diff --git a/test/addons/async-hello-world/binding.cc b/test/addons/async-hello-world/binding.cc
index 2f77aee52ab2d9..1d8a4d791cf276 100644
--- a/test/addons/async-hello-world/binding.cc
+++ b/test/addons/async-hello-world/binding.cc
@@ -2,13 +2,6 @@
 #include <v8.h>
 #include <uv.h>
 
-#if defined _WIN32
-#include <windows.h>
-#else
-#include <unistd.h>
-#endif
-
-
 struct async_req {
   uv_work_t req;
   int input;
@@ -21,11 +14,7 @@ struct async_req {
 void DoAsync(uv_work_t* r) {
   async_req* req = reinterpret_cast<async_req*>(r->data);
   // Simulate CPU intensive process...
-#if defined _WIN32
-  Sleep(1000);
-#else
-  sleep(1);
-#endif
+  uv_sleep(1000);
   req->output = req->input * 2;
 }
 
diff --git a/test/node-api/test_async/test_async.c b/test/node-api/test_async/test_async.c
index 650cf2d6241643..f4faa3d81b0326 100644
--- a/test/node-api/test_async/test_async.c
+++ b/test/node-api/test_async/test_async.c
@@ -1,14 +1,9 @@
 #include <assert.h>
 #include <stdio.h>
 #include <node_api.h>
+#include <uv.h>
 #include "../../js-native-api/common.h"
 
-#if defined _WIN32
-#include <windows.h>
-#else
-#include <unistd.h>
-#endif
-
 // this needs to be greater than the thread pool size
 #define MAX_CANCEL_THREADS 6
 
@@ -23,11 +18,7 @@ static carrier the_carrier;
 static carrier async_carrier[MAX_CANCEL_THREADS];
 
 static void Execute(napi_env env, void* data) {
-#if defined _WIN32
-  Sleep(1000);
-#else
-  sleep(1);
-#endif
+  uv_sleep(1000);
   carrier* c = (carrier*)(data);
 
   assert(c == &the_carrier);
@@ -130,11 +121,7 @@ static void CancelComplete(napi_env env, napi_status status, void* data) {
 }
 
 static void CancelExecute(napi_env env, void* data) {
-#if defined _WIN32
-  Sleep(1000);
-#else
-  sleep(1);
-#endif
+  uv_sleep(1000);
 }
 
 static napi_value TestCancel(napi_env env, napi_callback_info info) {