def test_cant_mouseover(browser, app_url):
    """lxml-based drivers should not be able to put the mouse over the element"""
    browser.visit(app_url)
    with pytest.raises(NotImplementedError):
        browser.find_by_css("#visible").mouse_over()
lxml-based drivers should not be able to put the mouse over the element
tests/test_all_lxml_drivers/test_lxml_drivers.py