diff --git a/src/wp-includes/class-wp-theme-json.php b/src/wp-includes/class-wp-theme-json.php
index 6fd954705e85e..6367521239315 100644
--- a/src/wp-includes/class-wp-theme-json.php
+++ b/src/wp-includes/class-wp-theme-json.php
@@ -679,6 +679,7 @@ public static function get_element_class_name( $element ) {
 		array( 'spacing', 'margin' ),
 		array( 'spacing', 'padding' ),
 		array( 'typography', 'lineHeight' ),
+		array( 'shadow', 'defaultPresets' ),
 	);
 
 	/**
diff --git a/tests/phpunit/tests/theme/wpThemeJson.php b/tests/phpunit/tests/theme/wpThemeJson.php
index f5b2017e1a842..8dadc9a690e0e 100644
--- a/tests/phpunit/tests/theme/wpThemeJson.php
+++ b/tests/phpunit/tests/theme/wpThemeJson.php
@@ -293,6 +293,9 @@ public function test_get_settings_appearance_true_opts_in() {
 			'typography' => array(
 				'lineHeight' => true,
 			),
+			'shadow'     => array(
+				'defaultPresets' => true,
+			),
 			'blocks'     => array(
 				'core/paragraph' => array(
 					'typography' => array(
@@ -331,6 +334,9 @@ public function test_get_settings_appearance_true_opts_in() {
 					'typography' => array(
 						'lineHeight' => false,
 					),
+					'shadow'     => array(
+						'defaultPresets' => true,
+					),
 				),
 			),
 		);