diff --git a/wp-admin/includes/class-wp-comments-list-table.php b/wp-admin/includes/class-wp-comments-list-table.php
index c4cc308b3e..4efe76dd41 100644
--- a/wp-admin/includes/class-wp-comments-list-table.php
+++ b/wp-admin/includes/class-wp-comments-list-table.php
@@ -868,9 +868,14 @@ class WP_Comments_List_Table extends WP_List_Table {
 	}
 
 	/**
-	 * @param WP_Comment $comment The comment object.
+	 * @since 5.9.0 Renamed `$comment` to `$item` to match parent class for PHP 8 named parameter support.
+	 *
+	 * @param WP_Comment $item The comment object.
 	 */
-	public function column_cb( $comment ) {
+	public function column_cb( $item ) {
+		// Restores the more descriptive, specific name for use within this method.
+		$comment = $item;
+
 		if ( $this->user_can ) {
 			?>
 		<label class="screen-reader-text" for="cb-select-<?php echo $comment->comment_ID; ?>"><?php _e( 'Select comment' ); ?></label>
diff --git a/wp-admin/includes/class-wp-links-list-table.php b/wp-admin/includes/class-wp-links-list-table.php
index 21d4724e62..8c2d06bb2c 100644
--- a/wp-admin/includes/class-wp-links-list-table.php
+++ b/wp-admin/includes/class-wp-links-list-table.php
@@ -166,10 +166,14 @@ class WP_Links_List_Table extends WP_List_Table {
 	 * Handles the checkbox column output.
 	 *
 	 * @since 4.3.0
+	 * @since 5.9.0 Renamed `$link` to `$item` to match parent class for PHP 8 named parameter support.
 	 *
-	 * @param object $link The current link object.
+	 * @param object $item The current link object.
 	 */
-	public function column_cb( $link ) {
+	public function column_cb( $item ) {
+		// Restores the more descriptive, specific name for use within this method.
+		$link = $item;
+
 		?>
 		<label class="screen-reader-text" for="cb-select-<?php echo $link->link_id; ?>">
 			<?php
diff --git a/wp-admin/includes/class-wp-media-list-table.php b/wp-admin/includes/class-wp-media-list-table.php
index c3013c84db..a95b2a332e 100644
--- a/wp-admin/includes/class-wp-media-list-table.php
+++ b/wp-admin/includes/class-wp-media-list-table.php
@@ -387,10 +387,14 @@ class WP_Media_List_Table extends WP_List_Table {
 	 * Handles the checkbox column output.
 	 *
 	 * @since 4.3.0
+	 * @since 5.9.0 Renamed `$post` to `$item` to match parent class for PHP 8 named parameter support.
 	 *
-	 * @param WP_Post $post The current WP_Post object.
+	 * @param WP_Post $item The current WP_Post object.
 	 */
-	public function column_cb( $post ) {
+	public function column_cb( $item ) {
+		// Restores the more descriptive, specific name for use within this method.
+		$post = $item;
+
 		if ( current_user_can( 'edit_post', $post->ID ) ) {
 			?>
 			<label class="screen-reader-text" for="cb-select-<?php echo $post->ID; ?>">
diff --git a/wp-admin/includes/class-wp-ms-sites-list-table.php b/wp-admin/includes/class-wp-ms-sites-list-table.php
index a95a971f49..3b41e21e5f 100644
--- a/wp-admin/includes/class-wp-ms-sites-list-table.php
+++ b/wp-admin/includes/class-wp-ms-sites-list-table.php
@@ -396,10 +396,14 @@ class WP_MS_Sites_List_Table extends WP_List_Table {
 	 * Handles the checkbox column output.
 	 *
 	 * @since 4.3.0
+	 * @since 5.9.0 Renamed `$blog` to `$item` to match parent class for PHP 8 named parameter support.
 	 *
-	 * @param array $blog Current site.
+	 * @param array $item Current site.
 	 */
-	public function column_cb( $blog ) {
+	public function column_cb( $item ) {
+		// Restores the more descriptive, specific name for use within this method.
+		$blog = $item;
+
 		if ( ! is_main_site( $blog['blog_id'] ) ) :
 			$blogname = untrailingslashit( $blog['domain'] . $blog['path'] );
 			?>
diff --git a/wp-admin/includes/class-wp-ms-themes-list-table.php b/wp-admin/includes/class-wp-ms-themes-list-table.php
index 5336f8d932..dd6b6d6c17 100644
--- a/wp-admin/includes/class-wp-ms-themes-list-table.php
+++ b/wp-admin/includes/class-wp-ms-themes-list-table.php
@@ -505,10 +505,13 @@ class WP_MS_Themes_List_Table extends WP_List_Table {
 	 * Handles the checkbox column output.
 	 *
 	 * @since 4.3.0
+	 * @since 5.9.0 Renamed `$theme` to `$item` to match parent class for PHP 8 named parameter support.
 	 *
-	 * @param WP_Theme $theme The current WP_Theme object.
+	 * @param WP_Theme $item The current WP_Theme object.
 	 */
-	public function column_cb( $theme ) {
+	public function column_cb( $item ) {
+		// Restores the more descriptive, specific name for use within this method.
+		$theme       = $item;
 		$checkbox_id = 'checkbox_' . md5( $theme->get( 'Name' ) );
 		?>
 		<input type="checkbox" name="checked[]" value="<?php echo esc_attr( $theme->get_stylesheet() ); ?>" id="<?php echo $checkbox_id; ?>" />
diff --git a/wp-admin/includes/class-wp-ms-users-list-table.php b/wp-admin/includes/class-wp-ms-users-list-table.php
index 20e1fc1c33..726d83092f 100644
--- a/wp-admin/includes/class-wp-ms-users-list-table.php
+++ b/wp-admin/includes/class-wp-ms-users-list-table.php
@@ -227,10 +227,14 @@ class WP_MS_Users_List_Table extends WP_List_Table {
 	 * Handles the checkbox column output.
 	 *
 	 * @since 4.3.0
+	 * @since 5.9.0 Renamed `$user` to `$item` to match parent class for PHP 8 named parameter support.
 	 *
-	 * @param WP_User $user The current WP_User object.
+	 * @param WP_User $item The current WP_User object.
 	 */
-	public function column_cb( $user ) {
+	public function column_cb( $item ) {
+		// Restores the more descriptive, specific name for use within this method.
+		$user = $item;
+
 		if ( is_super_admin( $user->ID ) ) {
 			return;
 		}
diff --git a/wp-admin/includes/class-wp-posts-list-table.php b/wp-admin/includes/class-wp-posts-list-table.php
index 113f7e9f93..a4e0899481 100644
--- a/wp-admin/includes/class-wp-posts-list-table.php
+++ b/wp-admin/includes/class-wp-posts-list-table.php
@@ -971,10 +971,13 @@ class WP_Posts_List_Table extends WP_List_Table {
 	 * Handles the checkbox column output.
 	 *
 	 * @since 4.3.0
+	 * @since 5.9.0 Renamed `$post` to `$item` to match parent class for PHP 8 named parameter support.
 	 *
-	 * @param WP_Post $post The current WP_Post object.
+	 * @param WP_Post $item The current WP_Post object.
 	 */
-	public function column_cb( $post ) {
+	public function column_cb( $item ) {
+		// Restores the more descriptive, specific name for use within this method.
+		$post = $item;
 		$show = current_user_can( 'edit_post', $post->ID );
 
