diff --git a/inc/config.class.php b/inc/config.class.php
index 41f6507..7f5753d 100644
--- a/inc/config.class.php
+++ b/inc/config.class.php
@@ -54,7 +54,7 @@ class PluginTreeviewConfig extends CommonDBTM
     /**
     * Display name of itemtype
     *
-    * @return value name of this itemtype
+    * @return string
     **/
     public static function getTypeName($nb = 0)
     {
diff --git a/inc/profile.class.php b/inc/profile.class.php
index 7183953..44b6a3f 100644
--- a/inc/profile.class.php
+++ b/inc/profile.class.php
@@ -159,7 +159,7 @@ public function getTabNameForItem(CommonGLPI $item, $withtemplate = 0)
     public static function displayTabContentForItem(CommonGLPI $item, $tabnum = 1, $withtemplate = 0)
     {
 
-        if ($item->getType() == 'Profile') {
+        if ($item instanceof Profile) {
             $prof = new self();
             $ID = $item->getField('id');
             if (!$prof->GetfromDB($ID)) {
diff --git a/phpstan.neon b/phpstan.neon
index d248bf4..a50665a 100644
--- a/phpstan.neon
+++ b/phpstan.neon
@@ -1,7 +1,7 @@
 parameters:
     parallel:
         maximumNumberOfProcesses: 2
-    level: 1
+    level: 5
     bootstrapFiles:
         - ../../inc/based_config.php
     paths: