diff --git a/tests/Admin/AdminTest.php b/tests/Admin/AdminTest.php
new file mode 100644
index 0000000..e235d93
--- /dev/null
+++ b/tests/Admin/AdminTest.php
@@ -0,0 +1,26 @@
+<?php
+/**
+ * Orange Management
+ *
+ * PHP Version 7.4
+ *
+ * @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\tests\Organization\Admin;
+
+/**
+ * @internal
+ */
+class AdminTest extends \PHPUnit\Framework\TestCase
+{
+    protected const MODULE_NAME = 'Organization';
+    protected const URI_LOAD = 'http://127.0.0.1/en/backend/organization';
+
+    use \Modules\tests\ModuleTestTrait;
+}
diff --git a/tests/ControllerTest.php b/tests/ControllerTest.php
new file mode 100644
index 0000000..ee7a828
--- /dev/null
+++ b/tests/ControllerTest.php
@@ -0,0 +1,304 @@
+<?php
+/**
+ * Orange Management
+ *
+ * PHP Version 7.4
+ *
+ * @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\tests\Organization;
+
+require_once __DIR__ . '/../Autoloader.php';
+
+use Model\CoreSettings;
+use Modules\Admin\Models\AccountPermission;
+use Modules\Organization\Models\Status;
+use phpOMS\Account\Account;
+use phpOMS\Account\AccountManager;
+use phpOMS\Account\PermissionType;
+use phpOMS\Application\ApplicationAbstract;
+use phpOMS\Dispatcher\Dispatcher;
+
+use phpOMS\Event\EventManager;
+use phpOMS\Message\Http\HttpRequest;
+
+use phpOMS\Message\Http\HttpResponse;
+use phpOMS\Module\ModuleManager;
+use phpOMS\Router\WebRouter;
+
+use phpOMS\Uri\HttpUri;
+
+use phpOMS\Utils\TestUtils;
+
+/**
+ * @internal
+ */
+class ControllerTest extends \PHPUnit\Framework\TestCase
+{
+    protected $app    = null;
+    protected $module = null;
+
+    protected function setUp() : void
+    {
+        $this->app = new class() extends ApplicationAbstract
+        {
+            protected string $appName = 'Api';
+        };
+
+        $this->app->dbPool         = $GLOBALS['dbpool'];
+        $this->app->orgId          = 1;
+        $this->app->appName        = 'Backend';
+        $this->app->accountManager = new AccountManager($GLOBALS['session']);
+        $this->app->appSettings    = new CoreSettings($this->app->dbPool->get());
+        $this->app->moduleManager  = new ModuleManager($this->app, __DIR__ . '/../../../Modules');
+        $this->app->dispatcher     = new Dispatcher($this->app);
+        $this->app->eventManager   = new EventManager($this->app->dispatcher);
+        $this->app->eventManager->importFromFile(__DIR__ . '/../../../Web/Api/Hooks.php');
+
+        $account = new Account();
+        TestUtils::setMember($account, 'id', 1);
+
+        $permission = new AccountPermission();
+        $permission->setUnit(1);
+        $permission->setApp('backend');
+        $permission->setPermission(
+            PermissionType::READ
+            | PermissionType::CREATE
+            | PermissionType::MODIFY
+            | PermissionType::DELETE
+            | PermissionType::PERMISSION
+        );
+
+        $account->addPermission($permission);
+
+        $this->app->accountManager->add($account);
+        $this->app->router = new WebRouter();
+
+        $this->module = $this->app->moduleManager->get('Organization');
+
+        TestUtils::setMember($this->module, 'app', $this->app);
+    }
+
+    /**
+     * @covers Modules\Organization\Controller\ApiController
+     * @group module
+     */
+    public function testApiUnitGet() : void
+    {
+        $response = new HttpResponse();
+        $request  = new HttpRequest(new HttpUri(''));
+
+        $request->getHeader()->setAccount(1);
+        $request->setData('id', '1');
+
+        $this->module->apiUnitGet($request, $response);
+
+        self::assertEquals('Orange-Management', $response->get('')['response']->getName());
+        self::assertGreaterThan(0, $response->get('')['response']->getId());
+    }
+
+    /**
+     * @covers Modules\Organization\Controller\ApiController
+     * @group module
+     */
+    public function testApiUnitSet() : void
+    {
+        $response = new HttpResponse();
+        $request  = new HttpRequest(new HttpUri(''));
+
