diff --git a/spec/fixtures/api/beforeunload-false.html b/spec/fixtures/api/beforeunload-false.html
index 06a2ecf804e..b5a04781103 100644
--- a/spec/fixtures/api/beforeunload-false.html
+++ b/spec/fixtures/api/beforeunload-false.html
@@ -2,9 +2,9 @@
 <body>
 <script type="text/javascript" charset="utf-8">
   window.onbeforeunload = function() {
-    setImmediate(function() {
+    setTimeout(function() {
       require('remote').getCurrentWindow().emit('onbeforeunload');
-    });
+    }, 0);
     return false;
   }
 </script>
diff --git a/spec/fixtures/api/close-beforeunload-false.html b/spec/fixtures/api/close-beforeunload-false.html
index d8e4f1f5817..a3c40287df1 100644
--- a/spec/fixtures/api/close-beforeunload-false.html
+++ b/spec/fixtures/api/close-beforeunload-false.html
@@ -2,9 +2,9 @@
 <body>
 <script type="text/javascript" charset="utf-8">
   window.onbeforeunload = function() {
-    setImmediate(function() {
+    setTimeout(function() {
       require('remote').getCurrentWindow().emit('onbeforeunload');
-    });
+    }, 0);
     return false;
   }
   window.close();
diff --git a/spec/fixtures/api/close-beforeunload-string.html b/spec/fixtures/api/close-beforeunload-string.html
index c4fc0baa592..aae08a3560a 100644
--- a/spec/fixtures/api/close-beforeunload-string.html
+++ b/spec/fixtures/api/close-beforeunload-string.html
@@ -2,9 +2,9 @@
 <body>
 <script type="text/javascript" charset="utf-8">
   window.onbeforeunload = function() {
-    setImmediate(function() {
+    setTimeout(function() {
       require('remote').getCurrentWindow().emit('onbeforeunload');
-    });
+    }, 0);
     return 'string';
   }
   window.close();
diff --git a/spec/fixtures/api/close-beforeunload-true.html b/spec/fixtures/api/close-beforeunload-true.html
index 667afbb3d3d..0a550b4258f 100644
--- a/spec/fixtures/api/close-beforeunload-true.html
+++ b/spec/fixtures/api/close-beforeunload-true.html
@@ -2,9 +2,9 @@
 <body>
 <script type="text/javascript" charset="utf-8">
   window.onbeforeunload = function() {
-    setImmediate(function() {
+    setTimeout(function() {
       require('remote').getCurrentWindow().emit('onbeforeunload');
-    });
+    }, 0);
     return true;
   }
   window.close();
