When religious practice is treated as a "test", the key question is whether it is a sincere path of worship or a tool of human pressure. Islam affirms outward practice, but it does not allow people to replace faith, mercy, and knowledge with mere gatekeeping.
The concern stated at its strongest
The objection is serious: if followers demand visible practices - prayer, fasting, dress, diet, public rituals - as proof that someone is "really" religious, this can become a conformity test. It may reward social obedience more than truth, make doubters feel unsafe, and give communities power to shame or exclude people. A critic may say: if a religion is true, it should not need performative tests of loyalty.
That criticism has force when people invent tests, exaggerate minor matters, or treat struggling believers as hypocrites. Islam does not defend that behavior.
Islam does require embodied faith
Islam is not only a set of private ideas. It is belief, worship, character, and law. The Quran repeatedly joins faith with righteous deeds. Prayer, fasting, charity, and other acts are not arbitrary badges; they are forms of worship meant to train the soul and bring a person into obedience to Allah.
And they were not commanded except to worship Allah, sincere to Him in religion, inclining to truth, and to establish prayer and to give zakah. And that is the correct religion.
Quran 98:5
The Prophet (PBUH) also taught that Islam has visible pillars:
Islam is built upon five: testifying that there is no god but Allah and that Muhammad is the Messenger of Allah, establishing prayer, giving zakah, pilgrimage to the House, and fasting Ramadan.
Sahih al-Bukhari and Sahih Muslim
So yes, Islam has practices by which commitment becomes real in the body and in daily life. A faith that never asks anything of the person is not the faith taught by the Quran.
But practice is not a weapon for people to own others
At the same time, Islam distinguishes between divine obligations and social policing. No human being can see the heart. A person's outward Islam has legal and communal significance, but sincerity belongs to Allah alone.
There shall be no compulsion in religion. The right way has become distinct from error.
Quran 2:256
Actions are only by intentions, and each person will have only what he intended.
Sahih al-Bukhari and Sahih Muslim
This means a practice can be required as worship without becoming a license for cruelty. Parents may teach. Scholars may clarify obligations. A community may uphold public norms. But humiliating people, inventing loyalty tests, or declaring hearts false is not piety.
What it proves - and what it does not
Demanding religious practice can establish that a religion is not merely theoretical. It can show that Islam expects discipline, submission, and public moral responsibility. It can also help distinguish serious commitment from casual affiliation in some practical settings.
But it does not, by itself, prove that Islam is true. Truth is established by revelation, reason, the Quran, the Prophet's (PBUH) message, and the coherence of the faith. Nor does outward practice prove inward sincerity. A person may perform a ritual with hypocrisy, while another may be weak, learning, or struggling yet still have faith.
So the fair answer is this: religious practices in Islam are real obligations, not empty tests. But when followers turn them into tools of domination, suspicion, or ego, they have misunderstood the very worship they claim to defend.