diff --git a/tests/Admin/AdminTest.php b/tests/Admin/AdminTest.php
new file mode 100644
index 0000000..4664b91
--- /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\QA\tests\Admin;
+
+/**
+ * @internal
+ */
+class AdminTest extends \PHPUnit\Framework\TestCase
+{
+    protected const MODULE_NAME = 'QA';
+    protected const URI_LOAD = 'http://127.0.0.1/en/backend/qa';
+
+    use \Modules\tests\ModuleTestTrait;
+}
diff --git a/tests/Models/2QACategoryMapperTest.php b/tests/Models/2QACategoryMapperTest.php
new file mode 100644
index 0000000..b818826
--- /dev/null
+++ b/tests/Models/2QACategoryMapperTest.php
@@ -0,0 +1,73 @@
+<?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\QA\tests\Models;
+
+use Modules\QA\Models\NullQACategory;
+use Modules\QA\Models\QACategory;
+use Modules\QA\Models\QACategoryMapper;
+use phpOMS\Utils\RnG\Text;
+
+/**
+ * @internal
+ */
+class QACategoryMapperTest extends \PHPUnit\Framework\TestCase
+{
+    public function testCRUD() : void
+    {
+        $category = new QACategory();
+
+        $category->setName('Test Category');
+
+        $id = QACategoryMapper::create($category);
+        self::assertGreaterThan(0, $category->getId());
+        self::assertEquals($id, $category->getId());
+
+        $categoryR = QACategoryMapper::get($category->getId());
+        self::assertEquals($category->getName(), $categoryR->getName());
+    }
+
+    public function testChildCRUD() : void
+    {
+        $category = new QACategory();
+
+        $category->setName('Test Category2');
+        $category->setParent(new NullQACategory(1));
+
+        $id = QACategoryMapper::create($category);
+        self::assertGreaterThan(0, $category->getId());
+        self::assertEquals($id, $category->getId());
+
+        $categoryR = QACategoryMapper::get($category->getId());
+        self::assertEquals($category->getName(), $categoryR->getName());
+        self::assertEquals($category->getParent()->getId(), $categoryR->getParent()->getId());
+    }
+
+    /**
+     * @group volume
+     * @group module
+     * @coversNothing
+     */
+    public function testVolume() : void
+    {
+        for ($i = 1; $i < 30; ++$i) {
+            $text     = new Text();
+            $category = new QACategory();
+
+            $category->setName($text->generateText(\mt_rand(1, 3)));
+
+            $id = QACategoryMapper::create($category);
+        }
+    }
+}
diff --git a/tests/Models/3QAQuestionMapperTest.php b/tests/Models/3QAQuestionMapperTest.php
new file mode 100644
index 0000000..2f7cbb4
--- /dev/null
+++ b/tests/Models/3QAQuestionMapperTest.php
@@ -0,0 +1,74 @@
+<?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\QA\tests\Models;
+
+use Modules\Admin\Models\NullAccount;
+use Modules\QA\Models\NullQACategory;
+use Modules\QA\Models\QAQuestion;
+use Modules\QA\Models\QAQuestionMapper;
+use Modules\QA\Models\QAQuestionStatus;
+use phpOMS\Utils\RnG\Text;
+
+/**
+ * @internal
+ */
+class QAQuestionMapperTest extends \PHPUnit\Framework\TestCase
+{
+    public function testCRUD() : void
+    {
+        $question = new QAQuestion();
+
+        $question->setName('Question Name');
+        $question->setQuestion('Question content');
+        $question->setStatus(QAQuestionStatus::ACTIVE);
+        $question->setCategory(new NullQACategory(1));
+        $question->setCreatedBy(new NullAccount(1));
+        $question->setLanguage('en');
+
+        $id = QAQuestionMapper::create($question);
+        self::assertGreaterThan(0, $question->getId());
+        self::assertEquals($id, $question->getId());
+
+        $questionR = QAQuestionMapper::get($question->getId());
+        self::assertEquals($question->getName(), $questionR->getName());
+        self::assertEquals($question->getQuestion(), $questionR->getQuestion());
+        self::assertEquals($question->getStatus(), $questionR->getStatus());
