diff --git a/test/unittest/platform/common/uart_test.c b/test/unittest/platform/common/uart_test.c
index 7700323b391a536313c3f2905474b41f38d65e3e..d926be92d5f2563d8089e9f184cccf1176d99fa8 100644
--- a/test/unittest/platform/common/uart_test.c
+++ b/test/unittest/platform/common/uart_test.c
@@ -35,10 +35,12 @@ static int32_t UartWriteTest(struct UartTest *test)
 
 static int32_t UartReadTest(struct UartTest *test)
 {
+#ifdef __LITEOS__	
     if (UartSetTransMode(test->handle, UART_MODE_RD_NONBLOCK) != HDF_SUCCESS) {
         HDF_LOGE("%s: error", __func__);
         return HDF_FAILURE;
-    } 
+    }
+#endif
     if (UartRead(test->handle, test->rbuf, test->len) != 0) {
         HDF_LOGE("%s: error", __func__);
         return HDF_FAILURE;