n, err := c1.Write(make([]byte, 1024))
	if n != 0 {
		t.Errorf("unexpected Write count: got %d, want 0", n)
	}
	checkForTimeoutError(t, err)
	n, err = c1.Read(make([]byte, 1024))
	if n != 0 {
		t.Errorf("unexpected Read count: got %d, want 0", n)
	}
	checkForTimeoutError(t, err)

	testRoundtrip(t, c1)
}

// testPresentTimeout tests that a past deadline set while there are pending