The easiest test one can do personally on these men, easily (no googling permitted during exam):
Ask them what are the five pillars of Islam?
What is shirk?
Who was the last Prophet (SAW)?
Which month the Quran came down?
Which angel brought it down to the Prophet (SAW)?
Recite at least one long Surat of the Quran and give its Urdu tarjumma with at least two experts of recitation present.
If the man isn't willing to do all of this to prove his religion to marry a girl he ostensibly loves then he either doesn't love her enough, isn't committed to his "new" religion, or he is a fraud.
@Taimur Khurram @Psychic @LeGenD @OsmanAli98 @Metanoia