diff --git a/kernel_lite/ipc_posix/shared_memory/ShmTest.cpp b/kernel_lite/ipc_posix/shared_memory/ShmTest.cpp
index f389f0c72e0162bd59adde8713f3f6956fd92f6d..c959d8de12eb03d1f452bbca29cf2bb2cda8845f 100755
--- a/kernel_lite/ipc_posix/shared_memory/ShmTest.cpp
+++ b/kernel_lite/ipc_posix/shared_memory/ShmTest.cpp
@@ -206,7 +206,7 @@ HWTEST_F(ShmTest, testShmatSHM_REMAP, Function | MediumTest | Level1)
     ASSERT_NE(shared, (void*)-1) << "> parent: shmat 2 : errno = " << errno;
     strncpy(shared, SHM_TEST_STR, SHM_TEST_STR_LEN);
     ASSERT_NE(shmdt(shared), -1) << "> parent: shmdt 2 : errno = " << errno;
-    Msleep(20);
+    Msleep(50);
     ASSERT_NE(shmctl(shmid, IPC_RMID, nullptr), -1) << "> parent: shmctl : errno = " << errno;
 
     Msleep(50);