}
	if stdout.String() != text {
		t.Errorf("got stdout %q, stderr %q; want %q on stdout", stdout.String(), stderr.String(), text)
	}
}

func TestExtraFilesRace(t *testing.T) {
	if runtime.GOOS == "windows" {
		maySkipHelperCommand("describefiles")
		t.Skip("no operating system support; skipping")
	}
	t.Parallel()

	listen := func() net.Listener {