@Test
public void testSetScrollable() throws Exception {

  msg.setTitle( "Title" );
  msg.setScrollable( true );
  msg.setMessage( "Message" );
  Thread msgThread = new Thread( () -> {
    try {
      msg.open();
    } catch ( Exception e ) {
      SwingMessageBoxTest.this.err = true;
    }
  } );
  msgThread.start();
  Thread.sleep( 1000 );
  assertTrue( msgThread.isAlive() );
  assertTrue( !err );
  msgThread.interrupt();
}