diff --git a/core/includes/install.core.inc b/core/includes/install.core.inc
index bc8135f..aeb2456 100644
--- a/core/includes/install.core.inc
+++ b/core/includes/install.core.inc
@@ -7,9 +7,9 @@
 use Drupal\Core\Database\DatabaseExceptionWrapper;
 use Drupal\Core\Database\Install\TaskException;
 use Drupal\Core\Form\FormState;
-use Drupal\Core\Installer\Exception\ActiveConfigurationExists;
+use Drupal\Core\Installer\Exception\ActiveConfigurationExistsException;
 use Drupal\Core\Installer\Exception\DatabaseAlreadyPopulatedException;
-use Drupal\Core\Installer\Exception\InstallationTasksCompleted;
+use Drupal\Core\Installer\Exception\InstallationTasksCompletedException;
 use Drupal\Core\Installer\Exception\InstallerException;
 use Drupal\Core\Installer\Exception\NoProfilesException;
 use Drupal\Core\Installer\Exception\SettingsAlreadyExistsException;
@@ -492,7 +492,7 @@ function install_begin_request($class_loader, &$install_state) {
     if (!empty($config)) {
       $task = NULL;
       $translator = $container->get('string_translation');
-      throw new ActiveConfigurationExists($translator);
+      throw new ActiveConfigurationExistsException($translator);
     }
   }
 
@@ -1074,7 +1074,7 @@ function install_verify_completed_task() {
   if (isset($task)) {
     if ($task == 'done') {
       $translator = \Drupal::service('string_translation');
-      throw new InstallationTasksCompleted($translator);
+      throw new InstallationTasksCompletedException($translator);
     }
     return $task;
   }
diff --git a/core/lib/Drupal/Core/Installer/Exception/ActiveConfigurationExistsException.php b/core/lib/Drupal/Core/Installer/Exception/ActiveConfigurationExistsException.php
index d210144..8bdb3a7 100644
--- a/core/lib/Drupal/Core/Installer/Exception/ActiveConfigurationExistsException.php
+++ b/core/lib/Drupal/Core/Installer/Exception/ActiveConfigurationExistsException.php
@@ -2,7 +2,7 @@
 
 /**
  * @file
- * Contains \Drupal\Core\Installer\Exception\ActiveConfigurationExists.
+ * Contains \Drupal\Core\Installer\Exception\ActiveConfigurationExistsException.
  */
 
 namespace Drupal\Core\Installer\Exception;
@@ -12,7 +12,7 @@
 /**
  * Exception thrown if Drupal is installed already.
  */
-class ActiveConfigurationExists extends AlreadyInstalledException {
+class ActiveConfigurationExistsException extends AlreadyInstalledException {
 
   /**
    * {@inheritdoc}
diff --git a/core/lib/Drupal/Core/Installer/Exception/InstallationTasksCompletedException.php b/core/lib/Drupal/Core/Installer/Exception/InstallationTasksCompletedException.php
index fb0c39f..6890ddf 100644
--- a/core/lib/Drupal/Core/Installer/Exception/InstallationTasksCompletedException.php
+++ b/core/lib/Drupal/Core/Installer/Exception/InstallationTasksCompletedException.php
@@ -2,7 +2,7 @@
 
 /**
  * @file
- * Contains \Drupal\Core\Installer\Exception\InstallationTasksCompleted.
+ * Contains \Drupal\Core\Installer\Exception\InstallationTasksCompletedException.
  */
 
 namespace Drupal\Core\Installer\Exception;
@@ -12,7 +12,7 @@
 /**
  * Exception thrown if Drupal is installed already.
  */
-class InstallationTasksCompleted extends AlreadyInstalledException {
+class InstallationTasksCompletedException extends AlreadyInstalledException {
 
   /**
    * {@inheritdoc}