diff --git a/test/Model/Consignment/PostNLConsignmentTest.php b/test/Model/Consignment/PostNLConsignmentTest.php
index bdafb53c..56224ecc 100644
--- a/test/Model/Consignment/PostNLConsignmentTest.php
+++ b/test/Model/Consignment/PostNLConsignmentTest.php
@@ -31,6 +31,14 @@ public function providePostNLConsignmentsData(): array
                 self::expected(self::ONLY_RECIPIENT) => true,
                 self::expected(self::SIGNATURE)      => true,
             ],
+            'Letter' => [
+                self::PACKAGE_TYPE => AbstractConsignment::PACKAGE_TYPE_LETTER,
+                self::expected(self::DELIVERY_TYPE) => AbstractConsignment::DELIVERY_TYPE_STANDARD,
+            ],
+            'Small package' => [
+                self::PACKAGE_TYPE => AbstractConsignment::PACKAGE_TYPE_PACKAGE_SMALL,
+                self::expected(self::DELIVERY_TYPE) => AbstractConsignment::DELIVERY_TYPE_STANDARD,
+            ]
         ]);
     }