diff -u b/core/lib/Drupal/Core/Config/ConfigFactoryOverrideInterface.php b/core/lib/Drupal/Core/Config/ConfigFactoryOverrideInterface.php
--- b/core/lib/Drupal/Core/Config/ConfigFactoryOverrideInterface.php
+++ b/core/lib/Drupal/Core/Config/ConfigFactoryOverrideInterface.php
@@ -37,7 +37,7 @@
    *
    * If the overrider stores it's overrides in configuration collections then
    * it can have its own implementation of
-   * \Drupal\Core\Config\StorableConfigBase. Configuration overrider's can link
+   * \Drupal\Core\Config\StorableConfigBase. Configuration overriders can link
    * themselves to a configuration collection by listening to the
    * \Drupal\Core\Config\ConfigEvents::COLLECTION_INFO event and adding the
    * collections they are responsible for. Doing this will allow installation