diff --git a/test/phpunit/InventoryTest.php b/test/phpunit/InventoryTest.php
index 1d125a0311c..ad2b19aebd3 100644
--- a/test/phpunit/InventoryTest.php
+++ b/test/phpunit/InventoryTest.php
@@ -79,7 +79,7 @@ class InventoryTest extends PHPUnit\Framework\TestCase
 	 *
 	 * @return void
 	 */
-	public static function setUpBeforeClass():void
+	public static function setUpBeforeClass()
 	{
 		global $conf,$user,$langs,$db;
 
@@ -93,7 +93,7 @@ class InventoryTest extends PHPUnit\Framework\TestCase
 	 *
 	 * @return	void
 	 */
-	public static function tearDownAfterClass():void
+	public static function tearDownAfterClass()
 	{
 		global $conf,$user,$langs,$db;
 		$db->rollback();
@@ -106,7 +106,7 @@ class InventoryTest extends PHPUnit\Framework\TestCase
 	 *
 	 * @return  void
 	 */
-	protected function setUp():void
+	protected function setUp()
 	{
 		global $conf,$user,$langs,$db;
 		$conf=$this->savconf;
@@ -122,7 +122,7 @@ class InventoryTest extends PHPUnit\Framework\TestCase
 	 *
 	 * @return  void
 	 */
-	protected function tearDown():void
+	protected function tearDown()
 	{
 		print __METHOD__."\n";
 	}