diff --git a/setup/itopdesignformat.class.inc.php b/setup/itopdesignformat.class.inc.php
index d4cdb8874..bd0783081 100644
--- a/setup/itopdesignformat.class.inc.php
+++ b/setup/itopdesignformat.class.inc.php
@@ -1,5 +1,5 @@
 <?php
-// Copyright (C) 2014-2017 Combodo SARL
+// Copyright (C) 2014-2019 Combodo SARL
 //
 //   This file is part of iTop.
 //
@@ -16,10 +16,14 @@
 //   You should have received a copy of the GNU Affero General Public License
 //   along with iTop. If not, see <http://www.gnu.org/licenses/>
 
+define('ITOP_DESIGN_LATEST_VERSION', '1.7'); // iTop >= 2.7.0
+
 /**
  * Utility to upgrade the format of a given XML datamodel to the latest version
  * The datamodel is supplied as a loaded DOMDocument and modified in-place.
- * 
+ *
+ * To test migration methods check {@link \Combodo\iTop\Test\UnitTest\Setup\TestForITopDesignFormatClass}
+ *
  * Usage:
  * 
  * $oDocument = new DOMDocument();
@@ -34,9 +38,6 @@
  *     echo "Error, failed to upgrade the format, reason(s):\n".implode("\n", $oFormat->GetErrors());
  * }
  */
-
-define('ITOP_DESIGN_LATEST_VERSION', '1.7'); // iTop >= 2.7.0
- 
 class iTopDesignFormat
 {
 	protected static $aVersions = array(
diff --git a/test/setup/iTopDesignFormat/1.7_to_1.6.expected.xml b/test/setup/iTopDesignFormat/1.7_to_1.6.expected.xml
new file mode 100644
index 000000000..280019cad
--- /dev/null
+++ b/test/setup/iTopDesignFormat/1.7_to_1.6.expected.xml
@@ -0,0 +1,15 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<itop_design xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" version="1.6">
+  <menus>
+    <menu id="WelcomeMenuLink1" xsi:type="WebPageMenuNode" _delta="define">
+      <rank>100</rank>
+      <parent>WelcomeMenu</parent>
+      <url>$$http://fr.wikipedia.org/</url>
+    </menu>
+    <menu id="WelcomeMenuLink2" xsi:type="WebPageMenuNode" _delta="define">
+      <rank>100</rank>
+      <parent>WelcomeMenu</parent>
+      <url>$$http://fr.wikipedia.org/</url>
+    </menu>
+  </menus>
+</itop_design>
diff --git a/test/setup/iTopDesignFormat/1.7_to_1.6.input.xml b/test/setup/iTopDesignFormat/1.7_to_1.6.input.xml
new file mode 100644
index 000000000..ec041ae93
--- /dev/null
+++ b/test/setup/iTopDesignFormat/1.7_to_1.6.input.xml
@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<itop_design xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" version="1.7">
+	<menus>
+		<menu id="WelcomeMenuLink1" xsi:type="WebPageMenuNode" _delta="define">
+			<rank>100</rank>
+			<parent>WelcomeMenu</parent>
+			<url>$$http://fr.wikipedia.org/</url>
+			<in_new_window>true</in_new_window>
+		</menu>
+		<menu id="WelcomeMenuLink2" xsi:type="WebPageMenuNode" _delta="define">
+			<rank>100</rank>
+			<parent>WelcomeMenu</parent>
+			<url>$$http://fr.wikipedia.org/</url>
+		</menu>
+	</menus>
+</itop_design>
diff --git a/test/setup/iTopDesignFormat/iTopDesignFormatTest.php b/test/setup/iTopDesignFormat/iTopDesignFormatTest.php
new file mode 100644
index 000000000..cabfbba24
--- /dev/null
+++ b/test/setup/iTopDesignFormat/iTopDesignFormatTest.php
@@ -0,0 +1,73 @@
+<?php
+
+namespace Combodo\iTop\Test\UnitTest\Setup;
+
+use Combodo\iTop\Test\UnitTest\ItopTestCase;
+use DOMDocument;
+use iTopDesignFormat;
+
+
+/**
+ * Class iTopDesignFormatTest
+ *
+ * @runTestsInSeparateProcesses
+ * @preserveGlobalState disabled
+ * @backupGlobals disabled
+ *
+ * @covers iTopDesignFormat
+ *
+ * @since 2.7.0 N°2586
+ * @package Combodo\iTop\Test\UnitTest\Setup
+ */
+class TestForITopDesignFormatClass extends ItopTestCase
+{
+	protected function setUp()
+	{
+		parent::setUp();
+
+		require_once APPROOT.'setup/modelfactory.class.inc.php';
+		require_once APPROOT.'setup/itopdesignformat.class.inc.php';
+	}
+
+	/**
+	 * @covers       iTopDesignFormat::Convert
+	 * @dataProvider testMigrationMethodProvider
+	 *
+	 * @param string $sTargetVersion
+	 * @param string $sInputXmlFileName example "1.7_to_1.6.input"
+	 * @param string $sExpectedXmlFileName example "1.7_to_1.6.expected"
+	 *
+	 * @throws \Exception
+	 */
+	public function testMigrationMethod($sTargetVersion, $sInputXmlFileName, $sExpectedXmlFileName)
+	{
+		$sInputXml = $this->GetFileContent($sInputXmlFileName);
+		$sExpectedXml = $this->GetFileContent($sExpectedXmlFileName);
+
+		$oInputDocument = new DOMDocument();
+		libxml_clear_errors();
+		$oInputDocument->preserveWhiteSpace = false;
+		$oInputDocument->loadXML($sInputXml);
+		$oInputDocument->formatOutput = true;
+		$oDesignFormat = new iTopDesignFormat($oInputDocument);
+		$oDesignFormat->Convert($sTargetVersion);
+
+		$sConvertedXml = $oInputDocument->saveXML();
+
+		$this->assertEquals($sExpectedXml, $sConvertedXml);
+	}
+
+	private function GetFileContent($sFileName)
+	{
+		$sCurrentPath = __DIR__;
+
+		return file_get_contents($sCurrentPath.DIRECTORY_SEPARATOR.$sFileName.'.xml');
+	}
+
+	public function testMigrationMethodProvider()
+	{
+		return array(
+			'1.7 to 1.6' => array('1.6', '1.7_to_1.6.input', '1.7_to_1.6.expected'),
+		);
+	}
+}
\ No newline at end of file