diff --git a/lib/GaletteAuto/Model.php b/lib/GaletteAuto/Model.php
index 1cacc69..b571a7a 100644
--- a/lib/GaletteAuto/Model.php
+++ b/lib/GaletteAuto/Model.php
@@ -45,8 +45,9 @@ class Model
     protected string $model;
     protected Brand $brand;
 
-    private $errors;
-    private $zdb;
+    /** @var string[] */
+    private array $errors;
+    private Db $zdb;
 
     /**
      * Default constructor
@@ -228,7 +229,7 @@ public function check(array $post): bool
     /**
      * Get errors
      *
-     * @return array
+     * @return string[]
      */
     public function getErrors(): array
     {
diff --git a/tests/GaletteAuto/tests/units/Model.php b/tests/GaletteAuto/tests/units/Model.php
new file mode 100644
index 0000000..c6e49c9
--- /dev/null
+++ b/tests/GaletteAuto/tests/units/Model.php
@@ -0,0 +1,143 @@
+<?php
+
+/**
+ * Copyright © 2003-2024 The Galette Team
+ *
+ * This file is part of Galette (https://galette.eu).
+ *
+ * Galette is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Galette is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Galette. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+namespace GaletteAuto\tests\units;
+
+use Galette\GaletteTestCase;
+
+/**
+ * Model tests
+ *
+ * @author Johan Cwiklinski <johan@x-tnd.be>
+ */
+class Model extends GaletteTestCase
+{
+    protected int $seed = 20240130141727;
+
+    /**
+     * Test empty
+     *
+     * @return void
+     */
+    public function testEmpty(): void
+    {
+        /*$brand = new \GaletteAuto\Brand($this->zdb);
+        $this->assertSame('Brand', $brand->getFieldLabel());
+
+        $this->assertCount(0, $brand->getList());
+        $this->assertSame('0 brand', $brand->displayCount());*/
+    }
+
+    /**
+     * Test add and update
+     *
+     * @return void
+     */
+    public function testCrud(): void
+    {
+        $brand = new \GaletteAuto\Brand($this->zdb);
+        //Add new brand
+        $brand->value = 'Audi';
+        $this->assertTrue($brand->store(true));
+        $first_brand_id = $brand->id;
+
+        //add another brand
+        $brand = new \GaletteAuto\Brand($this->zdb);
+        $brand->value = 'Mercedes';
+        $this->assertTrue($brand->store(true));
+        $second_brand_id = $brand->id;
+
+        $this->assertCount(2, $brand->getList());
+
+        $model = new \GaletteAuto\Model($this->zdb);
+        $this->assertCount(0, $model->getList());
+
+        $data = [];
+        $this->assertFalse($model->check($data));
+        $this->assertSame(
+            [
+                "- You must select a brand!",
+                "- You must provide a value!"
+            ],
+            $model->getErrors()
+        );
+
+        $data = [
+            'model' => 'A3'
+        ];
+        $this->assertFalse($model->check($data));
+        $this->assertSame(
+            [
+                "- You must select a brand!"
+            ],
+            $model->getErrors()
+        );
+
+        $data = [
+            'brand' => $first_brand_id
+        ];
+        $this->assertFalse($model->check($data));
+        $this->assertSame(
+            [
+                "- You must provide a value!"
+            ],
+            $model->getErrors()
+        );
+
+        $data = [
+            'model' => 'A3',
+            'brand' => $first_brand_id,
+        ];
+        $this->assertTrue($model->check($data));
+        $this->assertTrue($model->store(true));
+
+        $this->assertCount(1, $model->getList());
+
+        /*$this->assertCount(2, $brand->getList());
+        $this->assertSame('2 brands', $brand->displayCount());
+
+        $brand = new \GaletteAuto\Brand($this->zdb);
+        $this->assertTrue($brand->load($id));
+        $brand->value = 'Mercedes';
+        $this->assertTrue($brand->store());
+
+        $this->assertCount(2, $brand->getList());
+        $this->assertSame('2 brands', $brand->displayCount());
+
+        $brand = new \GaletteAuto\Brand($this->zdb);
+        $this->assertTrue($brand->delete([$first_id]));
+        $list = $brand->getList();
+        $this->assertCount(1, $list);
+        $last_brand = $list[0];
+        $this->assertSame($id, $last_brand->id_brand);*/
+    }
+
+    /**
+     * Test load error
+     *
+     * @return void
+     */
+    public function testLoadError(): void
+    {
+        $brand = new \GaletteAuto\Model($this->zdb);
+        $this->assertFalse($brand->load(999));
+    }
+}