diff --git a/packaging/tools/make_install.sh b/packaging/tools/make_install.sh
old mode 100644
new mode 100755
diff --git a/tests/pytest/query/unionAllTest.py b/tests/pytest/query/unionAllTest.py
index 3064e2f63e871e5c90d03d19bf125447714dd6cb..cbff89fd9576b984887c832a51d47a577e89bea4 100644
--- a/tests/pytest/query/unionAllTest.py
+++ b/tests/pytest/query/unionAllTest.py
@@ -24,7 +24,7 @@ class TDTestCase:
         tdLog.debug("start to execute %s" % __file__)
         tdSql.init(conn.cursor(), logSql)
 
-        self.ts = 1500000000000
+        self.ts = 1600000000000
         self.num = 10
 
     def run(self):
@@ -84,6 +84,26 @@ class TDTestCase:
         tdSql.query("select 'dcs' as options from stb where col > 200 limit 1 union all select 'aaa' as options from stb limit 10")
         tdSql.checkData(0, 0, 'aaa')
 
+        # https://jira.taosdata.com:18080/browse/TS-444
+        tdLog.info("test case for TS-444")
+
+        tdSql.query("select count(*) as count, loc from st where ts between 1600000000000 and 1600000000010 group by loc")
+        tdSql.checkRows(6)
+
+        tdSql.query("select count(*) as count, loc from st where ts between 1600000000020 and 1600000000030 group by loc")
+        tdSql.checkRows(0)
+
+        tdSql.query(''' select count(*) as count, loc from st where ts between 1600000000000 and 1600000000010 group by loc
+                    union all
+                    select count(*) as count, loc from st where ts between 1600000000020 and 1600000000030 group by loc''')
+        tdSql.checkRows(6)
+
+        tdSql.query(''' select count(*) as count, loc from st where ts between 1600000000020 and 1600000000030 group by loc
+                    union all
+                    select count(*) as count, loc from st where ts between 1600000000000 and 1600000000010 group by loc''')
+        tdSql.checkRows(6)
+
+
     def stop(self):
         tdSql.close()
         tdLog.success("%s successfully executed" % __file__)