 		/**
diff --git a/wp-admin/includes/class-wp-terms-list-table.php b/wp-admin/includes/class-wp-terms-list-table.php
index ab6e135cc3..0b931c4228 100644
--- a/wp-admin/includes/class-wp-terms-list-table.php
+++ b/wp-admin/includes/class-wp-terms-list-table.php
@@ -364,10 +364,15 @@ class WP_Terms_List_Table extends WP_List_Table {
 	}
 
 	/**
-	 * @param WP_Term $tag Term object.
+	 * @since 5.9.0 Renamed `$tag` to `$item` to match parent class for PHP 8 named parameter support.
+	 *
+	 * @param WP_Term $item Term object.
 	 * @return string
 	 */
-	public function column_cb( $tag ) {
+	public function column_cb( $item ) {
+		// Restores the more descriptive, specific name for use within this method.
+		$tag = $item;
+
 		if ( current_user_can( 'delete_term', $tag->term_id ) ) {
 			return sprintf(
 				'<label class="screen-reader-text" for="cb-select-%1$s">%2$s</label>' .
diff --git a/wp-includes/version.php b/wp-includes/version.php
index eabff0c86c..14e15d3ab0 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -13,7 +13,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.9-alpha-51734';
+$wp_version = '5.9-alpha-51735';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.