diff --git a/core/lib/Drupal/Core/Config/ConfigFactoryInterface.php b/core/lib/Drupal/Core/Config/ConfigFactoryInterface.php
index 6634047..0678456 100644
--- a/core/lib/Drupal/Core/Config/ConfigFactoryInterface.php
+++ b/core/lib/Drupal/Core/Config/ConfigFactoryInterface.php
@@ -59,7 +59,7 @@ public function get($name);
    * @param array $names
    *   List of names of configuration objects.
    *
-   * @return array
+   * @return \Drupal\Core\Config\Config[]
    *   List of successfully loaded configuration objects, keyed by name.
    */
   public function loadMultiple(array $names);
@@ -67,7 +67,7 @@ public function loadMultiple(array $names);
   /**
    * Resets and re-initializes configuration objects. Internal use only.
    *
-   * @param string $name
+   * @param string|null $name
    *   (optional) The name of the configuration object to reset. If omitted, all
    *   configuration objects are reset.
    *
@@ -122,7 +122,7 @@ public function clearStaticCache();
   /**
    * Sets the language to be used in configuration overrides.
    *
-   * @param \Drupal\Core\Language\Language $language
+   * @param \Drupal\Core\Language\Language|null $language
    *   The language object to be set on the config factory. Used to override
    *   configuration by language.
    *