diff --git a/src/wp-admin/includes/class-wp-debug-data.php b/src/wp-admin/includes/class-wp-debug-data.php
index e646cad3e4..4884de2700 100644
--- a/src/wp-admin/includes/class-wp-debug-data.php
+++ b/src/wp-admin/includes/class-wp-debug-data.php
@@ -943,7 +943,7 @@ class WP_Debug_Data {
 			$return .= "\n";
 		}
 
-		$return .= "`";
+		$return .= '`';
 
 		return $return;
 	}