diff --git a/.gitignore b/.gitignore
index f02ac67..06b22f1 100644
--- a/.gitignore
+++ b/.gitignore
@@ -10,3 +10,4 @@ phpunit.xml
 Thumbs.db
 .php_cs.cache
 .php-cs-fixer.cache
+phpunit.log.xml
diff --git a/composer.json b/composer.json
index 9205715..643f7b2 100644
--- a/composer.json
+++ b/composer.json
@@ -25,13 +25,20 @@
     "optimistdigital/nova-locale-field": "^2.0"
   },
   "require-dev": {
-    "friendsofphp/php-cs-fixer": "^3.0"
+    "friendsofphp/php-cs-fixer": "^3.0",
+    "orchestra/testbench": "^6.20.1",
+    "phpunit/phpunit": "^9.3.3"
   },
   "autoload": {
     "psr-4": {
       "Novius\\LaravelNovaMenu\\": "src/"
     }
   },
+  "autoload-dev": {
+    "psr-4": {
+      "Novius\\LaravelNovaMenu\\Tests\\": "tests/"
+    }
+  },
   "extra": {
     "laravel": {
       "providers": [
@@ -42,7 +49,8 @@
   "scripts": {
     "lint": [
       "php-cs-fixer fix --config .php-cs-fixer.php -vv --diff --allow-risky=yes --dry-run"
-    ]
+    ],
+    "test": "vendor/bin/phpunit --verbose --log-junit phpunit.log.xml"
   },
   "config": {
     "sort-packages": true
diff --git a/phpunit.xml.dist b/phpunit.xml.dist
new file mode 100644
index 0000000..e4bf649
--- /dev/null
+++ b/phpunit.xml.dist
@@ -0,0 +1,27 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<phpunit bootstrap="vendor/autoload.php"
+         backupGlobals="false"
+         backupStaticAttributes="false"
+         colors="true"
+         verbose="true"
+         convertErrorsToExceptions="true"
+         convertNoticesToExceptions="true"
+         convertWarningsToExceptions="true"
+         processIsolation="true"
+         stopOnFailure="false">
+    <testsuites>
+        <testsuite name="Feature">
+            <directory suffix="Test.php">./tests/Feature</directory>
+        </testsuite>
+    </testsuites>
+    <filter>
+        <whitelist>
+            <directory suffix=".php">src/</directory>
+        </whitelist>
+    </filter>
+    <php>
+        <server name="APP_ENV" value="testing"/>
+        <server name="APP_DEBUG" value="false"/>
+        <server name="APP_KEY" value="01234567890123456789012345678932"/>
+    </php>
+</phpunit>
diff --git a/src/LaravelNovaMenuServiceProvider.php b/src/LaravelNovaMenuServiceProvider.php
index 00a44e6..8ff82de 100644
--- a/src/LaravelNovaMenuServiceProvider.php
+++ b/src/LaravelNovaMenuServiceProvider.php
@@ -19,14 +19,19 @@ public function boot()
     {
         $this->app->booted(function () {
             $this->routes();
-            Nova::resources(config('laravel-nova-menu.resources', []));
-        });
 
-        Nova::serving(function (ServingNova $event) {
-            Nova::script('laravel-nova-menu', __DIR__.'/../dist/js/tool.js');
-            Nova::style('laravel-nova-menu', __DIR__.'/../dist/css/tool.css');
+            if (!$this->app->runningUnitTests()) {
+                Nova::resources(config('laravel-nova-menu.resources', []));
+            }
         });
 
+        if (!$this->app->runningUnitTests()) {
+            Nova::serving(function (ServingNova $event) {
+                Nova::script('laravel-nova-menu', __DIR__.'/../dist/js/tool.js');
+                Nova::style('laravel-nova-menu', __DIR__.'/../dist/css/tool.css');
+            });
+        }
+
         $packageDir = dirname(__DIR__);
 
         $this->publishes([$packageDir.'/config' => config_path()], 'config');
diff --git a/src/Observers/ItemObserver.php b/src/Observers/ItemObserver.php
index ba798f8..d4761d8 100644
--- a/src/Observers/ItemObserver.php
+++ b/src/Observers/ItemObserver.php
@@ -72,6 +72,8 @@ protected function cleanModel(MenuItem $item)
 
             if (request()->get('link_type') === MenuItem::TYPE_EMPTY) {
                 $item->{menuItem::linkTypesAttributes()[MenuItem::TYPE_EMPTY]} = 1;
+            } else {
+                $item->{menuItem::linkTypesAttributes()[MenuItem::TYPE_EMPTY]} = 0;
             }
 
