diff --git a/tests/pytest/query/operator_cost.py b/tests/pytest/query/operator_cost.py
index b94d5fa3b36c6cd55df7b3eac13372fb97b4d48c..774a1e5f42403a6b5f67678e53be5e07beaccde2 100644
--- a/tests/pytest/query/operator_cost.py
+++ b/tests/pytest/query/operator_cost.py
@@ -195,9 +195,6 @@ class TDTestCase:
         sql = '''select distinct(t_tinyint) from stable_1;'''
         tdSql.query(sql)
         tdSql.checkRows(6)
-        sql = '''select distinct(t_binary) from stable_1;'''
-        tdSql.query(sql)
-        tdSql.checkRows(6)
         sql = '''select distinct(t_nchar) from stable_1;'''
         tdSql.query(sql)
         tdSql.checkRows(6)