diff --git a/tests/php/Controllers/CMSPageHistoryControllerTest.php b/tests/php/Controllers/CMSPageHistoryControllerTest.php
index 9deff305..e857e23d 100755
--- a/tests/php/Controllers/CMSPageHistoryControllerTest.php
+++ b/tests/php/Controllers/CMSPageHistoryControllerTest.php
@@ -5,6 +5,7 @@ namespace SilverStripe\CMS\Tests\Controllers;
 use Page;
 use SilverStripe\CMS\Controllers\CMSPageHistoryController;
 use SilverStripe\Control\Controller;
+use SilverStripe\Core\Injector\Injector;
 use SilverStripe\Dev\FunctionalTest;
 use SilverStripe\Forms\FieldGroup;
 use SilverStripe\Forms\FieldList;
@@ -26,6 +27,11 @@ class CMSPageHistoryControllerTest extends FunctionalTest
     {
         parent::setUp();
 
+        Injector::inst()->registerService(
+            new CMSPageHistoryController(),
+            CMSPageHistoryController::class
+        );
+
         $this->loginWithPermission('ADMIN');
 
         // creates a series of published, unpublished versions of a page