diff --git a/tests/system-test/8-stream/at_once_session.py b/tests/system-test/8-stream/at_once_session.py
index 7a51ad245f..9c53d81fc5 100644
--- a/tests/system-test/8-stream/at_once_session.py
+++ b/tests/system-test/8-stream/at_once_session.py
@@ -203,7 +203,7 @@ class TDTestCase:
                         tdSql.query(f'select count(*) from `{tbname}`')
                         ptn_counter += 1
 
-                    tdSql.checkEqual(tdSql.queryResult[0][0] > 0, True)
+                    tdSql.checkEqual(tdSql.queryResult[0][0] > 0, True) if subtable is not None else tdSql.checkEqual(tdSql.queryResult[0][0] >= 0, True)