suite.addTestSuite(MoreFilesTest.class);
    return suite;
  }

  private static final FileSystem FS = FileSystems.getDefault();

  private static Path root() {
    return FS.getRootDirectories().iterator().next();
  }

  private Path tempDir;

  @Override
  protected void setUp() throws Exception {
    tempDir = Files.createTempDirectory("MoreFilesTest");
  }

  @Override

   * runner would run it even if we did, but part of the problem is b/230620681.
   */

  private static final FileSystem FS = FileSystems.getDefault();

  private static Path root() {
    return FS.getRootDirectories().iterator().next();
  }

  private Path tempDir;

  @Override
  protected void setUp() throws Exception {
    tempDir = Files.createTempDirectory("MoreFilesTest");
  }

  @Override

                } else if (classpathElement.getName().endsWith(".jar")) {
                    try (FileSystem jar = FileSystems.newFileSystem(classpathElement.toPath(), Map.of())) {
                        for (Path root : jar.getRootDirectories()) {
                            walkJavaFiles(root, ".class", addClassPackage);
                        }
                    }
                } else {