From 12ccb9636c1160d472da2fadfa652eca49d1055e Mon Sep 17 00:00:00 2001
From: Guy Sartorelli <guy.sartorelli@silverstripe.com>
Date: Tue, 31 May 2022 15:07:04 +1200
Subject: [PATCH] MNT Explicitly set class for test polymorphic has_one

---
 tests/php/Form/GridFieldAddClassesButtonTest.php | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/tests/php/Form/GridFieldAddClassesButtonTest.php b/tests/php/Form/GridFieldAddClassesButtonTest.php
index 4dffc02..df96672 100644
--- a/tests/php/Form/GridFieldAddClassesButtonTest.php
+++ b/tests/php/Form/GridFieldAddClassesButtonTest.php
@@ -34,7 +34,11 @@ class GridFieldAddClassesButtonTest extends SapphireTest
         $controller->setCurrentPageID($udf->ID);
         $controller->pushCurrent();
         $list = new DataList(EditableFormField::class);
-        $field = EditableTextField::create(['ParentID' => $udfID, 'Title' => 'MyTitle']);
+        $field = EditableTextField::create([
+            'ParentClass' => UserDefinedForm::class,
+            'ParentID' => $udfID,
+            'Title' => 'MyTitle',
+        ]);
         $fieldID = $field->write();
         $list->add($field);
         $gridField = new GridField('MyName', 'MyTitle', $list);