diff --git a/code/base/test_base.cpp b/code/base/test_base.cpp
index 60214fd..bfddb4a 100644
--- a/code/base/test_base.cpp
+++ b/code/base/test_base.cpp
@@ -131,9 +131,17 @@ class test
 	/*设置序列号*/
 	int test_set_serial_num(void* data)
 	{
-		int ret = SCANNER_ERR_OK;
+		wchar_t* sn = (wchar_t*)data;
+	
 		std::string set_sn = (char*)data,
 			get_sn;
+		int ret = SCANNER_ERR_OK;
+		size_t len = 0;
+		ret = str_to_wchar(set_sn, sn, &len);
+		if (ret == ERROR_INSUFFICIENT_BUFFER)
+		{
+			ret = str_to_wchar(set_sn, sn, &len);
+		}
 		unsigned int setlen = set_sn.size(),
 			getlen = 0;