diff --git a/src/DigiSignClient.php b/src/DigiSignClient.php
index a8fa00f..80dad6b 100644
--- a/src/DigiSignClient.php
+++ b/src/DigiSignClient.php
@@ -138,7 +138,7 @@ private function createUri(string $uri, array $options): UriInterface
     {
         // replace uri parameters with its values
         preg_match_all('/{(\w+)}/', $uri, $matches);
-        $searches = $matches[1] ?? [];
+        $searches = $matches[1];
         $replaces = [];
 
         foreach ($searches as $search) {
diff --git a/src/Endpoint/BatchSendingItemsEndpoint.php b/src/Endpoint/BatchSendingItemsEndpoint.php
index c8567e8..af296ec 100644
--- a/src/Endpoint/BatchSendingItemsEndpoint.php
+++ b/src/Endpoint/BatchSendingItemsEndpoint.php
@@ -21,7 +21,12 @@ final class BatchSendingItemsEndpoint extends ResourceEndpoint
 
     public function __construct(BatchSendingsEndpoint $parent, BatchSending|string $batchSending)
     {
-        parent::__construct($parent, '/{id}/items', BatchSendingItem::class, ['id' => $batchSending]);
+        parent::__construct(
+            $parent,
+            '/{batchSending}/items',
+            BatchSendingItem::class,
+            ['batchSending' => $batchSending],
+        );
     }
 
     /**
diff --git a/tests/Endpoint/BatchSendingItemsEndpointTest.php b/tests/Endpoint/BatchSendingItemsEndpointTest.php
index 5e29671..af4ac58 100644
--- a/tests/Endpoint/BatchSendingItemsEndpointTest.php
+++ b/tests/Endpoint/BatchSendingItemsEndpointTest.php
@@ -12,16 +12,16 @@ class BatchSendingItemsEndpointTest extends EndpointTestCase
     public function testImport(): void
     {
         self::endpoint()->import(['file' => 'bar']);
-        self::assertLastRequest('POST', "/api/batch-sendings/foo/items/import", ['file' => 'bar']);
+        self::assertLastRequest('POST', "/api/batch-sendings/bar/items/import", ['file' => 'bar']);
     }
 
     public function testCRUD(): void
     {
-        self::assertCrudRequests(self::endpoint(), '/api/batch-sendings/foo/items');
+        self::assertCrudRequests(self::endpoint(), '/api/batch-sendings/bar/items');
     }
 
     protected static function endpoint(): BatchSendingItemsEndpoint
     {
-        return self::dgs()->batchSendings()->items('foo');
+        return self::dgs()->batchSendings()->items('bar');
     }
 }