diff --git a/wp-includes/blocks/rss.php b/wp-includes/blocks/rss.php
index f1b7f3f19d..0300585de2 100644
--- a/wp-includes/blocks/rss.php
+++ b/wp-includes/blocks/rss.php
@@ -96,7 +96,7 @@ function render_block_core_rss( $attributes ) {
 		$class .= ' ' . $attributes['className'];
 	}
 
-	$list_items_markup = sprintf( "<ul class='%s'>%s</ul>", esc_attr( $class ), $list_items );
+	$list_items_markup = "<ul class='{$class}'>{$list_items}</ul>";
 
 	// PHP 5.2 compatibility. See: http://simplepie.org/wiki/faq/i_m_getting_memory_leaks.
 	$rss->__destruct();
diff --git a/wp-includes/blocks/search.php b/wp-includes/blocks/search.php
index c50b69a441..6cd909fc6f 100644
--- a/wp-includes/blocks/search.php
+++ b/wp-includes/blocks/search.php
@@ -52,7 +52,7 @@ function render_block_core_search( $attributes ) {
 
 	return sprintf(
 		'<form class="%s" role="search" method="get" action="%s">%s</form>',
-		esc_attr( $class ),
+		$class,
 		esc_url( home_url( '/' ) ),
 		$label_markup . $input_markup . $button_markup
 	);
diff --git a/wp-includes/version.php b/wp-includes/version.php
index cf05cdba2a..0ed9611e4c 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -13,7 +13,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.3.3-alpha-47644';
+$wp_version = '5.3.4';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.