+        $request->getHeader()->setAccount(1);
+        $request->setData('id', '1');
+        $request->setData('name', 'OMS');
+
+        $this->module->apiUnitSet($request, $response);
+        $this->module->apiUnitGet($request, $response);
+
+        self::assertEquals('OMS', $response->get('')['response']->getName());
+    }
+
+    /**
+     * @covers Modules\Organization\Controller\ApiController
+     * @group module
+     */
+    public function testApiUnitCreateDelete() : void
+    {
+        $response = new HttpResponse();
+        $request  = new HttpRequest(new HttpUri(''));
+
+        $request->getHeader()->setAccount(1);
+        $request->setData('name', 'test');
+        $request->setData('status', Status::INACTIVE);
+        $request->setData('description', 'test description');
+
+        $this->module->apiUnitCreate($request, $response);
+
+        self::assertEquals('test', $response->get('')['response']->getName());
+        self::assertGreaterThan(0, $response->get('')['response']->getId());
+
+        // test delete
+        $request->setData('id', $response->get('')['response']->getId());
+        $this->module->apiUnitDelete($request, $response);
+
+        self::assertGreaterThan(0, $response->get('')['response']->getId());
+    }
+
+    protected static $departmentId = 0;
+
+    /**
+     * @covers Modules\Organization\Controller\ApiController
+     * @group module
+     */
+    public function testApiDepartmentCreate() : void
+    {
+        $response = new HttpResponse();
+        $request  = new HttpRequest(new HttpUri(''));
+
+        $request->getHeader()->setAccount(1);
+        $request->setData('name', 'test');
+        $request->setData('status', Status::INACTIVE);
+        $request->setData('unit', 1);
+        $request->setData('description', 'test description');
+
+        $this->module->apiDepartmentCreate($request, $response);
+
+        self::assertEquals('test', $response->get('')['response']->getName());
+        self::assertGreaterThan(0, $response->get('')['response']->getId());
+
+        self::$departmentId = $response->get('')['response']->getId();
+    }
+
+    /**
+     * @covers Modules\Organization\Controller\ApiController
+     * @group module
+     */
+    public function testApiDepartmentGet() : void
+    {
+        $response = new HttpResponse();
+        $request  = new HttpRequest(new HttpUri(''));
+
+        $request->getHeader()->setAccount(1);
+        $request->setData('id', self::$departmentId);
+
+        $this->module->apiDepartmentGet($request, $response);
+
+        self::assertEquals('test', $response->get('')['response']->getName());
+        self::assertGreaterThan(0, $response->get('')['response']->getId());
+    }
+
+    /**
+     * @covers Modules\Organization\Controller\ApiController
+     * @group module
+     */
+    public function testApiDepartmentSet() : void
+    {
+        $response = new HttpResponse();
+        $request  = new HttpRequest(new HttpUri(''));
+
+        $request->getHeader()->setAccount(1);
+        $request->setData('id', self::$departmentId);
+        $request->setData('name', 'Production');
+
+        $this->module->apiDepartmentSet($request, $response);
+        $this->module->apiDepartmentGet($request, $response);
+
+        self::assertEquals('Production', $response->get('')['response']->getName());
+    }
+
+    /**
+     * @covers Modules\Organization\Controller\ApiController
+     * @group module
+     */
+    public function testApiDepartmentDelete() : void
+    {
+        $response = new HttpResponse();
+        $request  = new HttpRequest(new HttpUri(''));
+
+        $request->getHeader()->setAccount(1);
+        $request->setData('id', self::$departmentId);
+        $this->module->apiDepartmentDelete($request, $response);
+
+        self::assertGreaterThan(0, $response->get('')['response']->getId());
+    }
+
+    protected static $positionId = 0;
+
+    /**
+     * @covers Modules\Organization\Controller\ApiController
+     * @group module
+     */
