diff --git a/tests/pytest/query/tbname.py b/tests/pytest/query/tbname.py
index 08416ba3ed..30d90b1f9d 100644
--- a/tests/pytest/query/tbname.py
+++ b/tests/pytest/query/tbname.py
@@ -53,6 +53,9 @@ class TDTestCase:
             "select * from cars where id=0 and tbname in ('carzero', 'cartwo')")
         tdSql.checkRows(1)
 
+        tdSql.query("select * from cars where tbname in ('carZero', 'CARONE')")
+        tdSql.checkRows(2)
+
         """
         tdSql.query("select * from cars where tbname like 'car%'")
         tdSql.checkRows(2)
diff --git a/tests/script/general/parser/tbnameIn_query.sim b/tests/script/general/parser/tbnameIn_query.sim
index 65bb89d549..db27886bbf 100644
--- a/tests/script/general/parser/tbnameIn_query.sim
+++ b/tests/script/general/parser/tbnameIn_query.sim
@@ -101,6 +101,30 @@ if $data11 != 2 then
   return -1
 endi
 
+## tbname in can accpet Upper case table name
+sql select count(*) from $stb where tbname in ('ti_tb0', 'TI_tb1', 'TI_TB2') group by t1 order by t1
+if $rows != 3 then
+  return -1
+endi
+if $data00 != 10 then
+  return -1
+endi
+if $data01 != 0 then
+  return -1
+endi
+if $data10 != 10 then
+  return -1
+endi
+if $data11 != 1 then
+  return -1
+endi
+if $data20 != 10 then
+  return -1
+endi
+if $data21 != 2 then
+  return -1
+endi
+
 # multiple tbname in is not allowed NOW
 sql_error select count(*) from $stb where tbname in ('ti_tb1', 'ti_tb300') and tbname in ('ti_tb5', 'ti_tb1000') group by t1 order by t1 asc
 #if $rows != 4 then