diff --git a/core/modules/config/src/StorageReplaceDataWrapper.php b/core/modules/config/src/StorageReplaceDataWrapper.php
index 58b3b49..c8d358b 100644
--- a/core/modules/config/src/StorageReplaceDataWrapper.php
+++ b/core/modules/config/src/StorageReplaceDataWrapper.php
@@ -44,6 +44,7 @@ class StorageReplaceDataWrapper implements StorageInterface {
   public function __construct(StorageInterface $storage, $collection = StorageInterface::DEFAULT_COLLECTION) {
     $this->storage = $storage;
     $this->collection = $collection;
+    $this->replacementData[$collection] = [];
   }
 
   /**
@@ -164,8 +165,10 @@ public function deleteAll($prefix = '') {
    * {@inheritdoc}
    */
   public function createCollection($collection) {
-    $this->collection = $collection;
-    return $this->storage->createCollection($collection);
+    return new static(
+      $this->storage->createCollection($collection),
+      $collection
+    );
   }
 
   /**
diff --git a/core/modules/config/src/Tests/ConfigSingleImportExportTest.php b/core/modules/config/src/Tests/ConfigSingleImportExportTest.php
index a5b8386..d7f9c7f 100644
--- a/core/modules/config/src/Tests/ConfigSingleImportExportTest.php
+++ b/core/modules/config/src/Tests/ConfigSingleImportExportTest.php
@@ -20,7 +20,8 @@ class ConfigSingleImportExportTest extends WebTestBase {
   public static $modules = [
     'block',
     'config',
-    'config_test'
+    'config_test',
+    'language',
   ];
 
   protected function setUp() {