diff --git a/application/utils.inc.php b/application/utils.inc.php
index 3afd936ed..439b565f3 100644
--- a/application/utils.inc.php
+++ b/application/utils.inc.php
@@ -2745,12 +2745,18 @@ HTML;
 					$bSkipped = true;
 				}
 				else {
-					foreach ($aExcludedPath as $sExcludedPath) {
-						// Note: We use '#' as delimiters as usual '/' is often used in paths.
-						if ($sExcludedPath !== '' && preg_match('#'.$sExcludedPath.'#', $sPHPFile) === 1) {
-							$bSkipped = true;
-							break;
+					$sPHPFile = self::LocalPath($sPHPFile);
+					if ($sPHPFile !== false) {
+						$sPHPFile = '/'.$sPHPFile; // for regex
+						foreach ($aExcludedPath as $sExcludedPath) {
+							// Note: We use '#' as delimiters as usual '/' is often used in paths.
+							if ($sExcludedPath !== '' && preg_match('#'.$sExcludedPath.'#', $sPHPFile) === 1) {
+								$bSkipped = true;
+								break;
+							}
 						}
+					} else {
+						$bSkipped = true; // file not found
 					}
 				}
 				
@@ -2788,7 +2794,7 @@ HTML;
 		$aResultPref = [];
 		$aShortcutPrefs = appUserPreferences::GetPref('keyboard_shortcuts', []);
 		// Note: Mind the 4 blackslashes, see utils::GetClassesForInterface()
-		$aShortcutClasses = utils::GetClassesForInterface('iKeyboardShortcut', '', array('[\\\\/]lib[\\\\/]', '[\\\\/]node_modules[\\\\/]', '[\\\\/]test[\\\\/]'));
+		$aShortcutClasses = utils::GetClassesForInterface('iKeyboardShortcut', '', array('[\\\\/]lib[\\\\/]', '[\\\\/]node_modules[\\\\/]', '[\\\\/]test[\\\\/]', '[\\\\/]tests[\\\\/]'));
 
 		foreach ($aShortcutClasses as $cShortcutPlugin) {
 			$sTriggeredElement = $cShortcutPlugin::GetShortcutTriggeredElementSelector();
diff --git a/pages/preferences.php b/pages/preferences.php
index b21b8fac1..adf2929c3 100644
--- a/pages/preferences.php
+++ b/pages/preferences.php
@@ -774,7 +774,7 @@ try {
 				break;
 			case 'apply_keyboard_shortcuts':
 				// Note: Mind the 4 blackslashes, see utils::GetClassesForInterface()
-				$aShortcutClasses = utils::GetClassesForInterface('iKeyboardShortcut', '', array('[\\\\/]lib[\\\\/]', '[\\\\/]node_modules[\\\\/]', '[\\\\/]test[\\\\/]'));
+				$aShortcutClasses = utils::GetClassesForInterface('iKeyboardShortcut', '', array('[\\\\/]lib[\\\\/]', '[\\\\/]node_modules[\\\\/]', '[\\\\/]test[\\\\/]', '[\\\\/]tests[\\\\/]'));
 				$aShortcutPrefs = [];
 				foreach ($aShortcutClasses as $cShortcutPlugin) {
 					foreach ($cShortcutPlugin::GetShortcutKeys() as $aShortcutKey) {
diff --git a/sources/application/TwigBase/UI/UIBlockExtension.php b/sources/application/TwigBase/UI/UIBlockExtension.php
index 9af1c1d4d..3a81a647b 100644
--- a/sources/application/TwigBase/UI/UIBlockExtension.php
+++ b/sources/application/TwigBase/UI/UIBlockExtension.php
@@ -8,9 +8,7 @@
 namespace Combodo\iTop\Application\TwigBase\UI;
 
 
-use Exception;
-use ReflectionClass;
-use SetupUtils;
+use Combodo\iTop\Application\UI\Base\iUIBlockFactory;
 use Twig\Extension\AbstractExtension;
 use utils;
 
@@ -30,7 +28,7 @@ class UIBlockExtension extends AbstractExtension
 	{
 		$aParsers = [];
 
-		$sInterface = "Combodo\\iTop\\Application\\UI\\Base\\iUIBlockFactory";
+		$sInterface = iUIBlockFactory::class;
 		$aFactoryClasses = utils::GetClassesForInterface($sInterface, 'UIBlockFactory');
 
 		foreach ($aFactoryClasses as $sFactoryClass) {