diff --git a/core/tests/Drupal/Tests/Component/PhpStorage/FileStorageTest.php b/core/tests/Drupal/Tests/Component/PhpStorage/FileStorageTest.php
index 78bfa3d..f90fede 100644
--- a/core/tests/Drupal/Tests/Component/PhpStorage/FileStorageTest.php
+++ b/core/tests/Drupal/Tests/Component/PhpStorage/FileStorageTest.php
@@ -152,7 +152,7 @@ public function testDeleteAll() {
 
     $this->assertTrue($php->deleteAll());
     $this->assertFalse($php->load($name));
-    $this->assertFalse(file_exists(sys_get_temp_dir() . '/php/simpletest'), 'File storage directory still exists after call to deleteAll().');
+    $this->assertFalse(file_exists(sys_get_temp_dir() . '/php/test'), 'File storage directory still exists after call to deleteAll().');
 
     // Should still return TRUE if directory has already been deleted.
     $this->assertTrue($php->deleteAll());