diff --git a/tests/Models/NullEmailL11nTest.php b/tests/Models/NullEmailL11nTest.php
new file mode 100644
index 0000000..e103c38
--- /dev/null
+++ b/tests/Models/NullEmailL11nTest.php
@@ -0,0 +1,52 @@
+<?php
+/**
+ * Jingga
+ *
+ * PHP Version 8.1
+ *
+ * @package   tests
+ * @copyright Dennis Eichhorn
+ * @license   OMS License 2.0
+ * @version   1.0.0
+ * @link      https://jingga.app
+ */
+declare(strict_types=1);
+
+namespace Modules\Messages\tests\Models;
+
+use Modules\Messages\Models\NullEmailL11n;
+
+/**
+ * @internal
+ */
+final class NullEmailL11nTest extends \PHPUnit\Framework\TestCase
+{
+    /**
+     * @covers Modules\Messages\Models\NullEmailL11n
+     * @group framework
+     */
+    public function testNull() : void
+    {
+        self::assertInstanceOf('\Modules\Messages\Models\EmailL11n', new NullEmailL11n());
+    }
+
+    /**
+     * @covers Modules\Messages\Models\NullEmailL11n
+     * @group framework
+     */
+    public function testId() : void
+    {
+        $null = new NullEmailL11n(2);
+        self::assertEquals(2, $null->getId());
+    }
+
+    /**
+     * @covers Modules\Messages\Models\NullEmailL11n
+     * @group framework
+     */
+    public function testJsonSerialize() : void
+    {
+        $null = new NullEmailL11n(2);
+        self::assertEquals(['id' => 2], $null);
+    }
+}
diff --git a/tests/Models/NullEmailTest.php b/tests/Models/NullEmailTest.php
new file mode 100644
index 0000000..86dd1ce
--- /dev/null
+++ b/tests/Models/NullEmailTest.php
@@ -0,0 +1,52 @@
+<?php
+/**
+ * Jingga
+ *
+ * PHP Version 8.1
+ *
+ * @package   tests
+ * @copyright Dennis Eichhorn
+ * @license   OMS License 2.0
+ * @version   1.0.0
+ * @link      https://jingga.app
+ */
+declare(strict_types=1);
+
+namespace Modules\Messages\tests\Models;
+
+use Modules\Messages\Models\NullEmail;
+
+/**
+ * @internal
+ */
+final class NullEmailTest extends \PHPUnit\Framework\TestCase
+{
+    /**
+     * @covers Modules\Messages\Models\NullEmail
+     * @group framework
+     */
+    public function testNull() : void
+    {
+        self::assertInstanceOf('\Modules\Messages\Models\Email', new NullEmail());
+    }
+
+    /**
+     * @covers Modules\Messages\Models\NullEmail
+     * @group framework
+     */
+    public function testId() : void
+    {
+        $null = new NullEmail(2);
+        self::assertEquals(2, $null->getId());
+    }
+
+    /**
+     * @covers Modules\Messages\Models\NullEmail
+     * @group framework
+     */
+    public function testJsonSerialize() : void
+    {
+        $null = new NullEmail(2);
+        self::assertEquals(['id' => 2], $null);
+    }
+}