diff --git a/src/wp-admin/includes/class-core-upgrader.php b/src/wp-admin/includes/class-core-upgrader.php
index b57a13fd7b..0226f74289 100644
--- a/src/wp-admin/includes/class-core-upgrader.php
+++ b/src/wp-admin/includes/class-core-upgrader.php
@@ -283,7 +283,7 @@ class Core_Upgrader extends WP_Upgrader {
 		$upgrade_minor = get_site_option( 'auto_update_core_minor', 'enabled' ) === 'enabled';
 		$upgrade_major = get_site_option( 'auto_update_core_major', 'unset' ) === 'enabled';
 
-		// WP_AUTO_UPDATE_CORE = true (all), 'beta', 'rc', 'minor', false.
+		// WP_AUTO_UPDATE_CORE = true (all), 'beta', 'rc', 'development', 'minor', false.
 		if ( defined( 'WP_AUTO_UPDATE_CORE' ) ) {
 			if ( false === WP_AUTO_UPDATE_CORE ) {
 				// Defaults to turned off, unless a filter allows it.
@@ -293,6 +293,7 @@ class Core_Upgrader extends WP_Upgrader {
 			} elseif ( true === WP_AUTO_UPDATE_CORE
 				|| 'beta' === WP_AUTO_UPDATE_CORE
 				|| 'rc' === WP_AUTO_UPDATE_CORE
+				|| 'development' === WP_AUTO_UPDATE_CORE
 			) {
 				// ALL updates for core.
 				$upgrade_dev   = true;
diff --git a/src/wp-admin/includes/class-wp-site-health-auto-updates.php b/src/wp-admin/includes/class-wp-site-health-auto-updates.php
index 33003a1c89..334f76f0cd 100644
--- a/src/wp-admin/includes/class-wp-site-health-auto-updates.php
+++ b/src/wp-admin/includes/class-wp-site-health-auto-updates.php
@@ -27,7 +27,7 @@ class WP_Site_Health_Auto_Updates {
 	 */
 	public function run_tests() {
 		$tests = array(
-			$this->test_constants( 'WP_AUTO_UPDATE_CORE', array( true, 'beta', 'rc', 'minor' ) ),
+			$this->test_constants( 'WP_AUTO_UPDATE_CORE', array( true, 'beta', 'rc', 'development', 'minor' ) ),
 			$this->test_wp_version_check_attached(),
 			$this->test_filters_automatic_updater_disabled(),
 			$this->test_wp_automatic_updates_disabled(),
diff --git a/src/wp-admin/update-core.php b/src/wp-admin/update-core.php
index 2979d69996..19012c8174 100644
--- a/src/wp-admin/update-core.php
+++ b/src/wp-admin/update-core.php
@@ -306,7 +306,7 @@ function core_auto_updates_settings() {
 	$upgrade_major = get_site_option( 'auto_update_core_major', 'unset' ) === 'enabled';
 
 	$can_set_update_option = true;
-	// WP_AUTO_UPDATE_CORE = true (all), 'beta', 'rc', 'minor', false.
+	// WP_AUTO_UPDATE_CORE = true (all), 'beta', 'rc', 'development', 'minor', false.
 	if ( defined( 'WP_AUTO_UPDATE_CORE' ) ) {
 		if ( false === WP_AUTO_UPDATE_CORE ) {
 			// Defaults to turned off, unless a filter allows it.
@@ -316,6 +316,7 @@ function core_auto_updates_settings() {
 		} elseif ( true === WP_AUTO_UPDATE_CORE
 			|| 'beta' === WP_AUTO_UPDATE_CORE
 			|| 'rc' === WP_AUTO_UPDATE_CORE
+			|| 'development' === WP_AUTO_UPDATE_CORE
 		) {
 			// ALL updates for core.
 			$upgrade_dev   = true;
diff --git a/src/wp-includes/update.php b/src/wp-includes/update.php
index c632b8405a..bc10a3d91d 100644
--- a/src/wp-includes/update.php
+++ b/src/wp-includes/update.php
@@ -136,8 +136,8 @@ function wp_version_check( $extra_stats = array(), $force_check = false ) {
 		$post_body = array_merge( $post_body, $extra_stats );
 	}
 
-	// Allow for WP_AUTO_UPDATE_CORE to specify beta/RC releases.
-	if ( defined( 'WP_AUTO_UPDATE_CORE' ) && in_array( WP_AUTO_UPDATE_CORE, array( 'beta', 'rc' ), true ) ) {
+	// Allow for WP_AUTO_UPDATE_CORE to specify beta/RC/development releases.
+	if ( defined( 'WP_AUTO_UPDATE_CORE' ) && in_array( WP_AUTO_UPDATE_CORE, array( 'beta', 'rc', 'development' ), true ) ) {
 		$query['channel'] = WP_AUTO_UPDATE_CORE;
 	}