diff --git a/core/tests/Drupal/Tests/Component/PhpStorage/FileStorageTest.php b/core/tests/Drupal/Tests/Component/PhpStorage/FileStorageTest.php
index 4972a7419d..52e1b83c03 100644
--- a/core/tests/Drupal/Tests/Component/PhpStorage/FileStorageTest.php
+++ b/core/tests/Drupal/Tests/Component/PhpStorage/FileStorageTest.php
@@ -92,15 +92,15 @@ public function testDeleteAll() {
   /**
    * @covers ::createDirectory
    */
-  function testCreateDirectoryFailWarning() {
-      $directory = new vfsStreamDirectory('permissionDenied', 0200);
-      $storage = new FileStorage([
-        'directory' => $directory->url(),
-        'bin' => 'test',
-      ]);
-      $code = "<?php\n echo 'here';";
-      $this->setExpectedException(PHPUnit_Framework_Error_Warning::class, 'mkdir(): Permission Denied');
-      $storage->save('subdirectory/foo.php', $code);
+  public function testCreateDirectoryFailWarning() {
+    $directory = new vfsStreamDirectory('permissionDenied', 0200);
+    $storage = new FileStorage([
+      'directory' => $directory->url(),
+      'bin' => 'test',
+    ]);
+    $code = "<?php\n echo 'here';";
+    $this->setExpectedException(PHPUnit_Framework_Error_Warning::class, 'mkdir(): Permission Denied');
+    $storage->save('subdirectory/foo.php', $code);
   }
 
 }