diff --git a/tests/model/DataObjectTest.php b/tests/model/DataObjectTest.php
index 58da7cc57..e4fdb953e 100644
--- a/tests/model/DataObjectTest.php
+++ b/tests/model/DataObjectTest.php
@@ -29,6 +29,7 @@ class DataObjectTest extends SapphireTest {
 		'DataObjectTest_Play',
 		'DataObjectTest_Ploy',
 		'DataObjectTest_Bogey',
+		'DataObjectTest_Sortable',
 		'ManyManyListTest_Product',
 		'ManyManyListTest_Category',
 	);