The word(s) "test" appears 78 time(s) in 68 verse(s) in Quran in Mohsin Khan translation.

(61) Indeed We have sent Our Messengers with clear proofs, and revealed with them the Scripture and the Balance (justice) that mankind may keep up justice. And We brought forth iron wherein is mighty power (in matters of war ), as well as many benefits for mankind, that Allah may test who it is that will help Him (His religion) and His Messengers in the unseen. Verily, Allah is All-Strong, All-Mighty.

(62) Then when they are about to attain their term appointed, either take them back in a good manner or part with them in a good manner. And take as witness two just persons from among you (Muslims). And establish the testimony for Allah. That will be an admonition given to him who believes in Allah and the Last Day. And whosoever fears Allah and keeps his duty to Him, He will make a way for him to get out (from every difficulty).

(63) And Maryam (Mary), the daughter of 'Imran who guarded her chastity. And We breathed into (the sleeve of her shirt or her garment) through Our Ruh [i.e. Jibril (Gabriel) ], and she testified to the truth of the Words of her Lord [i.e. believed in the Words of Allah: "Be!" - and he was; that is 'Îsa (Jesus), son of Maryam (Mary) as a Messenger of Allah], and (also believed in) His Scriptures, and she was of the Qanitun (i.e. obedient to Allah) .

(64) Who has created death and life that He may test you which of you is best in deed. And He is the All-Mighty, the Oft-Forgiving;

(65) And those who stand firm in their testimonies.

(66) Verily, it (Hell, or their denial of Prophet Muhammad صلى الله عليه وسلم, or the Day of Resurrection) is but one of the greatest (signs).

(67) But when there comes the greatest catastrophe (i.e. the Day of Recompense) -

(68) Then Allah will punish him with the greatest punishment.