diff --git a/tests/Models/NullCategory.php b/tests/Models/NullCategory.php
deleted file mode 100644
index 80da3df..0000000
--- a/tests/Models/NullCategory.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\RiskManagement\tests\Models;
-
-use Modules\RiskManagement\Models\NullCategory;
-
-/**
- * @internal
- */
-final class Null extends \PHPUnit\Framework\TestCase
-{
-    /**
-     * @covers Modules\RiskManagement\Models\NullCategory
-     * @group framework
-     */
-    public function testNull() : void
-    {
-        self::assertInstanceOf('\Modules\RiskManagement\Models\Category', new NullCategory());
-    }
-
-    /**
-     * @covers Modules\RiskManagement\Models\NullCategory
-     * @group framework
-     */
-    public function testId() : void
-    {
-        $null = new NullCategory(2);
-        self::assertEquals(2, $null->getId());
-    }
-}
diff --git a/tests/Models/NullCause.php b/tests/Models/NullCause.php
deleted file mode 100644
index bf7d12f..0000000
--- a/tests/Models/NullCause.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\RiskManagement\tests\Models;
-
-use Modules\RiskManagement\Models\NullCause;
-
-/**
- * @internal
- */
-final class Null extends \PHPUnit\Framework\TestCase
-{
-    /**
-     * @covers Modules\RiskManagement\Models\NullCause
-     * @group framework
-     */
-    public function testNull() : void
-    {
-        self::assertInstanceOf('\Modules\RiskManagement\Models\Cause', new NullCause());
-    }
-
-    /**
-     * @covers Modules\RiskManagement\Models\NullCause
-     * @group framework
-     */
-    public function testId() : void
-    {
-        $null = new NullCause(2);
-        self::assertEquals(2, $null->getId());
-    }
-}
diff --git a/tests/Models/NullDepartment.php b/tests/Models/NullDepartment.php
deleted file mode 100644
index 0e43198..0000000
--- a/tests/Models/NullDepartment.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\RiskManagement\tests\Models;
-
-use Modules\RiskManagement\Models\NullDepartment;
-
-/**
- * @internal
- */
-final class Null extends \PHPUnit\Framework\TestCase
-{
-    /**
-     * @covers Modules\RiskManagement\Models\NullDepartment
-     * @group framework
-     */
-    public function testNull() : void
-    {
-        self::assertInstanceOf('\Modules\RiskManagement\Models\Department', new NullDepartment());
-    }
-
-    /**
-     * @covers Modules\RiskManagement\Models\NullDepartment
-     * @group framework
-     */
-    public function testId() : void
-    {
-        $null = new NullDepartment(2);
-        self::assertEquals(2, $null->getId());
-    }
-}
diff --git a/tests/Models/NullProcess.php b/tests/Models/NullProcess.php
deleted file mode 100644
index 4993ef8..0000000
--- a/tests/Models/NullProcess.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\RiskManagement\tests\Models;
-
-use Modules\RiskManagement\Models\NullProcess;
-
-/**
- * @internal
- */
-final class Null extends \PHPUnit\Framework\TestCase
-{
-    /**
-     * @covers Modules\RiskManagement\Models\NullProcess
-     * @group framework
-     */
-    public function testNull() : void
-    {
-        self::assertInstanceOf('\Modules\RiskManagement\Models\Process', new NullProcess());
-    }
-
-    /**
-     * @covers Modules\RiskManagement\Models\NullProcess
-     * @group framework
-     */
-    public function testId() : void
-    {
-        $null = new NullProcess(2);
-        self::assertEquals(2, $null->getId());
-    }
-}
diff --git a/tests/Models/NullProject.php b/tests/Models/NullProject.php
deleted file mode 100644
index 2261300..0000000
--- a/tests/Models/NullProject.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\RiskManagement\tests\Models;
-
-use Modules\RiskManagement\Models\NullProject;
-
-/**
- * @internal
- */
-final class Null extends \PHPUnit\Framework\TestCase
-{
-    /**
-     * @covers Modules\RiskManagement\Models\NullProject
-     * @group framework
-     */
-    public function testNull() : void
-    {
-        self::assertInstanceOf('\Modules\RiskManagement\Models\Project', new NullProject());
-    }
-
-    /**
-     * @covers Modules\RiskManagement\Models\NullProject
-     * @group framework
-     */
-    public function testId() : void
-    {
-        $null = new NullProject(2);
-        self::assertEquals(2, $null->getId());
-    }
-}
diff --git a/tests/Models/NullRisk.php b/tests/Models/NullRisk.php
deleted file mode 100644
index 9693cca..0000000
--- a/tests/Models/NullRisk.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\RiskManagement\tests\Models;
-
-use Modules\RiskManagement\Models\NullRisk;
-
-/**
- * @internal
- */
-final class Null extends \PHPUnit\Framework\TestCase
-{
-    /**
-     * @covers Modules\RiskManagement\Models\NullRisk
-     * @group framework
-     */
-    public function testNull() : void
-    {
-        self::assertInstanceOf('\Modules\RiskManagement\Models\Risk', new NullRisk());
-    }
-
-    /**
-     * @covers Modules\RiskManagement\Models\NullRisk
-     * @group framework
-     */
-    public function testId() : void
-    {
-        $null = new NullRisk(2);
-        self::assertEquals(2, $null->getId());
-    }
-}
diff --git a/tests/Models/NullRiskObject.php b/tests/Models/NullRiskObject.php
deleted file mode 100644
index 735a6f3..0000000
--- a/tests/Models/NullRiskObject.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\RiskManagement\tests\Models;
-
-use Modules\RiskManagement\Models\NullRiskObject;
-
-/**
- * @internal
- */
-final class Null extends \PHPUnit\Framework\TestCase
-{
-    /**
-     * @covers Modules\RiskManagement\Models\NullRiskObject
-     * @group framework
-     */
-    public function testNull() : void
-    {
-        self::assertInstanceOf('\Modules\RiskManagement\Models\RiskObject', new NullRiskObject());
-    }
-
-    /**
-     * @covers Modules\RiskManagement\Models\NullRiskObject
-     * @group framework
-     */
-    public function testId() : void
-    {
-        $null = new NullRiskObject(2);
-        self::assertEquals(2, $null->getId());
-    }
-}
diff --git a/tests/Models/NullSolution.php b/tests/Models/NullSolution.php
deleted file mode 100644
index 2bc3f9b..0000000
--- a/tests/Models/NullSolution.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\RiskManagement\tests\Models;
-
-use Modules\RiskManagement\Models\NullSolution;
-
-/**
- * @internal
- */
-final class Null extends \PHPUnit\Framework\TestCase
-{
-    /**
-     * @covers Modules\RiskManagement\Models\NullSolution
-     * @group framework
-     */
-    public function testNull() : void
-    {
-        self::assertInstanceOf('\Modules\RiskManagement\Models\Solution', new NullSolution());
-    }
-
-    /**
-     * @covers Modules\RiskManagement\Models\NullSolution
-     * @group framework
-     */
-    public function testId() : void
-    {
-        $null = new NullSolution(2);
-        self::assertEquals(2, $null->getId());
-    }
-}