diff --git a/phpunit/block-supports/background-test.php b/phpunit/block-supports/background-test.php
index c0b87cc988e43..33e72e9b07010 100644
--- a/phpunit/block-supports/background-test.php
+++ b/phpunit/block-supports/background-test.php
@@ -156,7 +156,7 @@ public function data_background_block_support() {
 					'backgroundImage' => true,
 				),
 				'background_style'    => array(
-					'backgroundImage'  => array(
+					'backgroundImage'      => array(
 						'url'    => 'https://example.com/image.jpg',
 						'source' => 'file',
 					),