I use Pytest 3.6.4.

When I import from pytest_selenium import pytest_selenium and then use pytest_selenium in conftest.py I get PluginValidationError: unknown hook.

This error has been also encountered by some users:

• jantman/biweeklybudget@8184571
• Unknown hook with latest pytest pytest-django#607
• shawnbrown/datatest@5ad76f3

How is one expected to deal with it?