Index: wp-admin/css/common.css
===================================================================
--- wp-admin/css/common.css	(revision 33816)
+++ wp-admin/css/common.css	(working copy)
@@ -329,8 +329,7 @@
 	margin: .67em 0;
 }
 
-.wrap > h1,
-h2 {
+.wrap > h1 {
 	color: #23282d;
 	font-size: 1.5em;
 	margin: .83em 0;
@@ -337,6 +336,7 @@
 	font-weight: 400;
 }
 
+h2,
 h3 {
 	color: #23282d;
 	font-size: 1.3em;
@@ -568,14 +568,12 @@
 }
 
 .wrap h1,
-.wrap h2,
 .subtitle {
 	font-weight: normal;
 	margin: 0;
 }
 
-.wrap h1,
-.wrap h2 {
+.wrap h1 {
 	font-size: 23px;
 	font-weight: 400;
 	padding: 9px 15px 4px 0;
Index: wp-admin/update-core.php
===================================================================
--- wp-admin/update-core.php	(revision 33816)
+++ wp-admin/update-core.php	(working copy)
@@ -159,7 +159,7 @@
 	$updates = get_core_updates();
 
 	if ( !isset($updates[0]->response) || 'latest' == $updates[0]->response ) {
-		echo '<h3>';
+		echo '<h2>';
 		_e('You have the latest version of WordPress.');
 
 		if ( wp_http_supports( array( 'ssl' ) ) ) {
@@ -175,15 +175,15 @@
 			if ( $should_auto_update )
 				echo ' ' . __( 'Future security updates will be applied automatically.' );
 		}
-		echo '</h3>';
+		echo '</h2>';
 	} else {
 		echo '<div class="notice notice-warning"><p>';
 		_e('<strong>Important:</strong> before updating, please <a href="https://codex.wordpress.org/WordPress_Backups">back up your database and files</a>. For help with updates, visit the <a href="https://codex.wordpress.org/Updating_WordPress">Updating WordPress</a> Codex page.');
 		echo '</p></div>';
 
-		echo '<h3 class="response">';
+		echo '<h2 class="response">';
 		_e( 'An updated version of WordPress is available.' );
-		echo '</h3>';
+		echo '</h2>';
 	}
 
 	if ( isset( $updates[0] ) && $updates[0]->response == 'development' ) {
@@ -225,7 +225,7 @@
 	require_once(ABSPATH . 'wp-admin/includes/plugin-install.php');
 	$plugins = get_plugin_updates();
 	if ( empty( $plugins ) ) {
-		echo '<h3>' . __( 'Plugins' ) . '</h3>';
+		echo '<h2>' . __( 'Plugins' ) . '</h2>';
 		echo '<p>' . __( 'Your plugins are all up to date.' ) . '</p>';
 		return;
 	}
@@ -237,7 +237,7 @@
 	else
 		$core_update_version = $core_updates[0]->current;
 	?>
-<h3><?php _e( 'Plugins' ); ?></h3>
+<h2><?php _e( 'Plugins' ); ?></h2>
 <p><?php _e( 'The following plugins have new versions available. Check the ones you want to update and then click &#8220;Update Plugins&#8221;.' ); ?></p>
 <form method="post" action="<?php echo esc_url( $form_action ); ?>" name="upgrade-plugins" class="upgrade">
 <?php wp_nonce_field('upgrade-core'); ?>
@@ -314,7 +314,7 @@
 function list_theme_updates() {
 	$themes = get_theme_updates();
 	if ( empty( $themes ) ) {
-		echo '<h3>' . __( 'Themes' ) . '</h3>';
+		echo '<h2>' . __( 'Themes' ) . '</h2>';
 		echo '<p>' . __( 'Your themes are all up to date.' ) . '</p>';
 		return;
 	}
@@ -321,7 +321,7 @@
 
 	$form_action = 'update-core.php?action=do-theme-upgrade';
 ?>
-<h3><?php _e( 'Themes' ); ?></h3>
+<h2><?php _e( 'Themes' ); ?></h2>
 <p><?php _e( 'The following themes have new versions available. Check the ones you want to update and then click &#8220;Update Themes&#8221;.' ); ?></p>
 <p><?php printf( __( '<strong>Please Note:</strong> Any customizations you have made to theme files will be lost. Please consider using <a href="%s">child themes</a> for modifications.' ), __( 'https://codex.wordpress.org/Child_Themes' ) ); ?></p>
 <form method="post" action="<?php echo esc_url( $form_action ); ?>" name="upgrade-themes" class="upgrade">
@@ -366,7 +366,7 @@
 	$updates = wp_get_translation_updates();
 	if ( ! $updates ) {
 		if ( 'en_US' != get_locale() ) {
-			echo '<h3>' . __( 'Translations' ) . '</h3>';
+			echo '<h2>' . __( 'Translations' ) . '</h2>';
 			echo '<p>' . __( 'Your translations are all up to date.' ) . '</p>';
 		}
 		return;
@@ -374,7 +374,7 @@
 
 	$form_action = 'update-core.php?action=do-translation-upgrade';
 	?>
-	<h3><?php _e( 'Translations' ); ?></h3>
+	<h2><?php _e( 'Translations' ); ?></h2>
 	<form method="post" action="<?php echo esc_url( $form_action ); ?>" name="upgrade-translations" class="upgrade">
 		<p><?php _e( 'New translations are available.' ); ?></p>
 		<?php wp_nonce_field( 'upgrade-translations' ); ?>