diff --git a/src/wp-admin/css/list-tables.css b/src/wp-admin/css/list-tables.css
index 29443bbdb2..a5bdc7a252 100644
--- a/src/wp-admin/css/list-tables.css
+++ b/src/wp-admin/css/list-tables.css
@@ -1903,11 +1903,13 @@ div.action-links,
 		overflow: hidden;
 	}
 
-	/* Plugin/Theme Management Page */
+	/* List tables that don't toggle rows */
+	.comments-box .toggle-row,
 	.wp-list-table.plugins .toggle-row {
 		display: none;
 	}
 
+	/* Plugin/Theme Management */
 	#wpbody-content .wp-list-table.plugins td {
 		display: block;
 		width: auto;
diff --git a/src/wp-admin/includes/class-wp-comments-list-table.php b/src/wp-admin/includes/class-wp-comments-list-table.php
index 86db55f85d..865fdb583c 100644
--- a/src/wp-admin/includes/class-wp-comments-list-table.php
+++ b/src/wp-admin/includes/class-wp-comments-list-table.php
@@ -747,6 +747,7 @@ class WP_Post_Comments_List_Table extends WP_Comments_List_Table {
 	 */
 	protected function get_table_classes() {
 		$classes = parent::get_table_classes();
+		$classes[] = 'wp-list-table';
 		$classes[] = 'comments-box';
 		return $classes;
 	}