diff --git a/packages/block-editor/src/components/use-setting/index.js b/packages/block-editor/src/components/use-setting/index.js
index 4108ddd24a955..c57a53026cb49 100644
--- a/packages/block-editor/src/components/use-setting/index.js
+++ b/packages/block-editor/src/components/use-setting/index.js
@@ -119,7 +119,7 @@ export default function useSetting( path ) {
 					return (
 						experimentalFeaturesResult.user ??
 						experimentalFeaturesResult.theme ??
-						experimentalFeaturesResult.core
+						experimentalFeaturesResult.default
 					);
 				}
 				return experimentalFeaturesResult;
diff --git a/packages/edit-site/src/components/global-styles/use-global-styles-output.js b/packages/edit-site/src/components/global-styles/use-global-styles-output.js
index a67c3e5fb3af4..b0d40133cca2c 100644
--- a/packages/edit-site/src/components/global-styles/use-global-styles-output.js
+++ b/packages/edit-site/src/components/global-styles/use-global-styles-output.js
@@ -60,7 +60,7 @@ function getPresetsDeclarations( blockPresets = {} ) {
 		PRESET_METADATA,
 		( declarations, { path, valueKey, cssVarInfix } ) => {
 			const presetByOrigin = get( blockPresets, path, [] );
-			[ 'core', 'theme', 'user' ].forEach( ( origin ) => {
+			[ 'default', 'theme', 'user' ].forEach( ( origin ) => {
 				if ( presetByOrigin[ origin ] ) {
 					presetByOrigin[ origin ].forEach( ( value ) => {
 						declarations.push(
@@ -94,7 +94,7 @@ function getPresetsClasses( blockSelector, blockPresets = {} ) {
 			}
 
 			const presetByOrigin = get( blockPresets, path, [] );
-			[ 'core', 'theme', 'user' ].forEach( ( origin ) => {
+			[ 'default', 'theme', 'user' ].forEach( ( origin ) => {
 				if ( presetByOrigin[ origin ] ) {
 					presetByOrigin[ origin ].forEach( ( { slug } ) => {
 						classes.forEach( ( { classSuffix, propertyName } ) => {
diff --git a/phpunit/class-wp-theme-json-test.php b/phpunit/class-wp-theme-json-test.php
index 5514727f95f62..fb2388dda5444 100644
--- a/phpunit/class-wp-theme-json-test.php
+++ b/phpunit/class-wp-theme-json-test.php
@@ -553,7 +553,7 @@ public function test_get_stylesheet_preset_values_are_marked_as_important() {
 					),
 				),
 			),
-			'core'
+			'default'
 		);
 
 		$this->assertEquals(