diff --git a/application/src/Entity/Attribut/CollectionAttribut.php b/application/src/Entity/Attribut/CollectionAttribut.php
new file mode 100644
index 0000000..8e0678b
--- /dev/null
+++ b/application/src/Entity/Attribut/CollectionAttribut.php
@@ -0,0 +1,29 @@
+<?php
+
+namespace App\Entity\Attribut;
+
+use Doctrine\Common\Collections\Collection;
+
+trait CollectionAttribut
+{
+    /**
+     * @var Collection
+     */
+    protected $collection;
+
+    /**
+     * @return Collection
+     */
+    public function getCollection(): Collection
+    {
+        return $this->collection;
+    }
+
+    /**
+     * @param Collection $collection
+     */
+    public function setCollection(Collection $collection): void
+    {
+        $this->collection = $collection;
+    }
+}
diff --git a/application/src/Entity/Attribut/CollectionAttributInterface.php b/application/src/Entity/Attribut/CollectionAttributInterface.php
new file mode 100644
index 0000000..6889cde
--- /dev/null
+++ b/application/src/Entity/Attribut/CollectionAttributInterface.php
@@ -0,0 +1,12 @@
+<?php
+
+namespace App\Entity\Attribut;
+
+use Doctrine\Common\Collections\Collection;
+
+interface CollectionAttributInterface
+{
+    public function getCollection(): Collection;
+
+    public function setCollection(Collection $collection): void;
+}
diff --git a/application/tests/Unit/Entity/Attribut/CollectionAttributTest.php b/application/tests/Unit/Entity/Attribut/CollectionAttributTest.php
new file mode 100644
index 0000000..fc2eb78
--- /dev/null
+++ b/application/tests/Unit/Entity/Attribut/CollectionAttributTest.php
@@ -0,0 +1,36 @@
+<?php
+
+namespace Tests\Unit\Entity\Attribut;
+
+use PHPUnit\Framework\TestCase;
+use App\Entity\Attribut\CollectionAttributInterface;
+use App\Entity\Attribut\CollectionAttribut;
+use Doctrine\Common\Collections\ArrayCollection;
+
+class CollectionAttributTest extends TestCase
+{
+    /**
+     * @var CollectionAttributInterface
+     */
+    protected $collection;
+
+    public function setUp(): void
+    {
+        $this->collection = new class() implements CollectionAttributInterface {
+            use CollectionAttribut;
+        };
+    }
+
+    public function testConstructor(): void
+    {
+        $this->expectException(\TypeError::class);
+        $this->collection->getCollection();
+    }
+
+    public function testAccessors(): void
+    {
+        $collection = new ArrayCollection();
+        $this->assertNull($this->collection->setCollection($collection));
+        $this->assertEquals($collection, $this->collection->getCollection());
+    }
+}