diff --git a/tests/Unit/MongoTransportTest.php b/tests/Unit/MongoTransportTest.php
index a022558..6b7fd73 100644
--- a/tests/Unit/MongoTransportTest.php
+++ b/tests/Unit/MongoTransportTest.php
@@ -8,6 +8,7 @@
 use EmagTechLabs\MessengerMongoBundle\Tests\Unit\Fixtures\HelloMessage;
 use MongoDB\BSON\ObjectId;
 use MongoDB\Collection;
+use MongoDB\InsertOneResult;
 use PHPUnit\Framework\Attributes\Test;
 use PHPUnit\Framework\TestCase;
 use Symfony\Component\Messenger\Envelope;
@@ -263,6 +264,12 @@ public function __construct()
             public function insertOne($document, array $options = [])
             {
                 $this->documents[] = $document;
+
+                return new class extends InsertOneResult {
+                    public function __construct()
+                    {
+                    }
+                };
             }
         };
     }