pip/tests/functional/test_requests.py

import pytest


@pytest.mark.skipif
def test_timeout(script):
    result = script.pip(
        "--timeout", "0.01", "install", "-vvv", "INITools",
        expect_error=True,
    )
    assert (
        "Could not fetch URL https://pypi.org/simple/INITools/: "
        "timed out" in result.stdout
    )
    assert (
        "Could not fetch URL https://pypi.org/simple/: "
        "timed out" in result.stdout
    )