assert_se(sd_dhcp6_client_set_ifindex(client, 42) == 0);
assert_se(sd_dhcp6_client_set_local_address(client, &address) >= 0);
assert_se(sd_dhcp6_client_set_information_request(client, is_information_request_enabled) == 0);
+ dhcp6_client_set_test_mode(client, true);
assert_se(sd_dhcp6_client_start(client) >= 0);