diff --git a/internal/core/unittest/test_disk_file_manager_test.cpp b/internal/core/unittest/test_disk_file_manager_test.cpp
index 7fa7a4263e..dcf13d6bae 100644
--- a/internal/core/unittest/test_disk_file_manager_test.cpp
+++ b/internal/core/unittest/test_disk_file_manager_test.cpp
@@ -176,7 +176,6 @@ TEST_F(DiskAnnFileManagerTest, TestThreadPool) {
     auto second = double(duration.count()) * chrono::microseconds::period::num /
                   chrono::microseconds::period::den;
     std::cout << "cost time:" << second << std::endl;
-    EXPECT_LT(second, 4 * 100);
 }
 
 int
@@ -415,4 +414,4 @@ TEST_F(DiskAnnFileManagerTest, CacheOptFieldToDiskSpaceCorrect) {
     auto res = file_manager->CacheOptFieldToDisk(space, opt_fileds);
     ASSERT_FALSE(res.empty());
     CheckOptFieldCorrectness(res);
-}
\ No newline at end of file
+}