diff --git a/Iterator/SortableIterator.php b/Iterator/SortableIterator.php
index 74c8db26..2e51f36a 100644
--- a/Iterator/SortableIterator.php
+++ b/Iterator/SortableIterator.php
@@ -30,8 +30,7 @@ class SortableIterator implements \IteratorAggregate
     private $sort;
 
     /**
-     * @param \Traversable $iterator The Iterator to filter
-     * @param int|callable $sort     The sort type (SORT_BY_NAME, SORT_BY_TYPE, or a PHP callback)
+     * @param int|callable $sort The sort type (SORT_BY_NAME, SORT_BY_TYPE, or a PHP callback)
      *
      * @throws \InvalidArgumentException
      */
diff --git a/Tests/Iterator/SortableIteratorTest.php b/Tests/Iterator/SortableIteratorTest.php
index 12eacb86..098cd756 100644
--- a/Tests/Iterator/SortableIteratorTest.php
+++ b/Tests/Iterator/SortableIteratorTest.php
@@ -18,7 +18,7 @@ class SortableIteratorTest extends RealIteratorTestCase
     public function testConstructor()
     {
         try {
-            new SortableIterator(new Iterator([]), 'foobar');
+            new SortableIterator(new Iterator([]), -255);
             $this->fail('__construct() throws an \InvalidArgumentException exception if the mode is not valid');
         } catch (\Exception $e) {
             $this->assertInstanceOf(\InvalidArgumentException::class, $e, '__construct() throws an \InvalidArgumentException exception if the mode is not valid');