anchor.diff:      ssl_test_lib:check_result(Server, ok),
       ssl_test_lib:close(Server),
       ssl_test_lib:close_port(Client).
  +
  +
  +tls13_custom_groups_ssl_server_ssl_client() ->
  +    [{doc,"Test that ssl server can select a common group for key-exchange"}].
  +
  +tls13_custom_groups_ssl_server_ssl_client(Config) ->
  +    ClientOpts0 = ssl_test_lib:ssl_options(client_rsa_opts, Config),
  +    ServerOpts0 = ssl_test_lib:ssl_options(server_rsa_opts, Config),
  +
  +    %% Set versions
  +    ServerOpts = [{versions, ['tlsv1.2','tlsv1.3']},
  +                  {supported_groups, [x448, secp256r1, secp384r1]}|ServerOpts0],
  +    ClientOpts1 = [{versions, ['tlsv1.2','tlsv1.3']}|ClientOpts0],
  +    {ClientNode, ServerNode, Hostname} = ssl_test_lib:run_where(Config),
  +
  +    Server = ssl_test_lib:start_server([{node, ServerNode}, {port, 0},
  +					{from, self()},
  +					{mfa, {ssl_test_lib, send_recv_result_active, []}},
  +					{options, ServerOpts}]),
  +    Port = ssl_test_lib:inet_port(Server),
  +
  +    ClientOpts = [{supported_groups,[secp384r1, secp256r1, x25519]}|ClientOpts1],
  +
  +    Client = ssl_test_lib:start_client([{node, ClientNode}, {port, Port},
  +					{host, Hostname},
  +					{from, self()},
  +					{mfa, {ssl_test_lib, send_recv_result_active, []}},
  +					{options, ClientOpts}]),
  +
  +    ssl_test_lib:check_result(Server, ok, Client, ok),
  +    ssl_test_lib:close(Server),
  +    ssl_test_lib:close_port(Client).
  +
   
   tls13_hello_retry_request_ssl_server_openssl_client() ->
       [{doc,"Test that ssl server can request a new group when the client's first key share"
  
positive.code:     ssl_test_lib:close(Server),
      ssl_test_lib:close_port(Client).
  
  tls13_custom_groups_ssl_server_openssl_client() ->
      [{doc,"Test that ssl server can select a common group for key-exchange"}].
  
  
negative.code:      tls13_finished_verify_data,
       tls13_1_RTT_handshake,
       tls13_basic_ssl_server_openssl_client,
       tls13_basic_ssl_server_ssl_client,
       tls13_custom_groups_ssl_server_openssl_client,
       tls13_custom_groups_ssl_server_ssl_client,
       tls13_hello_retry_request_ssl_server_openssl_client,
       tls13_client_auth_empty_cert_alert_ssl_server_openssl_client,
       tls13_client_auth_empty_cert_ssl_server_openssl_client,
  