diff --git a/core/lib/Drupal/Core/EventSubscriber/ConfigImportSubscriber.php b/core/lib/Drupal/Core/EventSubscriber/ConfigImportSubscriber.php
index e5769bf..abd6d6d 100644
--- a/core/lib/Drupal/Core/EventSubscriber/ConfigImportSubscriber.php
+++ b/core/lib/Drupal/Core/EventSubscriber/ConfigImportSubscriber.php
@@ -72,7 +72,8 @@ public function onConfigImporterValidate(ConfigImporterEvent $event) {
    *   The configuration importer.
    */
   protected function validateThemeInstalls(ConfigImporter $config_importer) {
-    $themes = $this->themeHandler->listInfo();
+    // Get all themes including those that are not installed.
+    $themes = $this->themeHandler->rebuildThemeData();
     foreach ($config_importer->getExtensionChangelist('theme', 'install') as $theme) {
       if (!isset($themes[$theme])) {
         $config_importer->logError($this->t('Unable to install theme %theme since it does not exist.', array('%theme' => $theme)));