wg.Wait()
	checkErr(err1)
	checkErr(err2)
	cancel()
}

func TestLookupNoData(t *testing.T) {
	if runtime.GOOS == "plan9" {
		t.Skip("not supported on plan9")
	}

	mustHaveExternalNetwork(t)

	testLookupNoData(t, "default resolver")

	func() {
		defer forceGoDNS()()
		testLookupNoData(t, "forced go resolver")
	}()

	func() {
		defer forceCgoDNS()()