+        self::assertEquals($question->getLanguage(), $questionR->getLanguage());
+        self::assertEquals($question->getCategory()->getId(), $questionR->getCategory()->getId());
+        self::assertEquals($question->getCreatedBy()->getId(), $questionR->getCreatedBy()->getId());
+    }
+
+    /**
+     * @group volume
+     * @group module
+     * @coversNothing
+     */
+    public function testVolume() : void
+    {
+        for ($i = 1; $i < 30; ++$i) {
+            $text     = new Text();
+            $question = new QAQuestion();
+
+            $question->setName($text->generateText(\mt_rand(1, 3)));
+            $question->setQuestion($text->generateText(\mt_rand(100, 500)));
+            $question->setStatus(QAQuestionStatus::ACTIVE);
+            $question->setCategory(new NullQACategory(\mt_rand(1, 9)));
+            $question->setCreatedBy(new NullAccount(1));
+            $question->setLanguage('en');
+
+            $id = QAQuestionMapper::create($question);
+        }
+    }
+}
diff --git a/tests/Models/4QAAnswerMapperTest.php b/tests/Models/4QAAnswerMapperTest.php
new file mode 100644
index 0000000..3c46870
--- /dev/null
+++ b/tests/Models/4QAAnswerMapperTest.php
@@ -0,0 +1,70 @@
+<?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\QA\tests\Models;
+
+use Modules\Admin\Models\NullAccount;
+use Modules\QA\Models\NullQAQuestion;
+use Modules\QA\Models\QAAnswer;
+use Modules\QA\Models\QAAnswerMapper;
+use Modules\QA\Models\QAAnswerStatus;
+use phpOMS\Utils\RnG\Text;
+
+/**
+ * @internal
+ */
+class QAAnswerMapperTest extends \PHPUnit\Framework\TestCase
+{
+    public function testCRUD() : void
+    {
+        $answer = new QAAnswer();
+
+        $answer->setAnswer('Answer content');
+        $answer->setStatus(QAAnswerStatus::ACTIVE);
+        $answer->setCreatedBy(new NullAccount(1));
+        $answer->setQuestion(new NullQAQuestion(1));
+        $answer->setAccepted(true);
+
+        $id = QAAnswerMapper::create($answer);
+        self::assertGreaterThan(0, $answer->getId());
+        self::assertEquals($id, $answer->getId());
+
+        $answerR = QAAnswerMapper::get($answer->getId());
+        self::assertEquals($answer->getAnswer(), $answerR->getAnswer());
+        self::assertEquals($answer->getQuestion()->getId(), $answerR->getQuestion()->getId());
+        self::assertEquals($answer->getStatus(), $answerR->getStatus());
+        self::assertEquals($answer->isAccepted(), $answerR->isAccepted());
+        self::assertEquals($answer->getCreatedBy()->getId(), $answerR->getCreatedBy()->getId());
+    }
+
+    /**
+     * @group volume
+     * @group module
+     * @coversNothing
+     */
+    public function testVolume() : void
+    {
+        for ($i = 1; $i < 30; ++$i) {
+            $text   = new Text();
+            $answer = new QAAnswer();
+
+            $answer->setAnswer($text->generateText(\mt_rand(100, 500)));
+            $answer->setCreatedBy(new NullAccount(1));
+            $answer->setStatus(QAAnswerStatus::ACTIVE);
+            $answer->setQuestion(new NullQAQuestion(1));
+
+            $id = QAAnswerMapper::create($answer);
+        }
+    }
+}
diff --git a/tests/Models/QAAnswerTest.php b/tests/Models/QAAnswerTest.php
new file mode 100644
index 0000000..416e067
--- /dev/null
+++ b/tests/Models/QAAnswerTest.php
@@ -0,0 +1,56 @@
+<?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\QA\tests\Models;
+
+use Modules\Admin\Models\NullAccount;
+use Modules\QA\Models\NullQAQuestion;
+use Modules\QA\Models\QAAnswer;
+use Modules\QA\Models\QAAnswerStatus;
+
+/**
+ * @internal
+ */
+class QAAnswerTest extends \PHPUnit\Framework\TestCase
+{
+    public function testDefault() : void
+    {
+        $answer = new QAAnswer();
+
+        self::assertEquals(0, $answer->getId());
+        self::assertEquals('', $answer->getAnswer());
+        self::assertEquals(0, $answer->getQuestion()->getId());
+        self::assertFalse($answer->isAccepted());
