diff --git a/core/modules/file/tests/src/Kernel/Migrate/d7/MigratePrivateFileTest.php b/core/modules/file/tests/src/Kernel/Migrate/d7/MigratePrivateFileTest.php
index 076c1fa..600845e 100644
--- a/core/modules/file/tests/src/Kernel/Migrate/d7/MigratePrivateFileTest.php
+++ b/core/modules/file/tests/src/Kernel/Migrate/d7/MigratePrivateFileTest.php
@@ -25,6 +25,8 @@ protected function setUp() {
     $this->installEntitySchema('file');
     $fs = $this->container->get('file_system');
 
+    // Ensure that the private files directory exists.
+    $fs->mkdir('private://', NULL, TRUE);
     // Put test file in the source directory.
     file_put_contents('private://Babylon5.txt', str_repeat('*', 3));