diff --git a/README.md b/README.md
index 4a24c14..8751fe5 100644
--- a/README.md
+++ b/README.md
@@ -35,8 +35,26 @@ The __FACEBOOK_USER_TOKEN__ is generated via the graph explorer page
 https://developers.facebook.com/tools/explorer/  using an user that is said to 
 be over 18 of age to support crawling of all types of pages.
 
-
-
-
+#### Crawling with test users ####
+
+Extracts all the access tokens of your test users with **testuser.php** script:
+```Shell
+$ php testuser.php 
+Write access token of test user #1 into TOKEN.1
+Write access token of test user #2 into TOKEN.2
+Write access token of test user #3 into TOKEN.3
+Write access token of test user #4 into TOKEN.4
+```
+
+Check extracted tokens:
+```Shell
+$ ls TOKEN.*
+TOKEN.1  TOKEN.2  TOKEN.3  TOKEN.4
+```
+
+launch the crawler with the token files:
+```Shell
+$ php agent.php token_file\=TOKEN.1
+```
 
 ***Happy crawling!!***
diff --git a/agent.php b/agent.php
index b60008c..c2bf120 100644
--- a/agent.php
+++ b/agent.php
@@ -21,8 +21,14 @@
 
 //Parse command line arguments as GET variables
 parse_str(implode('&', array_slice($argv, 1)), $_GET);
+
+if(!isset($_GET['token_file'])) 
+  $tokenFile = dirname($_SERVER['SCRIPT_FILENAME'])."/TOKEN";
+else
+  $tokenFile = $_GET['token_file'];
+
 if(!isset($_GET['token']))
-  print "No token provided, will try to read from the file: ".dirname($_SERVER['SCRIPT_FILENAME']) . "/TOKEN instead.".PHP_EOL;
+  print "No token provided, will try to read from the file: ".$tokenFile." instead.".PHP_EOL;
 else
   $token['access_token'] = $_GET['token'];
 renewAccessToken();
@@ -252,8 +258,7 @@ function crawl($currentPost, $facebook) {
 }
 
 function renewAccessToken() {
-  GLOBAL $facebook, $token;
-  $tokenFile = dirname($_SERVER['SCRIPT_FILENAME']) . "/TOKEN";
+  GLOBAL $facebook, $token, $tokenFile;
   if(file_exists($tokenFile)) {
     $file = fopen($tokenFile, "r+");
     $token['access_token'] = fgets($file);
diff --git a/testuser.php b/testuser.php
new file mode 100644
index 0000000..1821965
--- /dev/null
+++ b/testuser.php
@@ -0,0 +1,22 @@
+<?php
+// Get test users' access tokens of the app
+require_once "./config/config.php";
+require_once "./facebook-php/src/facebook.php";
+
+$facebook = new Facebook(array(
+    'appId' => APPID,
+    'secret' => APPSEC,
+));
+
+$access_token = $facebook->getAccessToken();
+$accounts = $facebook->api("/".APPID."/accounts/test-users?access_token=$access_token");
+
+$id=1;
+foreach($accounts['data'] as $account) {
+  $filename="TOKEN.$id";
+  print "Write access token of test user #$id into $filename\n";
+  file_put_contents($filename, $account['access_token']);
+  $id++;
+}
+
+?>