diff --git a/tests/script/general/parser/function.sim b/tests/script/general/parser/function.sim
index 56ce15c36f..ee5a750c88 100644
--- a/tests/script/general/parser/function.sim
+++ b/tests/script/general/parser/function.sim
@@ -24,6 +24,9 @@ sql drop database if exists $db
 sql create database $db keep 36500
 sql use $db
 
+print =====================================> td-4481
+sql create database $db
+
 print =====================================> test case for twa in single block
 
 sql create table t1 (ts timestamp, k float);
diff --git a/tests/script/general/parser/nestquery.sim b/tests/script/general/parser/nestquery.sim
index 9e2736833f..3d13ff504d 100644
--- a/tests/script/general/parser/nestquery.sim
+++ b/tests/script/general/parser/nestquery.sim
@@ -9,7 +9,7 @@ sql connect
 
 print ======================== dnode1 start
 
-$dbPrefix = nest_query
+$dbPrefix = nest_db
 $tbPrefix = nest_tb
 $mtPrefix = nest_mt
 $tbNum = 10
@@ -17,7 +17,6 @@ $rowNum = 10000
 $totalNum = $tbNum * $rowNum
 
 print =============== nestquery.sim
-
 $i = 0
 $db = $dbPrefix . $i
 $mt = $mtPrefix . $i
diff --git a/tests/script/general/parser/testSuite.sim b/tests/script/general/parser/testSuite.sim
index afb76c799e..6265fc3a02 100644
--- a/tests/script/general/parser/testSuite.sim
+++ b/tests/script/general/parser/testSuite.sim
@@ -60,4 +60,5 @@ run general/parser/slimit_alter_tags.sim
 run general/parser/binary_escapeCharacter.sim
 run general/parser/between_and.sim
 run general/parser/last_cache.sim
+run general/parser/nestquery.sim