diff --git a/core/includes/install.core.inc b/core/includes/install.core.inc
index 11d2c400d6..8499f20673 100644
--- a/core/includes/install.core.inc
+++ b/core/includes/install.core.inc
@@ -2356,9 +2356,10 @@ function install_config_import_batch() {
   catch (ConfigImporterException $e) {
     global $install_state;
     // There are validation errors.
-    drupal_set_message(t('The configuration synchronization failed validation.'), 'error');
+    $messenger = \Drupal::messenger();
+    $messenger->addError(t('The configuration synchronization failed validation.'));
     foreach ($config_importer->getErrors() as $message) {
-      drupal_set_message($message, 'error');
+      $messenger->addError($message);
     }
     install_display_output(['#title' => t('Configuration validation')], $install_state);
   }
@@ -2397,13 +2398,15 @@ function install_config_import_batch_process(ConfigImporter $config_importer, $s
  * @see install_config_import_batch()
  */
 function install_config_import_batch_finish($success, $results, $operations) {
+  $messenger = \Drupal::messenger();
   if ($success) {
     if (!empty($results['errors'])) {
+      $logger = \Drupal::logger('config_sync');
       foreach ($results['errors'] as $error) {
-        drupal_set_message($error, 'error');
-        \Drupal::logger('config_sync')->error($error);
+        $messenger->addError($error);
+        $logger->error($error);
       }
-      drupal_set_message(t('The configuration was imported with errors.'), 'warning');
+      $messenger->addWarning(t('The configuration was imported with errors.'));
     }
     else {
       // Configuration sync needs a complete cache flush.
@@ -2418,7 +2421,7 @@ function install_config_import_batch_finish($success, $results, $operations) {
       '%error_operation' => $error_operation[0],
       '@arguments' => print_r($error_operation[1], TRUE)
     ]);
-    drupal_set_message($message, 'error');
+    $messenger->addError($message);
   }
 }
 
@@ -2468,10 +2471,11 @@ function install_config_fix_profile() {
     }
     catch (ConfigImporterException $e) {
       global $install_state;
+      $messenger = \Drupal::messenger();
       // There are validation errors.
-      drupal_set_message(t('The configuration synchronization failed validation.'), 'error');
+      $messenger->addError(t('The configuration synchronization failed validation.'));
       foreach ($config_importer->getErrors() as $message) {
-        drupal_set_message($message, 'error');
+        $messenger->addError($message);
       }
       install_display_output(['#title' => t('Configuration validation')], $install_state);
     }