Configure and use requests-mock for all tests without fussing with decorators or function params in your tests

conftest.py

import pytest
import requests_mock

# By autousing this yielding fixture, all tests with have requests_mock enabled with 
# the registered stubbed responses as defined here

@pytest.fixture(autouse=True)
def stub_or_disable_requests():
    with requests_mock.Mocker() as mocker:
        mocker.get('//example.com/mock1', text='example.com mock 1')
        mocker.get('/mock2', text='any domain mock 2')
        yield

test_requests.py

import pytest
import requests
import requests_mock

def test_unmocked_get():
    with pytest.raises(requests_mock.exceptions.NoMockAddress):
        requests.get("http://www.google.com")

def test_session():
    session = requests.Session()
    with pytest.raises(requests_mock.exceptions.NoMockAddress):
        session.get("http://www.google.com")

def test_mocked_get():
    response1 = requests.get("https://example.com/mock1")
    response2 = requests.get("https://example.com/mock2")
    with pytest.raises(requests_mock.exceptions.NoMockAddress):
        requests.get("https://anything.com/mock1")
    response4 = requests.get("https://anything.com/mock2")

    assert response1.text == "example.com mock 1"
    assert response2.text == "any domain mock 2"
    assert response4.text == "any domain mock 2"