diff --git a/core/modules/config/src/Tests/ConfigExportUITest.php b/core/modules/config/src/Tests/ConfigExportUITest.php
index f8f1db0..2ada1d6 100644
--- a/core/modules/config/src/Tests/ConfigExportUITest.php
+++ b/core/modules/config/src/Tests/ConfigExportUITest.php
@@ -9,6 +9,7 @@
 
 use Drupal\Component\Serialization\Yaml;
 use Drupal\Core\Archiver\Tar;
+use Drupal\Core\Config\StorageInterface;
 use Drupal\simpletest\WebTestBase;
 
 /**
@@ -64,7 +65,10 @@ function testExport() {
     $config_files = array();
     foreach ($storage_active->listAll() as $config_name) {
       $config_files[] = $config_name . '.yml';
-      // All active configuration in this test was installed with a project.
+    }
+    // Add configuration copies to the list of expected files.
+    $copy_collection = $storage_active->createCollection(StorageInterface::ORIGINAL_COPY_COLLECTION);
+    foreach ($copy_collection->listAll() as $config_name) {
       $config_files[] = 'originalcopy/' . $config_name . '.yml';
     }
     // Assert that the downloaded archive file contents are the same as the test