diff --git a/php/integrations/yoast.php b/php/integrations/yoast.php
index 938a9277..8807e6f4 100644
--- a/php/integrations/yoast.php
+++ b/php/integrations/yoast.php
@@ -11,6 +11,7 @@
 use Yoast\WP\SEO\Generators\Schema\Abstract_Schema_Piece;
 use Yoast\WP\SEO\Presentations\Indexable_Author_Archive_Presentation;
 use WP_User;
+use function __;
 
 /**
  * The main Yoast integration class
@@ -256,7 +257,7 @@ public static function filter_slack_data( $data, $presentation ): array {
 		}
 
 		$output = self::get_authors_display_names_output( $author_objects );
-		$data[ \__( 'Written by', 'co-authors-plus' ) ] = $output;
+		$data[ __( 'Written by', 'co-authors-plus' ) ] = $output;
 		return $data;
 	}
 
@@ -339,7 +340,7 @@ public static function fix_guest_author_archive_url_presenter( $url, $presenter
 	 * @return array   Modified $replacements.
 	 */
 	public static function filter_author_name_variable( $replacements, $args ): array {
-		if ( isset( $replacements['%%name%%'], $args->ID ) ) {
+		if ( isset( $replacements['%%name%%'], $args->ID ) && is_single() ) {
 			$author_objects = get_coauthors( $args->ID );
 
 			// Fallback in case of error.