JDK-8251213 introduces a new CDSTestUtils.getOutputDir() method. For consistence, existing CDS tests with the following pattern

    String s = System.getProperty("user.dir");
    File dir = new File(System.getProperty("user.dir"));

should be changed to

    String s = CDSTestUtils.getOutputDir();
    File dir = CDSTestUtils.getOutputDirAsFile();