diff --git a/src/SortableTrait.php b/src/SortableTrait.php
index f5c73dd..fc15668 100644
--- a/src/SortableTrait.php
+++ b/src/SortableTrait.php
@@ -46,7 +46,7 @@ public static function setNewOrder($ids, int $startOrder = 1, string $primaryKey
             throw new InvalidArgumentException('You must pass an array or ArrayAccess object to setNewOrder');
         }
 
-        $model = new static;
+        $model = new static();
 
         $orderColumnName = $model->determineOrderColumnName();
 
diff --git a/tests/SortableTest.php b/tests/SortableTest.php
index 9a2c5c6..159b71f 100644
--- a/tests/SortableTest.php
+++ b/tests/SortableTest.php
@@ -157,7 +157,7 @@ public function it_will_determine_to_sort_when_creating_if_sortable_attribute_do
     /** @test */
     public function it_will_determine_to_sort_when_creating_if_sort_when_creating_setting_does_not_exist()
     {
-        $model = new class extends Dummy {
+        $model = new class () extends Dummy {
             public $sortable = [];
         };
 
@@ -167,13 +167,13 @@ public function it_will_determine_to_sort_when_creating_if_sort_when_creating_se
     /** @test */
     public function it_will_respect_the_sort_when_creating_setting()
     {
-        $model = new class extends Dummy {
+        $model = new class () extends Dummy {
             public $sortable = ['sort_when_creating' => true];
         };
 
         $this->assertTrue($model->shouldSortWhenCreating());
 
-        $model = new class extends Dummy {
+        $model = new class () extends Dummy {
             public $sortable = ['sort_when_creating' => false];
         };
         $this->assertFalse($model->shouldSortWhenCreating());
@@ -334,7 +334,7 @@ public function it_can_use_config_properties()
         'eloquent-sortable.sort_when_creating' => true,
       ]);
 
-        $model = new class extends Dummy {
+        $model = new class () extends Dummy {
             public $sortable = [];
         };
 
@@ -345,7 +345,7 @@ public function it_can_use_config_properties()
     /** @test */
     public function it_can_override_config_properties()
     {
-        $model = new class extends Dummy {
+        $model = new class () extends Dummy {
             public $sortable = [
             'order_column_name' => 'my_custom_order_column',
             'sort_when_creating' => false,