diff --git a/be/test/runtime/memory/thread_mem_tracker_mgr_test.cpp b/be/test/runtime/memory/thread_mem_tracker_mgr_test.cpp
index c1feb43fe9..323b2da5df 100644
--- a/be/test/runtime/memory/thread_mem_tracker_mgr_test.cpp
+++ b/be/test/runtime/memory/thread_mem_tracker_mgr_test.cpp
@@ -257,7 +257,7 @@ TEST_F(ThreadMemTrackerMgrTest, ReserveMemory) {
 
     int64_t size1 = 4 * 1024;
     int64_t size2 = 4 * 1024 * 1024;
-    int64_t size3 = size2 * 1024;
+    int64_t size3 = size2 * 2;
 
     thread_context->attach_task(TUniqueId(), t, workload_group);
     thread_context->consume_memory(size1);
@@ -281,7 +281,7 @@ TEST_F(ThreadMemTrackerMgrTest, ReserveMemory) {
     // std::abs(-size1 - size1) < SYNC_PROC_RESERVED_INTERVAL_BYTES, not update process_reserved_memory.
     EXPECT_EQ(doris::GlobalMemoryArbitrator::process_reserved_memory(), size3 - size2);
 
-    thread_context->consume_memory(size2 * 1023);
+    thread_context->consume_memory(size2);
     EXPECT_EQ(t->consumption(), size1 + size2 + size3);
     EXPECT_EQ(doris::GlobalMemoryArbitrator::process_reserved_memory(), size1 + size1);
 
@@ -408,7 +408,7 @@ TEST_F(ThreadMemTrackerMgrTest, NestedSwitchMemTrackerReserveMemory) {
 
     int64_t size1 = 4 * 1024;
     int64_t size2 = 4 * 1024 * 1024;
-    int64_t size3 = size2 * 1024;
+    int64_t size3 = size2 * 2;
 
     thread_context->attach_task(TUniqueId(), t1, workload_group);
     auto st = thread_context->try_reserve_memory(size3);