diff --git a/test/phpunit/AllTests.php b/test/phpunit/AllTests.php
index 27e1b760f6e..d8dda85f2fc 100644
--- a/test/phpunit/AllTests.php
+++ b/test/phpunit/AllTests.php
@@ -75,6 +75,8 @@ class AllTests
 		$suite->addTestSuite('MarginsLibTest');
 		require_once dirname(__FILE__).'/FilesLibTest.php';
 		$suite->addTestSuite('FilesLibTest');
+		require_once dirname(__FILE__).'/JsonLibTest.php';
+		$suite->addTestSuite('JsonLibTest');
 		require_once dirname(__FILE__).'/ImagesLibTest.php';
 		$suite->addTestSuite('ImagesLibTest');
 		require_once dirname(__FILE__).'/FunctionsLibTest.php';
diff --git a/test/phpunit/JsonLibTest.php b/test/phpunit/JsonLibTest.php
new file mode 100755
index 00000000000..67485c118e2
--- /dev/null
+++ b/test/phpunit/JsonLibTest.php
@@ -0,0 +1,119 @@
+<?php
+/* Copyright (C) 2010-2012 Laurent Destailleur  <eldy@users.sourceforge.net>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ * or see http://www.gnu.org/
+ */
+
+/**
+ *      \file       test/phpunit/JsonLibTest.php
+ *		\ingroup    test
+ *      \brief      PHPUnit test
+ *		\remarks	To run this script as CLI:  phpunit filename.php
+ */
+
+global $conf,$user,$langs,$db;
+//define('TEST_DB_FORCE_TYPE','mysql');	// This is to force using mysql driver
+//require_once 'PHPUnit/Autoload.php';
+require_once dirname(__FILE__).'/../../htdocs/master.inc.php';
+require_once dirname(__FILE__).'/../../htdocs/core/lib/json.lib.php';
+
+if (! defined('NOREQUIREUSER'))  define('NOREQUIREUSER','1');
+if (! defined('NOREQUIREDB'))    define('NOREQUIREDB','1');
+if (! defined('NOREQUIRESOC'))   define('NOREQUIRESOC','1');
+if (! defined('NOREQUIRETRAN'))  define('NOREQUIRETRAN','1');
+if (! defined('NOCSRFCHECK'))    define('NOCSRFCHECK','1');
+if (! defined('NOTOKENRENEWAL')) define('NOTOKENRENEWAL','1');
+if (! defined('NOREQUIREMENU'))  define('NOREQUIREMENU','1'); // If there is no menu to show
+if (! defined('NOREQUIREHTML'))  define('NOREQUIREHTML','1'); // If we don't need to load the html.form.class.php
+if (! defined('NOREQUIREAJAX'))  define('NOREQUIREAJAX','1');
+if (! defined("NOLOGIN"))        define("NOLOGIN",'1');       // If this page is public (can be called outside logged session)
+
+
+/**
+ * Class for PHPUnit tests
+ *
+ * @backupGlobals disabled
+ * @backupStaticAttributes enabled
+ * @remarks	backupGlobals must be disabled to have db,conf,user and lang not erased.
+ */
+class JsonLibTest extends PHPUnit_Framework_TestCase
+{
+    protected $savconf;
+    protected $savuser;
+    protected $savlangs;
+    protected $savdb;
+
+    /**
+     * Constructor
+     * We save global variables into local variables
+     *
+     * @return CoreTest
+     */
+    function __construct()
+    {
+        //$this->sharedFixture
+        global $conf,$user,$langs,$db;
+        $this->savconf=$conf;
+        $this->savuser=$user;
+        $this->savlangs=$langs;
+        $this->savdb=$db;
+
+        print __METHOD__." db->type=".$db->type." user->id=".$user->id;
+        //print " - db ".$db->db;
+        print "\n";
+    }
+
+    // Static methods
+    public static function setUpBeforeClass()
+    {
+        global $conf,$user,$langs,$db;
+        //$db->begin();	// This is to have all actions inside a transaction even if test launched without suite.
+
+        print __METHOD__."\n";
+    }
+    public static function tearDownAfterClass()
+    {
+        global $conf,$user,$langs,$db;
+        //$db->rollback();
+
+        print __METHOD__."\n";
+    }
+
+	/**
+	 * Init phpunit tests
+	 *
+	 * @return	void
+	 */
+    protected function setUp()
+    {
+        global $conf,$user,$langs,$db;
+        $conf=$this->savconf;
+        $user=$this->savuser;
+        $langs=$this->savlangs;
+        $db=$this->savdb;
+
+        print __METHOD__."\n";
+    }
+	/**
+	 * End phpunit tests
+	 *
+	 * @return	void
+	 */
+    protected function tearDown()
+    {
+        print __METHOD__."\n";
+    }
+
+}