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

(51) And they make the angels who themselves are slaves of the Most Gracious (Allah) females. Did they witness their creation? Their testimony will be recorded, and they will be questioned!

(52) Say (O Muhammad صلى الله عليه و سلم): "If the Most Gracious (Allah) had a son (or children as you pretend), then I am the first of Allah's worshippers [who deny and refute this claim of yours (and the first to believe in Allah Alone and testify that He has no children)]." [Tafsir At-Tabari].

(53) On the Day when We shall seize you with the greatest seizure (punishment). Verily, We will exact retribution.

(54) We created them not except with truth (i.e. to examine and test those who are obedient and those who are disobedient and then reward the obedient ones and punish the disobedient ones), but most of them know not.

(55) Say: "Tell me! If this (Qur'an) is from Allah and you deny it, and a witness from among the Children of Israel ('Abdullah bin Salam رضي الله عنه) testifies that [this Qur'an is from Allah (like the Taurat (Torah)], and he believed (embraced Islam) while you are too proud (to believe)." Verily, Allah guides not the people who are Zalimun (polytheists, disbelievers and wrong-doers).

(56) So, when you meet (in fight - Jihad in Allah's Cause) those who disbelieve, smite (their) necks till when you have killed and wounded many of them, then bind a bond firmly (on them, i.e. take them as captives). Thereafter (is the time) either for generosity (i.e. free them without ransom), or ransom (according to what benefits Islam), until the war lays down its burden. Thus [you are ordered by Allah to continue in carrying out Jihad against the disbelievers till they embrace Islam and are saved from the punishment in the Hell-fire or at least come under your protection], but if it had been Allah's Will, He Himself could certainly have punished them (without you). But (He lets you fight) in order to test some of you with others. But those who are killed in the Way of Allah, He will never let their deeds be lost.

(57) And surely, We shall try you till We test those who strive hard (for the Cause of Allah) and As-Sabirun (the patient), and We shall test your facts (i.e. the one who is a liar, and the one who is truthful).

(58) Verily, those who lower their voices in the presence of Allah's Messenger (صلى الله عليه وسلم), they are the ones whose hearts Allah has tested for piety. For them is forgiveness and a great reward.

(59) Indeed he (Muhammad صلى الله عليه وسلم) did see of the Greatest Signs, of his Lord (Allah).

(60) Verily, We are sending the she-camel as a test for them. So watch them [O Salih عليه السلام], and be patient!