diff --git a/tests/system-test/2-query/timezone.py b/tests/system-test/2-query/timezone.py
index 32b27ade65..cc03dac74c 100644
--- a/tests/system-test/2-query/timezone.py
+++ b/tests/system-test/2-query/timezone.py
@@ -74,13 +74,26 @@ class TDTestCase:
         tdSql.checkRows(2)
         tdSql.query("select timezone()+1 from ntb")
         tdSql.checkRows(2)
+        tdSql.query("select timezone()+1 from db.ntb")
+        tdSql.checkRows(2)
+        tdSql.query("select timezone()+1 from stb")
+        tdSql.checkRows(2)
+        tdSql.query("select timezone()+1 from db.stb")
+        tdSql.checkRows(2)
+        tdSql.query("select timezone()+1 from stb_1")
+        tdSql.checkRows(2)
+        tdSql.query("select timezone()+1 from db.stb_1")
+        tdSql.checkRows(2)
         tdSql.query("select timezone()+1.5 from ntb")
         tdSql.checkRows(2)
+        tdSql.query("select timezone()+1.5 from db.ntb")
+        tdSql.checkRows(2)
         tdSql.query("select timezone()-100 from ntb")
         tdSql.checkRows(2)
         tdSql.query("select timezone()*100 from ntb")
         tdSql.checkRows(2)
         tdSql.query("select timezone()/10 from ntb")
+        tdSql.query("select timezone()/0 from ntb")
 
 
         tdSql.query("select timezone()+null from ntb")