Remove the check for writable var dir, it has to be done later on

    $opt_vardir= "$glob_mysql_test_dir/$opt_vardir";

  }

  # Ensure a proper error message 

  mkpath("$opt_vardir");

  unless ( -d $opt_vardir and -w $opt_vardir )

  {

    mtr_error("Writable 'var' directory is needed, use the '--vardir' option");

  }

  # --------------------------------------------------------------------------

  # Set tmpdir

  # --------------------------------------------------------------------------