+    public function testApiPositionCreate() : void
+    {
+        $response = new HttpResponse();
+        $request  = new HttpRequest(new HttpUri(''));
+
+        $request->getHeader()->setAccount(1);
+        $request->setData('name', 'test');
+        $request->setData('status', Status::INACTIVE);
+        $request->setData('description', 'test description');
+
+        $this->module->apiPositionCreate($request, $response);
+
+        self::assertEquals('test', $response->get('')['response']->getName());
+        self::assertGreaterThan(0, $response->get('')['response']->getId());
+        self::$positionId = $response->get('')['response']->getId();
+    }
+
+    /**
+     * @covers Modules\Organization\Controller\ApiController
+     * @group module
+     */
+    public function testApiPositionGet() : void
+    {
+        $response = new HttpResponse();
+        $request  = new HttpRequest(new HttpUri(''));
+
+        $request->getHeader()->setAccount(1);
+        $request->setData('id', self::$positionId);
+
+        $this->module->apiPositionGet($request, $response);
+
+        self::assertEquals('test', $response->get('')['response']->getName());
+        self::assertGreaterThan(0, $response->get('')['response']->getId());
+    }
+
+    /**
+     * @covers Modules\Organization\Controller\ApiController
+     * @group module
+     */
+    public function testApiPositionSet() : void
+    {
+        $response = new HttpResponse();
+        $request  = new HttpRequest(new HttpUri(''));
+
+        $request->getHeader()->setAccount(1);
+        $request->setData('id', self::$positionId);
+        $request->setData('name', 'Test');
+
+        $this->module->apiPositionSet($request, $response);
+        $this->module->apiPositionGet($request, $response);
+
+        self::assertEquals('Test', $response->get('')['response']->getName());
+    }
+
+    /**
+     * @covers Modules\Organization\Controller\ApiController
+     * @group module
+     */
+    public function testApiPositionDelete() : void
+    {
+        $response = new HttpResponse();
+        $request  = new HttpRequest(new HttpUri(''));
+
+        $request->getHeader()->setAccount(1);
+        $request->setData('id', self::$positionId);
+        $this->module->apiPositionDelete($request, $response);
+
+        self::assertGreaterThan(0, $response->get('')['response']->getId());
+    }
+}
diff --git a/tests/Models/DepartmentMapperTest.php b/tests/Models/DepartmentMapperTest.php
new file mode 100644
index 0000000..9cefabd
--- /dev/null
+++ b/tests/Models/DepartmentMapperTest.php
@@ -0,0 +1,118 @@
+<?php
+/**
+ * Orange Management
+ *
+ * PHP Version 7.4
+ *
+ * @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\tests\Organization\Models;
+
+use Modules\Organization\Models\Department;
+use Modules\Organization\Models\DepartmentMapper;
+use Modules\Organization\Models\NullDepartment;
+use Modules\Organization\Models\NullUnit;
+
+/**
+ * @internal
+ */
+class DepartmentMapperTest extends \PHPUnit\Framework\TestCase
+{
+    public function testCRUD() : void
+    {
+        $department = new Department();
+        $department->setName('Management');
+        $department->setDescription('Description');
+        $department->setUnit(new NullUnit(1));
+
+        $id = DepartmentMapper::create($department);
+
+        $departmentR = DepartmentMapper::get($id);
+        self::assertEquals($id, $departmentR->getId());
+        self::assertEquals($department->getName(), $departmentR->getName());
+        self::assertEquals($department->getDescription(), $departmentR->getDescription());
+        self::assertInstanceOf('Modules\Organization\Models\NullDepartment', $departmentR->getParent());
+        self::assertEquals($department->getUnit()->getId(), $departmentR->getUnit()->getId());
+
+    }
+
+    /**
+     * @group         volume
+     * @slowThreshold 15000
+     * @group module
+     */
+    public function testVolume() : void
+    {
+        $first = 2;
+
+        /* 2 */
+        $department = new Department();
