return errors.New("unexpected HelloRetryRequest")
			}
			return nil
		},
	}
	runServerTestTLS13(t, test)
}

// TestHandshakeServerUnsupportedKeyShare tests a client that sends a key share
// that's not in the supported groups list.
func TestHandshakeServerUnsupportedKeyShare(t *testing.T) {
	pk, _ := ecdh.X25519().GenerateKey(rand.Reader)
	clientHello := &clientHelloMsg{
		vers:               VersionTLS12,