diff --git a/commandor_page.py b/commandor_page.py
index 243e8b8..cbe51c1 100644
--- a/commandor_page.py
+++ b/commandor_page.py
@@ -95,13 +95,12 @@ class CommandorPage:
             self.page = context.new_page()
             # hide webdriver information
             self.page.add_init_script("""() => {
-            Object.defineProperty(navigator,'webdriver',{get: () => undefined});
-            () => {Object.defineProperty(navigator, 'platform', {
-    get: () => {
-        return "iPhone";
-    }
-})};
-            }
+    Object.defineProperty(navigator,'webdriver',{get: () => undefined});
+    Object.defineProperty(navigator, 'platform', {
+        get: () => {
+            return "iPhone";
+        }});
+}
             """)
             # self.page.add_init_script("""""")
             self.page.on("load", self._on_page_loaded)
diff --git a/docs/test.js b/docs/test.js
index 5cf20d7..c77602f 100644
--- a/docs/test.js
+++ b/docs/test.js
@@ -1,11 +1,21 @@
 Object.defineProperty(navigator, 'webdriver', {get: () => undefined});
 Object.defineProperty(navigator, 'platform', {
     get: () => {
-        return "Linux armv7l";
+        return "iPhone";
     }, set: (a) => {
     }
 });
 
+() => {Object.defineProperty(navigator, 'platform', {
+    get: () => {
+        return "iPhone";
+    }
+})}
+
+navigator.__defineGetter__('platform', function(){
+    return 'iPhone' // customized user agent
+});
+
 () => {Object.defineProperty(navigator, 'platform', {
     get: () => {
         return "iPhone";