+        $department->setName('HR');
+        $department->setDescription('Description');
+        $department->setParent(new NullDepartment($first));
+        $department->setUnit(new NullUnit(1));
+        DepartmentMapper::create($department);
+
+        /* 3 */
+        $department = new Department();
+        $department->setName('QM');
+        $department->setDescription('Description');
+        $department->setParent(new NullDepartment($first));
+        $department->setUnit(new NullUnit(1));
+        DepartmentMapper::create($department);
+
+        /* 4 */
+        $department = new Department();
+        $department->setName('Sales');
+        $department->setDescription('Description');
+        $department->setParent(new NullDepartment($first));
+        $department->setUnit(new NullUnit(1));
+        DepartmentMapper::create($department);
+
+        /* 5 */
+        $department = new Department();
+        $department->setName('Shipping');
+        $department->setDescription('Description');
+        $department->setParent(new NullDepartment($first + 3));
+        $department->setUnit(new NullUnit(1));
+        DepartmentMapper::create($department);
+
+        /* 6 */
+        $department = new Department();
+        $department->setName('Purchase');
+        $department->setDescription('Description');
+        $department->setParent(new NullDepartment($first));
+        $department->setUnit(new NullUnit(1));
+        DepartmentMapper::create($department);
+
+        /* 7 */
+        $department = new Department();
+        $department->setName('Arrival');
+        $department->setDescription('Description');
+        $department->setParent(new NullDepartment($first + 5));
+        $department->setUnit(new NullUnit(1));
+        DepartmentMapper::create($department);
+
+        /* 8 */
+        $department = new Department();
+        $department->setName('Accounting');
+        $department->setDescription('Description');
+        $department->setParent(new NullDepartment($first));
+        $department->setUnit(new NullUnit(1));
+        DepartmentMapper::create($department);
+
+        /* 9 */
+        $department = new Department();
+        $department->setName('Production');
+        $department->setDescription('Description');
+        $department->setParent(new NullDepartment($first));
+        $department->setUnit(new NullUnit(1));
+        DepartmentMapper::create($department);
+    }
+}
diff --git a/tests/Models/DepartmentTest.php b/tests/Models/DepartmentTest.php
new file mode 100644
index 0000000..0f4c72e
--- /dev/null
+++ b/tests/Models/DepartmentTest.php
@@ -0,0 +1,58 @@
+<?php
+/**
+ * Orange Management
+ *
+ * PHP Version 7.4
+ *
+ * @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\tests\Organization\Models;
+
+use Modules\Organization\Models\Department;
+use Modules\Organization\Models\NullDepartment;
+use Modules\Organization\Models\NullUnit;
+use Modules\Organization\Models\Status;
+
+/**
+ * @internal
+ */
+class DepartmentTest extends \PHPUnit\Framework\TestCase
+{
+    public function testDefault() : void
+    {
+        $department = new Department();
+
+        self::assertEquals(0, $department->getId());
+        self::assertEquals('', $department->getName());
+        self::assertEquals('', $department->getDescription());
+        self::assertInstanceOf('Modules\Organization\Models\NullDepartment', $department->getParent());
+        self::assertEquals(0, $department->getUnit()->getId());
+        self::assertEquals(Status::INACTIVE, $department->getStatus());
+    }
+
+    public function testSetGet() : void
+    {
+        $department = new Department();
+
+        $department->setName('Name');
+        self::assertEquals('Name', $department->getName());
+
+        $department->setStatus(Status::ACTIVE);
+        self::assertEquals(Status::ACTIVE, $department->getStatus());
+
+        $department->setDescription('Description');
+        self::assertEquals('Description', $department->getDescription());
+
