diff --git a/tests/phpunit/tests/rest-api/rest-attachments-controller.php b/tests/phpunit/tests/rest-api/rest-attachments-controller.php
index c8a6e180a3..585b2b5b4f 100644
--- a/tests/phpunit/tests/rest-api/rest-attachments-controller.php
+++ b/tests/phpunit/tests/rest-api/rest-attachments-controller.php
@@ -1079,7 +1079,7 @@ class WP_Test_REST_Attachments_Controller extends WP_Test_REST_Post_Type_Control
 			array(
 				'post_mime_type' => 'image/jpeg',
 				'post_excerpt'   => 'A sample caption',
-				'post_author'    => $this->editor_id,
+				'post_author'    => self::$editor_id,
 			)
 		);