4 = '0.1' ")
+        tdSql.checkRows(1)
+
+        tdSql.query("select * from tb where c4 = 0.1 ")
+        tdSql.checkRows(1)
+
+        tdSql.query("select * from tb where c5 = true ")
+        tdSql.checkRows(5)
+
+        tdSql.query("select * from tb where c5 = 'true' ")
+        tdSql.checkRows(5)
 
     def stop(self):
         tdSql.close()
diff --git a/tests/pytest/table/create.py b/tests/pytest/table/create.py
index a0991d674a..ecd4d01141 100644
--- a/tests/pytest/table/create.py
+++ b/tests/pytest/table/create.py
@@ -56,6 +56,12 @@ class TDTestCase:
         tdSql.query("show stables like 'st%' ")
         tdSql.checkRows(3)
         
+        # case for defect: https://jira.taosdata.com:18080/browse/TD-2693
+        tdSql.execute("create database db2")
+        tdSql.execute("use db2")
+        tdSql.execute("create table stb(ts timestamp, c int) tags(t int)")
+        tdSql.error("insert into db2.tb6 using db2.stb tags(1) values(now 1) tb2 using db2. tags( )values(now 2)")
+        
     def stop(self):
         tdSql.close()
         tdLog.success("%s successfully executed" % __file__)