diff --git a/tests/Models/NullInformBlacklistTest.php b/tests/Models/NullInformBlacklistTest.php
new file mode 100644
index 0000000..50043ec
--- /dev/null
+++ b/tests/Models/NullInformBlacklistTest.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\OnlineResourceWatcher\tests\Models;
+
+use Modules\OnlineResourceWatcher\Models\NullInformBlacklist;
+
+/**
+ * @internal
+ */
+final class NullInformBlacklistTest extends \PHPUnit\Framework\TestCase
+{
+    /**
+     * @covers Modules\OnlineResourceWatcher\Models\NullInformBlacklist
+     * @group framework
+     */
+    public function testNull() : void
+    {
+        self::assertInstanceOf('\Modules\OnlineResourceWatcher\Models\InformBlacklist', new NullInformBlacklist());
+    }
+
+    /**
+     * @covers Modules\OnlineResourceWatcher\Models\NullInformBlacklist
+     * @group framework
+     */
+    public function testId() : void
+    {
+        $null = new NullInformBlacklist(2);
+        self::assertEquals(2, $null->getId());
+    }
+
+    /**
+     * @covers Modules\OnlineResourceWatcher\Models\NullInformBlacklist
+     * @group framework
+     */
+    public function testJsonSerialize() : void
+    {
+        $null = new NullInformBlacklist(2);
+        self::assertEquals(['id' => 2], $null);
+    }
+}
diff --git a/tests/Models/NullInformTest.php b/tests/Models/NullInformTest.php
new file mode 100644
index 0000000..1027237
--- /dev/null
+++ b/tests/Models/NullInformTest.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\OnlineResourceWatcher\tests\Models;
+
+use Modules\OnlineResourceWatcher\Models\NullInform;
+
+/**
+ * @internal
+ */
+final class NullInformTest extends \PHPUnit\Framework\TestCase
+{
+    /**
+     * @covers Modules\OnlineResourceWatcher\Models\NullInform
+     * @group framework
+     */
+    public function testNull() : void
+    {
+        self::assertInstanceOf('\Modules\OnlineResourceWatcher\Models\Inform', new NullInform());
+    }
+
+    /**
+     * @covers Modules\OnlineResourceWatcher\Models\NullInform
+     * @group framework
+     */
+    public function testId() : void
+    {
+        $null = new NullInform(2);
+        self::assertEquals(2, $null->getId());
+    }
+
+    /**
+     * @covers Modules\OnlineResourceWatcher\Models\NullInform
+     * @group framework
+     */
+    public function testJsonSerialize() : void
+    {
+        $null = new NullInform(2);
+        self::assertEquals(['id' => 2], $null);
+    }
+}
diff --git a/tests/Models/NullReportTest.php b/tests/Models/NullReportTest.php
new file mode 100644
index 0000000..17e8813
--- /dev/null
+++ b/tests/Models/NullReportTest.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\OnlineResourceWatcher\tests\Models;
+
+use Modules\OnlineResourceWatcher\Models\NullReport;
+
+/**
+ * @internal
+ */
+final class NullReportTest extends \PHPUnit\Framework\TestCase
+{
+    /**
+     * @covers Modules\OnlineResourceWatcher\Models\NullReport
+     * @group framework
+     */
+    public function testNull() : void
+    {
+        self::assertInstanceOf('\Modules\OnlineResourceWatcher\Models\Report', new NullReport());
+    }
+
+    /**
+     * @covers Modules\OnlineResourceWatcher\Models\NullReport
+     * @group framework
+     */
+    public function testId() : void
+    {
+        $null = new NullReport(2);
+        self::assertEquals(2, $null->getId());
+    }
+
+    /**
+     * @covers Modules\OnlineResourceWatcher\Models\NullReport
+     * @group framework
+     */
+    public function testJsonSerialize() : void
+    {
+        $null = new NullReport(2);
+        self::assertEquals(['id' => 2], $null);
+    }
+}
diff --git a/tests/Models/NullResourceTest.php b/tests/Models/NullResourceTest.php
new file mode 100644
index 0000000..dba4f2d
--- /dev/null
+++ b/tests/Models/NullResourceTest.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\OnlineResourceWatcher\tests\Models;
+
+use Modules\OnlineResourceWatcher\Models\NullResource;
+
+/**
+ * @internal
+ */
+final class NullResourceTest extends \PHPUnit\Framework\TestCase
+{
+    /**
+     * @covers Modules\OnlineResourceWatcher\Models\NullResource
+     * @group framework
+     */
+    public function testNull() : void
+    {
+        self::assertInstanceOf('\Modules\OnlineResourceWatcher\Models\Resource', new NullResource());
+    }
+
+    /**
+     * @covers Modules\OnlineResourceWatcher\Models\NullResource
+     * @group framework
+     */
+    public function testId() : void
+    {
+        $null = new NullResource(2);
+        self::assertEquals(2, $null->getId());
+    }
+
+    /**
+     * @covers Modules\OnlineResourceWatcher\Models\NullResource
+     * @group framework
+     */
+    public function testJsonSerialize() : void
+    {
+        $null = new NullResource(2);
+        self::assertEquals(['id' => 2], $null);
+    }
+}