diff -u b/core/lib/Drupal/Core/Config/ExtensionInstallStorage.php b/core/lib/Drupal/Core/Config/ExtensionInstallStorage.php
--- b/core/lib/Drupal/Core/Config/ExtensionInstallStorage.php
+++ b/core/lib/Drupal/Core/Config/ExtensionInstallStorage.php
@@ -29,7 +29,7 @@
    *   The active configuration store where the list of enabled modules and
    *   themes is stored.
    * @param string $directory
-   *   The folder to scan in each extension to scan for files. Defaults to
+   *   The directory to scan in each extension to scan for files. Defaults to
    *   'config'.
    */
   public function __construct(StorageInterface $config_storage, $directory = 'config') {
diff -u b/core/lib/Drupal/Core/Config/InstallStorage.php b/core/lib/Drupal/Core/Config/InstallStorage.php
--- b/core/lib/Drupal/Core/Config/InstallStorage.php
+++ b/core/lib/Drupal/Core/Config/InstallStorage.php
@@ -30,7 +30,7 @@
   protected $folders;
 
   /**
-   * The folder to scan in each extension to scan for files.
+   * The directory to scan in each extension to scan for files.
    *
    * @var string
    */
@@ -40,7 +40,7 @@
    * Constructs an InstallStorage object.
    *
    * @param string $directory
-   *   The folder to scan in each extension to scan for files. Defaults to
+   *   The directory to scan in each extension to scan for files. Defaults to
    *   'config'.
    */
   public function __construct($directory = 'config') {