diff --git a/usb/usb_standard/src/main/js/test/UsbCoreJsunit.test.js b/usb/usb_standard/src/main/js/test/UsbCoreJsunit.test.js
index 3afd6d855d21d86a3eb3169fe09fba52cbd6dd62..a64ca4a4214bb91ca9a0b280269151777b8d06a5 100644
--- a/usb/usb_standard/src/main/js/test/UsbCoreJsunit.test.js
+++ b/usb/usb_standard/src/main/js/test/UsbCoreJsunit.test.js
@@ -32,6 +32,10 @@ describe('UsbCoreJsFunctionsTest', function () {
     console.info('begin test getversion :' + Version)
     // version > 17  host currentMode = 2 device currentMode = 1
     var usbPortList = usb.getPorts()
+    if (usbPortList == undefined) {
+      portCurrentMode = 1;
+      return
+    }
     gDeviceList = usb.getDevices();
     if (usbPortList.length > 0) {
       console.info('usb case gDeviceList.length return: ' + gDeviceList.length);
diff --git a/usb/usb_standard/src/main/js/test/UsbCoreJsunitEx.test.js b/usb/usb_standard/src/main/js/test/UsbCoreJsunitEx.test.js
index b3cbce15ba8b5fb375b116dbf057562c869456f6..fb7b416826ee295e2cfe85dc56835d469841e319 100644
--- a/usb/usb_standard/src/main/js/test/UsbCoreJsunitEx.test.js
+++ b/usb/usb_standard/src/main/js/test/UsbCoreJsunitEx.test.js
@@ -32,6 +32,10 @@ describe('UsbCoreJsFunctionsTestEx', function () {
     console.info('begin test getversion :' + Version)
     // version > 17  host currentMode = 2 device currentMode = 1
     var usbPortList = usb.getPorts()
+    if (usbPortList == undefined) {
+      portCurrentMode = 1;
+      return
+    }
     gDeviceList = usb.getDevices();
     if (usbPortList.length > 0) {
       if (gDeviceList.length > 0) {
diff --git a/usb/usb_standard/src/main/js/test/UsbDevicePipeJsunit.test.js b/usb/usb_standard/src/main/js/test/UsbDevicePipeJsunit.test.js
index 2e15662a88085fd9267d2221b11db841aac13bc9..10893c7abda10353f617252e6e819280d7bbdf1a 100644
--- a/usb/usb_standard/src/main/js/test/UsbDevicePipeJsunit.test.js
+++ b/usb/usb_standard/src/main/js/test/UsbDevicePipeJsunit.test.js
@@ -33,6 +33,10 @@ describe('UsbDevicePipeJsFunctionsTest', function () {
     console.info('usb unit begin test getversion :' + Version)
     // version > 17  host currentMode = 2 device currentMode = 1
     var usbPortList = usb.getPorts()
+    if (usbPortList == undefined) {
+      portCurrentMode = 1;
+      return
+    }
     gDeviceList = usb.getDevices();
     if (usbPortList.length > 0) {
       if (gDeviceList.length > 0) {
diff --git a/usb/usb_standard/src/main/js/test/UsbDevicePipeJsunitEx.test.js b/usb/usb_standard/src/main/js/test/UsbDevicePipeJsunitEx.test.js
index f2e1807646a8ec46d1ff3e52653d4cdcb58289ae..1e6260afec1398633d345509ce2f8c83e9b6b8f7 100644
--- a/usb/usb_standard/src/main/js/test/UsbDevicePipeJsunitEx.test.js
+++ b/usb/usb_standard/src/main/js/test/UsbDevicePipeJsunitEx.test.js
@@ -33,6 +33,10 @@ describe('UsbDevicePipeJsFunctionsTestEx', function () {
 
     // version > 17  host currentMode = 2 device currentMode = 1
     var usbPortList = usb.getPorts()
+    if (usbPortList == undefined) {
+      portCurrentMode = 1;
+      return
+    }
     gDeviceList = usb.getDevices();
     if (usbPortList.length > 0) {
       if (gDeviceList.length > 0) {