+        $department->setParent(new NullDepartment(1));
+        self::assertEquals(1, $department->getParent()->getId());
+
+        $department->setUnit(new NullUnit(1));
+        self::assertEquals(1, $department->getUnit()->getId());
+    }
+}
diff --git a/tests/Models/PositionMapperTest.php b/tests/Models/PositionMapperTest.php
new file mode 100644
index 0000000..7df0d2c
--- /dev/null
+++ b/tests/Models/PositionMapperTest.php
@@ -0,0 +1,106 @@
+<?php
+/**
+ * Orange Management
+ *
+ * PHP Version 7.4
+ *
+ * @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\tests\Organization\Models;
+
+use Modules\Organization\Models\NullPosition;
+use Modules\Organization\Models\Position;
+use Modules\Organization\Models\PositionMapper;
+
+/**
+ * @internal
+ */
+class PositionMapperTest extends \PHPUnit\Framework\TestCase
+{
+    public function testCRUD() : void
+    {
+        $position = new Position();
+        $position->setName('CEO');
+        $position->setDescription('Description');
+
+        $id = PositionMapper::create($position);
+
+        $positionR = PositionMapper::get($id);
+        self::assertEquals($id, $positionR->getId());
+        self::assertEquals($position->getName(), $positionR->getName());
+        self::assertEquals($position->getDescription(), $positionR->getDescription());
+        self::assertInstanceOf('Modules\Organization\Models\NullPosition', $positionR->getParent());
+    }
+
+    /**
+     * @group         volume
+     * @slowThreshold 15000
+     * @group module
+     */
+    public function testVolume() : void
+    {
+        $first = 2;
+
+        /* 4 */
+        $position = new Position();
+        $position->setName('CFO');
+        $position->setDescription('Description');
+        $position->setParent(new NullPosition($first));
+        $id = PositionMapper::create($position);
+
+        /* 5 */
+        $position = new Position();
+        $position->setName('Accountant');
+        $position->setDescription('Description');
+        $position->setParent(new NullPosition($id));
+        PositionMapper::create($position);
+
+        /* 6 */
+        $position = new Position();
+        $position->setName('Controller');
+        $position->setDescription('Description');
+        $position->setParent(new NullPosition($id));
+        PositionMapper::create($position);
+
+        /* 7 */
+        $position = new Position();
+        $position->setName('Sales Director');
+        $position->setDescription('Description');
+        $position->setParent(new NullPosition($first));
+        PositionMapper::create($position);
+
+        /* 8 */
+        $position = new Position();
+        $position->setName('Purchase Director');
+        $position->setDescription('Description');
+        $position->setParent(new NullPosition($first));
+        PositionMapper::create($position);
+
+        /* 9 */
+        $position = new Position();
+        $position->setName('Territory Manager');
+        $position->setDescription('Description');
+        $position->setParent(new NullPosition($first + 4));
+        PositionMapper::create($position);
+
+        /* 10 */
+        $position = new Position();
+        $position->setName('Territory Sales Assistant');
+        $position->setDescription('Description');
+        $position->setParent(new NullPosition($first + 6));
+        PositionMapper::create($position);
+
+        /* 11 */
+        $position = new Position();
+        $position->setName('Domestic Sales Manager');
+        $position->setDescription('Description');
+        $position->setParent(new NullPosition($first + 4));
+        PositionMapper::create($position);
+    }
+}
diff --git a/tests/Models/PositionTest.php b/tests/Models/PositionTest.php
new file mode 100644
index 0000000..a147fd6
--- /dev/null
+++ b/tests/Models/PositionTest.php
@@ -0,0 +1,58 @@
+<?php
+/**
+ * Orange Management
+ *
+ * PHP Version 7.4
+ *
+ * @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\tests\Organization\Models;
+
+use Modules\Organization\Models\NullDepartment;
