diff --git a/tests/system-test/2-query/interp.py b/tests/system-test/2-query/interp.py
index 121d4dcff6..a29a521574 100644
--- a/tests/system-test/2-query/interp.py
+++ b/tests/system-test/2-query/interp.py
@@ -4028,13 +4028,13 @@ class TDTestCase:
         tdSql.error(f"select _irowts, _isfilled, interp(c0) from (select * from {dbname}.{ctbname1}) partition by tbname range('2020-02-01 00:00:00', '2020-02-01 00:00:14') every(1s) fill(null)")
 
         tdSql.error(f"select _irowts, _isfilled, interp(c0) from (select * from {dbname}.{ctbname1} union select * from {dbname}.{ctbname2}) range('2020-02-01 00:00:00', '2020-02-01 00:00:14') every(1s) fill(null)")
-        tdSql.error(f"select _irowts, _isfilled, interp(c0) from (select * from {dbname}.{ctbname1} union select * from {dbname}.{ctbname2} order by ts) range('2020-02-01 00:00:00', '2020-02-01 00:00:14') every(1s) fill(null)")
+        tdSql.query(f"select _irowts, _isfilled, interp(c0) from (select * from {dbname}.{ctbname1} union select * from {dbname}.{ctbname2} order by ts) range('2020-02-01 00:00:00', '2020-02-01 00:00:14') every(1s) fill(null)")
 
         tdSql.error(f"select _irowts, _isfilled, interp(c0) from (select * from {dbname}.{ctbname1} union all select * from {dbname}.{ctbname2}) range('2020-02-01 00:00:00', '2020-02-01 00:00:14') every(1s) fill(null)")
-        tdSql.error(f"select _irowts, _isfilled, interp(c0) from (select * from {dbname}.{ctbname1} union all select * from {dbname}.{ctbname2} order by ts) range('2020-02-01 00:00:00', '2020-02-01 00:00:14') every(1s) fill(null)")
+        tdSql.query(f"select _irowts, _isfilled, interp(c0) from (select * from {dbname}.{ctbname1} union all select * from {dbname}.{ctbname2} order by ts) range('2020-02-01 00:00:00', '2020-02-01 00:00:14') every(1s) fill(null)")
 
         tdSql.error(f"select _irowts, _isfilled, interp(c0) from (select * from {dbname}.{ctbname1} union all select * from {dbname}.{ctbname2}) range('2020-02-01 00:00:00', '2020-02-01 00:00:14') every(1s) fill(null)")
-        tdSql.error(f"select _irowts, _isfilled, interp(c0) from (select * from {dbname}.{ctbname1} union all select * from {dbname}.{ctbname2} order by ts) range('2020-02-01 00:00:00', '2020-02-01 00:00:14') every(1s) fill(null)")
+        tdSql.query(f"select _irowts, _isfilled, interp(c0) from (select * from {dbname}.{ctbname1} union all select * from {dbname}.{ctbname2} order by ts) range('2020-02-01 00:00:00', '2020-02-01 00:00:14') every(1s) fill(null)")
 
         tdSql.query(f"select _irowts, _isfilled, interp(c0) from (select {ctbname1}.ts,{ctbname1}.c0 from {dbname}.{ctbname1}, {dbname}.{ctbname2} where {ctbname1}.ts = {ctbname2}.ts) range('2020-02-01 00:00:00', '2020-02-01 00:00:14') every(1s) fill(null)")