diff --git a/tests/ut/python/parallel/test_loop_two_matmul.py b/tests/ut/python/parallel/test_loop_two_matmul.py
index 8cf87bd812..41300c164d 100644
--- a/tests/ut/python/parallel/test_loop_two_matmul.py
+++ b/tests/ut/python/parallel/test_loop_two_matmul.py
@@ -49,7 +49,7 @@ def loop_config(size):
     config_list = []
     num = 1
     split_list = [num]
-    for i in range(int(math.log2(size))):
+    for _ in range(int(math.log2(size))):
         num = num * 2
         split_list.append(num)