diff --git a/core/install.php b/core/install.php
index ea30919d9c..534797598a 100644
--- a/core/install.php
+++ b/core/install.php
@@ -40,5 +40,5 @@
 }
 
 // Start the installer.
-require_once __DIR__ . '/includes/install.core.inc';
+require_once $root_path . '/core/includes/install.core.inc';
 install_drupal($class_loader);
diff --git a/core/lib/Drupal/Core/Extension/ThemeHandler.php b/core/lib/Drupal/Core/Extension/ThemeHandler.php
index 5af6d68c01..a5dd850d88 100644
--- a/core/lib/Drupal/Core/Extension/ThemeHandler.php
+++ b/core/lib/Drupal/Core/Extension/ThemeHandler.php
@@ -5,7 +5,6 @@
 use Drupal\Core\Config\ConfigFactoryInterface;
 use Drupal\Core\Extension\Exception\UninstalledExtensionException;
 use Drupal\Core\Extension\Exception\UnknownExtensionException;
-use Drupal\Core\Requirements;
 
 /**
  * Default theme handler using the config system to store installation statuses.