How to distinguish tests written using Pytest from regular unit tests?

Tests written using Pytest differ from regular unit tests (for example, those written with unittest) in the following ways:

• No need to inherit from classes: in Pytest, you can write simple functions starting with test_, without creating classes.
• Use of powerful fixtures: Pytest provides a convenient fixture mechanism for setting up and tearing down test environments.
• More concise and readable syntax: there's no need to explicitly call assert methods from unittest, just use regular assert expressions.
• Extensibility and plugins: Pytest supports many plugins for parameterization, parallel execution, and other features.

Example of a Pytest test:

def test_sum():
    assert sum([1, 2, 3]) == 6

import pytest

@pytest.fixture
def sample_list():
    return [1, 2, 3]

def test_sum_with_fixture(sample_list):
    assert sum(sample_list) == 6

Unlike unittest, where tests are usually organized into classes, Pytest allows writing simpler and more flexible code.