diff --git a/tests/Admin/AdminTest.php b/tests/Admin/AdminTest.php
new file mode 100644
index 0000000..3cdb653
--- /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\HumanResourceManagement\Admin;
+
+/**
+ * @internal
+ */
+class AdminTest extends \PHPUnit\Framework\TestCase
+{
+    protected const MODULE_NAME = 'HumanResourceManagement';
+    protected const URI_LOAD = '';
+
+    use \Modules\tests\ModuleTestTrait;
+}
diff --git a/tests/Models/EmployeeHistoryMapperTest.php b/tests/Models/EmployeeHistoryMapperTest.php
new file mode 100644
index 0000000..d2dc06f
--- /dev/null
+++ b/tests/Models/EmployeeHistoryMapperTest.php
@@ -0,0 +1,40 @@
+<?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\HumanResourceManagement\Models;
+
+use Modules\HumanResourceManagement\Models\Employee;
+use Modules\HumanResourceManagement\Models\EmployeeHistory;
+use Modules\HumanResourceManagement\Models\EmployeeHistoryMapper;
+use Modules\Profile\Models\ProfileMapper;
+
+/**
+ * @internal
+ */
+class EmployeeHistoryMapperTest extends \PHPUnit\Framework\TestCase
+{
+    public function testCRUD() : void
+    {
+        $employee = new Employee(ProfileMapper::get(1));
+
+        $history = new EmployeeHistory($employee);
+
+        $id = EmployeeHistoryMapper::create($history);
+        self::assertGreaterThan(0, $history->getId());
+        self::assertEquals($id, $history->getId());
+
+        $historyR = EmployeeHistoryMapper::get($history->getId());
+        self::assertEquals($history->getEmployee()->getId(), $historyR->getEmployee()->getId());
+    }
+}
diff --git a/tests/Models/EmployeeMapperTest.php b/tests/Models/EmployeeMapperTest.php
new file mode 100644
index 0000000..73aae8b
--- /dev/null
+++ b/tests/Models/EmployeeMapperTest.php
@@ -0,0 +1,48 @@
+<?php
+/**
+ * Orange Management
+ *
+ * PHP Version 7.4
+ *
+ * @package   tests
+ * @copyright Dennis Eichhorn
+ * @license   OMS License 1.0
+ * @version   1.0.0
+ * @link      https://orange-management.org
+ */
+declare(strict_types=1);
+
+namespace Modules\tests\HumanResourceManagement\Models;
+
+use Modules\Admin\Models\AccountMapper;
+use Modules\HumanResourceManagement\Models\Employee;
+use Modules\HumanResourceManagement\Models\EmployeeMapper;
+use Modules\Profile\Models\Profile;
+use Modules\Profile\Models\ProfileMapper;
+
+/**
+ * @internal
+ */
+class EmployeeMapperTest extends \PHPUnit\Framework\TestCase
+{
+    public function testCRUD() : void
+    {
+        if (($profile = ProfileMapper::getFor(1, 'account'))->getId() === 0) {
+            $profile = new Profile();
+
+            $profile->setAccount(AccountMapper::get(1));
+            $profile->setBirthday($date = new \DateTime('now'));
+
+            $id = ProfileMapper::create($profile);
+        }
+
+        $employee = new Employee(ProfileMapper::getFor(1, 'account'));
+
+        $id = EmployeeMapper::create($employee);
+        self::assertGreaterThan(0, $employee->getId());
+        self::assertEquals($id, $employee->getId());
+
+        $employeeR = EmployeeMapper::get($employee->getId());
+        self::assertEquals($employee->getProfile()->getId(), $employeeR->getProfile()->getId());
+    }
+}
diff --git a/tests/Models/EmployeeTest.php b/tests/Models/EmployeeTest.php
new file mode 100644
index 0000000..26d978b
--- /dev/null
+++ b/tests/Models/EmployeeTest.php
@@ -0,0 +1,37 @@
+<?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\HumanResourceManagement\Models;
+
+use Modules\HumanResourceManagement\Models\Employee;
+
+/**
+ * @internal
+ */
+class EmployeeTest extends \PHPUnit\Framework\TestCase
+{
+    public function testDefault() : void
+    {
+        $employee = new Employee();
+
+        self::assertEquals(0, $employee->getId());
+        self::assertGreaterThan(0, \strlen($employee->getSemiPrivateHash()));
+        self::assertFalse($employee->compareSemiPrivateHash('123'));
+        self::assertInstanceOf('\Modules\Media\Models\NullMedia', $employee->getImage());
+        self::assertInstanceOf('\Modules\HumanResourceManagement\Models\NullEmployeeHistory', $employee->getNewestHistory());
+        self::assertEquals([], $employee->getHistory());
+        self::assertEquals([], $employee->getEducationHistory());
+        self::assertEquals([], $employee->getWorkHistory());
+    }
+}
diff --git a/tests/Models/EmplyeeHistoryTest.php b/tests/Models/EmplyeeHistoryTest.php
new file mode 100644
index 0000000..5fe1d7c
--- /dev/null
+++ b/tests/Models/EmplyeeHistoryTest.php
@@ -0,0 +1,36 @@
+<?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\HumanResourceManagement\Models;
+
+use Modules\HumanResourceManagement\Models\EmployeeHistory;
+
+/**
+ * @internal
+ */
+class EmployeeHistoryTest extends \PHPUnit\Framework\TestCase
+{
+    public function testDefault() : void
+    {
+        $history = new EmployeeHistory();
+
+        self::assertEquals(0, $history->getId());
+        self::assertNull($history->getEnd());
+        self::assertInstanceOf('\Modules\HumanResourceManagement\Models\NullEmployee', $history->getEmployee());
+        self::assertInstanceOf('\Modules\Organization\Models\NullPosition', $history->getPosition());
+        self::assertInstanceOf('\Modules\Organization\Models\NullUnit', $history->getUnit());
+        self::assertInstanceOf('\Modules\Organization\Models\NullDepartment', $history->getDepartment());
+        self::assertInstanceOf('\DateTime', $history->getStart());
+    }
+}