             unset($item->link_type);
diff --git a/tests/Feature/ItemObserverTest.php b/tests/Feature/ItemObserverTest.php
new file mode 100644
index 0000000..d520862
--- /dev/null
+++ b/tests/Feature/ItemObserverTest.php
@@ -0,0 +1,122 @@
+<?php
+
+namespace Novius\LaravelNovaMenu\Tests\Feature;
+
+use Novius\LaravelNovaMenu\Models\Menu;
+use Novius\LaravelNovaMenu\Models\MenuItem;
+use Novius\LaravelNovaMenu\Tests\TestCase;
+
+class ItemObserverTest extends TestCase
+{
+    protected Menu $menu;
+
+    public function setUp(): void
+    {
+        parent::setUp();
+
+        $this->menu = $this->createMenu();
+    }
+
+    /** @test */
+    public function createExternalLinkTest()
+    {
+        request()->merge([
+            'link_type' => MenuItem::TYPE_EXTERNAL_LINK,
+        ]);
+        $linkValue = 'https://www.novius.fr';
+
+        $link = new MenuItem();
+        $link->name = 'Test external';
+        $link->menu_id = $this->menu->id;
+        $link->external_link = $linkValue;
+        $link->internal_link = 'should_be_null_after_saved';
+        $link->html = 'should_be_null_after_saved';
+        $link->is_empty_link = 1;
+        $link->save();
+
+        $this->assertNull($link->internal_link);
+        $this->assertNull($link->html);
+        $this->assertEquals(0, $link->is_empty_link);
+        $this->assertEquals($link->external_link, $linkValue);
+    }
+
+    /** @test */
+    public function createInternalLinkTest()
+    {
+        request()->merge([
+            'link_type' => MenuItem::TYPE_INTERNAL_LINK,
+        ]);
+        $linkValue = 'linkable_route:contact';
+
+        $link = new MenuItem();
+        $link->name = 'Test internal';
+        $link->menu_id = $this->menu->id;
+        $link->external_link = 'should_be_null_after_saved';
+        $link->is_empty_link = 1;
+        $link->html = 'should_be_null_after_saved';
+        $link->internal_link = $linkValue;
+        $link->save();
+
+        $this->assertNull($link->external_link);
+        $this->assertNull($link->html);
+        $this->assertEquals(0, $link->is_empty_link);
+        $this->assertEquals($link->internal_link, $linkValue);
+    }
+
+    /** @test */
+    public function createEmptyLinkTest()
+    {
+        request()->merge([
+            'link_type' => MenuItem::TYPE_EMPTY,
+        ]);
+
+        $link = new MenuItem();
+        $link->name = 'Test empty link';
+        $link->menu_id = $this->menu->id;
+        $link->is_empty_link = 1;
+        $link->external_link = 'should_be_null_after_saved';
+        $link->html = 'should_be_null_after_saved';
+        $link->internal_link = 'should_be_null_after_saved';
+        $link->save();
+
+        $this->assertNull($link->external_link);
+        $this->assertNull($link->internal_link);
+        $this->assertNull($link->html);
+        $this->assertEquals(1, $link->is_empty_link);
+    }
+
+    /** @test */
+    public function createHtmlLinkTest()
+    {
+        request()->merge([
+            'link_type' => MenuItem::TYPE_HTML,
+        ]);
+
+        $html = '<div>test</div>';
+
+        $link = new MenuItem();
+        $link->name = 'Test html link';
+        $link->menu_id = $this->menu->id;
+        $link->html = $html;
+        $link->is_empty_link = 1;
+        $link->external_link = 'should_be_null_after_saved';
+        $link->internal_link = 'should_be_null_after_saved';
+        $link->save();
+
+        $this->assertNull($link->external_link);
+        $this->assertNull($link->internal_link);
+        $this->assertEquals(0, $link->is_empty_link);
+        $this->assertEquals($link->html, $html);
+    }
+
+    protected function createMenu(): Menu
+    {
+        $menu = new Menu();
+        $menu->name = 'Test menu';
+        if (!$menu->save()) {
+            throw new \Exception('Unable to save menu.');
+        }
+
+        return $menu;
+    }
+}
diff --git a/tests/TestCase.php b/tests/TestCase.php
new file mode 100644
index 0000000..4c86c0d
--- /dev/null
+++ b/tests/TestCase.php
@@ -0,0 +1,54 @@
+<?php
+
+namespace Novius\LaravelNovaMenu\Tests;
+
+use Illuminate\Support\Facades\Artisan;
+use Novius\LaravelNovaMenu\LaravelNovaMenuServiceProvider;
+use Orchestra\Testbench\TestCase as Orchestra;
+
+abstract class TestCase extends Orchestra
+{
+    public function setUp(): void
+    {
+        parent::setUp();
+
+        Artisan::call('migrate');
+    }
+
+    /**
+     * @param \Illuminate\Foundation\Application $app
+     *
+     * @return array
+     */
+    protected function getPackageProviders($app)
+    {
+        return [
+            LaravelNovaMenuServiceProvider::class,
+        ];
+    }
+
+    /**
+     * @param \Illuminate\Foundation\Application $app
+     */
+    protected function getEnvironmentSetUp($app)
+    {
+        $app['config']->set('database.default', 'sqlite');
+        $app['config']->set('database.connections.sqlite', [
+            'driver' => 'sqlite',
+            'database' => ':memory:',
+            'prefix' => '',
+        ]);
+
+        $app['config']->set('sluggable', [
+            'onUpdate' => false,
+            'separator' => '-',
+            'method' => null,
+            'maxLength' => null,
+            'maxLengthKeepWords' => true,
+            'slugEngineOptions' => [],
+            'reserved' => null,
+            'unique' => true,
+            'includeTrashed' => false,
+        ]);
+    }
+}