diff --git a/tests/Models/NullWikiApp.php b/tests/Models/NullWikiApp.php
deleted file mode 100644
index a93dc6a..0000000
--- a/tests/Models/NullWikiApp.php
+++ /dev/null
@@ -1,42 +0,0 @@
-<?php
-/**
- * Orange Management
- *
- * PHP Version 8.0
- *
- * @package   tests
- * @copyright Dennis Eichhorn
- * @license   OMS License 1.0
- * @version   1.0.0
- * @link      https://orange-management.org
- */
-declare(strict_types=1);
-
-namespace Modules\Knowledgebase\tests\Models;
-
-use Modules\Knowledgebase\Models\NullWikiApp;
-
-/**
- * @internal
- */
-final class Null extends \PHPUnit\Framework\TestCase
-{
-    /**
-     * @covers Modules\Knowledgebase\Models\NullWikiApp
-     * @group framework
-     */
-    public function testNull() : void
-    {
-        self::assertInstanceOf('\Modules\Knowledgebase\Models\WikiApp', new NullWikiApp());
-    }
-
-    /**
-     * @covers Modules\Knowledgebase\Models\NullWikiApp
-     * @group framework
-     */
-    public function testId() : void
-    {
-        $null = new NullWikiApp(2);
-        self::assertEquals(2, $null->getId());
-    }
-}
diff --git a/tests/Models/NullWikiCategory.php b/tests/Models/NullWikiCategory.php
deleted file mode 100644
index 315a429..0000000
--- a/tests/Models/NullWikiCategory.php
+++ /dev/null
@@ -1,42 +0,0 @@
-<?php
-/**
- * Orange Management
- *
- * PHP Version 8.0
- *
- * @package   tests
- * @copyright Dennis Eichhorn
- * @license   OMS License 1.0
- * @version   1.0.0
- * @link      https://orange-management.org
- */
-declare(strict_types=1);
-
-namespace Modules\Knowledgebase\tests\Models;
-
-use Modules\Knowledgebase\Models\NullWikiCategory;
-
-/**
- * @internal
- */
-final class Null extends \PHPUnit\Framework\TestCase
-{
-    /**
-     * @covers Modules\Knowledgebase\Models\NullWikiCategory
-     * @group framework
-     */
-    public function testNull() : void
-    {
-        self::assertInstanceOf('\Modules\Knowledgebase\Models\WikiCategory', new NullWikiCategory());
-    }
-
-    /**
-     * @covers Modules\Knowledgebase\Models\NullWikiCategory
-     * @group framework
-     */
-    public function testId() : void
-    {
-        $null = new NullWikiCategory(2);
-        self::assertEquals(2, $null->getId());
-    }
-}
diff --git a/tests/Models/NullWikiDoc.php b/tests/Models/NullWikiDoc.php
deleted file mode 100644
index 4da5662..0000000
--- a/tests/Models/NullWikiDoc.php
+++ /dev/null
@@ -1,42 +0,0 @@
-<?php
-/**
- * Orange Management
- *
- * PHP Version 8.0
- *
- * @package   tests
- * @copyright Dennis Eichhorn
- * @license   OMS License 1.0
- * @version   1.0.0
- * @link      https://orange-management.org
- */
-declare(strict_types=1);
-
-namespace Modules\Knowledgebase\tests\Models;
-
-use Modules\Knowledgebase\Models\NullWikiDoc;
-
-/**
- * @internal
- */
-final class Null extends \PHPUnit\Framework\TestCase
-{
-    /**
-     * @covers Modules\Knowledgebase\Models\NullWikiDoc
-     * @group framework
-     */
-    public function testNull() : void
-    {
-        self::assertInstanceOf('\Modules\Knowledgebase\Models\WikiDoc', new NullWikiDoc());
-    }
-
-    /**
-     * @covers Modules\Knowledgebase\Models\NullWikiDoc
-     * @group framework
-     */
-    public function testId() : void
-    {
-        $null = new NullWikiDoc(2);
-        self::assertEquals(2, $null->getId());
-    }
-}