Concerning saying vayechulu on friday night as eidus, according to the misha berurah can one say it with a woman (wife or mother), or with a relative when praying alone? Can one be yotzei at kiddush? Or on shabbos day itself?
According to the Mishnah Berurah, vayechulu must be recited together with somebody else. It can be said with one’s relatives or with one’s wife (Halichos Shlomo 14:5), one cannot be yotzei at kiddush (because it has to be said together with somebody else), and it must be said on Friday night alone.
Although of saying vayechulu is giving testimony, it does not have all the regular parameteres of eidus (even according to the Mishnah Berurah).