diff --git a/tests/AbstractApiTestCase.php b/tests/AbstractApiTestCase.php
index 8b6a44f..ec2b8ae 100644
--- a/tests/AbstractApiTestCase.php
+++ b/tests/AbstractApiTestCase.php
@@ -284,11 +284,12 @@ abstract class AbstractApiTestCase extends ApiTestCase
         return $link;
     }
 
-    protected function createMachinePieceLink(Machine $machine, Piece $piece, ?MachineComponentLink $parentLink = null): MachinePieceLink
+    protected function createMachinePieceLink(Machine $machine, Piece $piece, ?MachineComponentLink $parentLink = null, int $quantity = 1): MachinePieceLink
     {
         $link = new MachinePieceLink();
         $link->setMachine($machine);
         $link->setPiece($piece);
+        $link->setQuantity($quantity);
         if (null !== $parentLink) {
             $link->setParentLink($parentLink);
         }
diff --git a/tests/Api/Entity/MachinePieceLinkTest.php b/tests/Api/Entity/MachinePieceLinkTest.php
index 994e8e4..34d36d1 100644
--- a/tests/Api/Entity/MachinePieceLinkTest.php
+++ b/tests/Api/Entity/MachinePieceLinkTest.php
@@ -85,6 +85,43 @@ class MachinePieceLinkTest extends AbstractApiTestCase
         ]);
     }
 
+    public function testPostWithQuantity(): void
+    {
+        $client  = $this->createGestionnaireClient();
+        $machine = $this->createMachine();
+        $piece   = $this->createPiece();
+
+        $client->request('POST', '/api/machine_piece_links', [
+            'headers' => ['Content-Type' => 'application/ld+json'],
+            'json'    => [
+                'machine'  => self::iri('machines', $machine->getId()),
+                'piece'    => self::iri('pieces', $piece->getId()),
+                'quantity' => 5,
+            ],
+        ]);
+
+        $this->assertResponseStatusCodeSame(201);
+        $this->assertJsonContains(['quantity' => 5]);
+    }
+
+    public function testPostDefaultQuantity(): void
+    {
+        $client  = $this->createGestionnaireClient();
+        $machine = $this->createMachine();
+        $piece   = $this->createPiece();
+
+        $client->request('POST', '/api/machine_piece_links', [
+            'headers' => ['Content-Type' => 'application/ld+json'],
+            'json'    => [
+                'machine' => self::iri('machines', $machine->getId()),
+                'piece'   => self::iri('pieces', $piece->getId()),
+            ],
+        ]);
+
+        $this->assertResponseStatusCodeSame(201);
+        $this->assertJsonContains(['quantity' => 1]);
+    }
+
     public function testDelete(): void
     {
         $machine = $this->createMachine('Machine A');