public function testSerialization_customTempDir_nonexistent()
 {
     $serializableFile = new SerializableFile(new UploadedFile(__FILE__, 'my.txt', null, null, null, true));
     $processedUploadedFile = $serializableFile->getAsFile('xyz:/');
     $this->assertEquals(sys_get_temp_dir(), $processedUploadedFile->getPath());
 }