diff --git a/tests/system-test/2-query/last_cache_scan.py b/tests/system-test/2-query/last_cache_scan.py
index 9b6dca56fd..8e8ac837e7 100644
--- a/tests/system-test/2-query/last_cache_scan.py
+++ b/tests/system-test/2-query/last_cache_scan.py
@@ -394,7 +394,7 @@ class TDTestCase:
         tdSql.query('select last(c2), c2, ts from meters', queryTimes=1)
         print(str(tdSql.queryResult))
         tdSql.checkRows(1)
-        tdSql.checkCols(3)
+        tdSql.checkCols(5)
         tdSql.checkData(0, 0, None)
         tdSql.checkData(0, 1, None)