+        self::assertEquals(QAAnswerStatus::ACTIVE, $answer->getStatus());
+        self::assertEquals(0, $answer->getCreatedBy()->getId());
+        self::assertInstanceOf('\DateTime', $answer->getCreatedAt());
+    }
+
+    public function testSetGet() : void
+    {
+        $answer = new QAAnswer();
+
+        $answer->setAnswer('Answer content');
+        $answer->setStatus(QAAnswerStatus::ACTIVE);
+        $answer->setQuestion(new NullQAQuestion(3));
+        $answer->setCreatedBy(new NullAccount(1));
+        $answer->setAccepted(true);
+
+        self::assertEquals('Answer content', $answer->getAnswer());
+        self::assertEquals(QAAnswerStatus::ACTIVE, $answer->getStatus());
+        self::assertEquals(1, $answer->getCreatedBy()->getId());
+        self::assertEquals(3, $answer->getQuestion()->getId());
+        self::assertTrue($answer->isAccepted());
+    }
+}
diff --git a/tests/Models/QACategoryTest.php b/tests/Models/QACategoryTest.php
new file mode 100644
index 0000000..34f1b72
--- /dev/null
+++ b/tests/Models/QACategoryTest.php
@@ -0,0 +1,44 @@
+<?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\QA\tests\Models;
+
+use Modules\QA\Models\NullQACategory;
+use Modules\QA\Models\QACategory;
+
+/**
+ * @internal
+ */
+class QACategoryTest extends \PHPUnit\Framework\TestCase
+{
+    public function testDefault() : void
+    {
+        $category = new QACategory();
+
+        self::assertEquals(0, $category->getId());
+        self::assertEquals('', $category->getName());
+        self::assertNull($category->getParent());
+    }
+
+    public function testSetGet() : void
+    {
+        $category = new QACategory();
+
+        $category->setName('Category Name');
+        $category->setParent(new NullQACategory(1));
+
+        self::assertEquals('Category Name', $category->getName());
+        self::assertEquals(1, $category->getParent()->getId());
+    }
+}
diff --git a/tests/Models/QAQuestionTest.php b/tests/Models/QAQuestionTest.php
new file mode 100644
index 0000000..563c903
--- /dev/null
+++ b/tests/Models/QAQuestionTest.php
@@ -0,0 +1,60 @@
+<?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\QA\tests\Models;
+
+use Modules\Admin\Models\NullAccount;
+use Modules\QA\Models\NullQACategory;
+use Modules\QA\Models\QAQuestion;
+use Modules\QA\Models\QAQuestionStatus;
+
+/**
+ * @internal
+ */
+class QAQuestionTest extends \PHPUnit\Framework\TestCase
+{
+    public function testDefault() : void
+    {
+        $question = new QAQuestion();
+
+        self::assertEquals(0, $question->getId());
+        self::assertEquals('', $question->getName());
+        self::assertEquals('', $question->getQuestion());
+        self::assertEquals(QAQuestionStatus::ACTIVE, $question->getStatus());
+        self::assertEquals(0, $question->getCategory()->getId());
+        self::assertEquals('', $question->getLanguage());
+        self::assertEquals(0, $question->getCreatedBy()->getId());
+        self::assertInstanceOf('\DateTime', $question->getCreatedAt());
+        self::assertEquals([], $question->getBadges());
+    }
+
+    public function testSetGet() : void
+    {
+        $question = new QAQuestion();
+
+        $question->setName('Question Name');
+        $question->setQuestion('Question content');
+        $question->setStatus(QAQuestionStatus::ACTIVE);
+        $question->setCategory(new NullQACategory(1));
+        $question->setCreatedBy(new NullAccount(1));
+        $question->setLanguage('en');
+
+        self::assertEquals('Question Name', $question->getName());
+        self::assertEquals('Question content', $question->getQuestion());
+        self::assertEquals(QAQuestionStatus::ACTIVE, $question->getStatus());
+        self::assertEquals('en', $question->getLanguage());
+        self::assertEquals(1, $question->getCategory()->getId());
+        self::assertEquals(1, $question->getCreatedBy()->getId());
+    }
+}