diff --git a/phpunit.xml b/phpunit.xml
index eb1e983..425bec3 100644
--- a/phpunit.xml
+++ b/phpunit.xml
@@ -2,7 +2,7 @@
 <phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" backupGlobals="false" bootstrap="phpunit.php" colors="true" processIsolation="false" xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/10.5/phpunit.xsd" cacheDirectory=".phpunit.cache" backupStaticProperties="false">
   <testsuites>
     <testsuite name="Package Test Suite">
-      <directory suffix=".php">./tests/</directory>
+      <directory suffix="Test.php">./tests/</directory>
     </testsuite>
   </testsuites>
   <source>
diff --git a/tests/ScopedNodeTest.php b/tests/ScopedNodeTest.php
index 28ec56f..6886263 100644
--- a/tests/ScopedNodeTest.php
+++ b/tests/ScopedNodeTest.php
@@ -3,6 +3,8 @@
 use Illuminate\Database\Capsule\Manager as Capsule;
 use Kalnoy\Nestedset\NestedSet;
 
+include __DIR__ . '/models/MenuItem.php';
+
 class ScopedNodeTest extends PHPUnit\Framework\TestCase
 {
 	public static function setUpBeforeClass(): void
diff --git a/tests/models/DuplicateCategory.php b/tests/models/DuplicateCategory.php
index a658995..c3b1e61 100644
--- a/tests/models/DuplicateCategory.php
+++ b/tests/models/DuplicateCategory.php
@@ -1,6 +1,8 @@
 <?php
 
-class DuplicateCategory extends \Illuminate\Database\Eloquent\Model implements \Kalnoy\Nestedset\Node
+use Illuminate\Database\Eloquent\Model;
+
+class DuplicateCategory extends Model implements \Kalnoy\Nestedset\Node
 {
 	use \Kalnoy\Nestedset\NodeTrait;
 
diff --git a/tests/models/MenuItem.php b/tests/models/MenuItem.php
index 7171077..5dbb1b4 100644
--- a/tests/models/MenuItem.php
+++ b/tests/models/MenuItem.php
@@ -1,6 +1,8 @@
 <?php
 
-class MenuItem extends \Illuminate\Database\Eloquent\Model implements \Kalnoy\Nestedset\Node
+use Illuminate\Database\Eloquent\Model;
+
+class MenuItem extends Model implements \Kalnoy\Nestedset\Node
 {
 	use \Kalnoy\Nestedset\NodeTrait;