+use Modules\Organization\Models\NullPosition;
+use Modules\Organization\Models\Position;
+use Modules\Organization\Models\Status;
+
+/**
+ * @internal
+ */
+class PositionTest extends \PHPUnit\Framework\TestCase
+{
+    public function testDefault() : void
+    {
+        $position = new Position();
+
+        self::assertEquals(0, $position->getId());
+        self::assertEquals('', $position->getName());
+        self::assertEquals('', $position->getDescription());
+        self::assertInstanceOf('Modules\Organization\Models\NullPosition', $position->getParent());
+        self::assertEquals(Status::INACTIVE, $position->getStatus());
+        self::assertInstanceOf('\Modules\Organization\Models\NullDepartment', $position->getDepartment());
+    }
+
+    public function testSetGet() : void
+    {
+        $position = new Position();
+
+        $position->setName('Name');
+        self::assertEquals('Name', $position->getName());
+
+        $position->setStatus(Status::ACTIVE);
+        self::assertEquals(Status::ACTIVE, $position->getStatus());
+
+        $position->setDepartment(new NullDepartment(2));
+        self::assertEquals(2, $position->getDepartment()->getId());
+
+        $position->setDescription('Description');
+        self::assertEquals('Description', $position->getDescription());
+
+        $position->setParent(new NullPosition(2));
+        self::assertEquals(2, $position->getParent()->getId());
+    }
+}
diff --git a/tests/Models/UnitMapperTest.php b/tests/Models/UnitMapperTest.php
new file mode 100644
index 0000000..00dc6a0
--- /dev/null
+++ b/tests/Models/UnitMapperTest.php
@@ -0,0 +1,41 @@
+<?php
+/**
+ * Orange Management
+ *
+ * PHP Version 7.4
+ *
+ * @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\tests\Organization\Models;
+
+use Modules\Organization\Models\NullUnit;
+use Modules\Organization\Models\Unit;
+use Modules\Organization\Models\UnitMapper;
+
+/**
+ * @internal
+ */
+class UnitMapperTest extends \PHPUnit\Framework\TestCase
+{
+    public function testCRUD() : void
+    {
+        $unit = new Unit();
+        $unit->setName('Scrooge Inc.');
+        $unit->setDescription('Description');
+        $unit->setParent(new NullUnit(1));
+
+        $id = UnitMapper::create($unit);
+
+        $unitR = UnitMapper::get($id);
+        self::assertEquals($id, $unitR->getId());
+        self::assertEquals($unit->getName(), $unitR->getName());
+        self::assertEquals($unit->getDescription(), $unitR->getDescription());
+        self::assertEquals($unit->getParent()->getId(), $unitR->getParent()->getId());
+    }
+}
diff --git a/tests/Models/UnitTest.php b/tests/Models/UnitTest.php
new file mode 100644
index 0000000..91f4e9c
--- /dev/null
+++ b/tests/Models/UnitTest.php
@@ -0,0 +1,53 @@
+<?php
+/**
+ * Orange Management
+ *
+ * PHP Version 7.4
+ *
+ * @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\tests\Organization\Models;
+
+use Modules\Organization\Models\NullUnit;
+use Modules\Organization\Models\Status;
+use Modules\Organization\Models\Unit;
+
+/**
+ * @internal
+ */
+class UnitTest extends \PHPUnit\Framework\TestCase
+{
+    public function testDefault() : void
+    {
+        $unit = new Unit();
+
+        self::assertEquals(0, $unit->getId());
+        self::assertEquals('', $unit->getName());
+        self::assertEquals('', $unit->getDescription());
+        self::assertInstanceOf('Modules\Organization\Models\NullUnit', $unit->getParent());
+        self::assertEquals(Status::INACTIVE, $unit->getStatus());
+    }
+
+    public function testSetGet() : void
+    {
+        $unit = new Unit();
+
+        $unit->setName('Name');
+        self::assertEquals('Name', $unit->getName());
+
+        $unit->setStatus(Status::ACTIVE);
+        self::assertEquals(Status::ACTIVE, $unit->getStatus());
+
+        $unit->setDescription('Description');
+        self::assertEquals('Description', $unit->getDescription());
+
+        $unit->setParent(new NullUnit(1));
+        self::assertEquals(1, $unit->getParent()->getId());
+    }
+}