diff --git a/wp-content/themes/twentytwentyfive/style.css b/wp-content/themes/twentytwentyfive/style.css
index ac150b9788..df713de66a 100644
--- a/wp-content/themes/twentytwentyfive/style.css
+++ b/wp-content/themes/twentytwentyfive/style.css
@@ -59,3 +59,11 @@ h1, h2, h3, h4, h5, h6, blockquote, caption, figcaption, p {
 .more-link {
 	display: block;
 }
+
+/*
+ * Prevents unnecessary scrollbars while handling long lines of preformatted text.
+ * https://core.trac.wordpress.org/ticket/63875
+ */
+:where(pre) {
+	overflow-x: auto;
+}
diff --git a/wp-content/themes/twentytwentytwo/style.css b/wp-content/themes/twentytwentytwo/style.css
index 67fba3297a..738c880499 100644
--- a/wp-content/themes/twentytwentytwo/style.css
+++ b/wp-content/themes/twentytwentytwo/style.css
@@ -159,3 +159,12 @@ body > .is-root-container > .wp-block-template-part > .wp-block-cover,
 .wp-block-post-comments ol.commentlist li.comment:not(:last-child) {
 	margin-bottom: 1rem;
 }
+
+/*
+ * Prevents unnecessary scrollbars while handling long lines of preformatted text.
+ * https://core.trac.wordpress.org/ticket/63875
+ */
+
+:where(pre) {
+	overflow-x: auto;
+}
diff --git a/wp-includes/version.php b/wp-includes/version.php
index 98f9908143..c91dd70859 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -16,7 +16,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '6.9-alpha-60920';
+$wp_version = '6.9-alpha-60921';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.