In case your integration tests crash with a message like below, try to upgrade Capybara to a newer version (3.35.3 was good enough). You might encounter this issue when you enabled the w3c option in Selenium.
undefined method `log' for #<Selenium::WebDriver::Remote::W3C::Bridge:0x000055995647ded0>
Your affected code might look similar to this call below and will work after the upgrade again.
errors = page.driver.browser.manage.logs.get(:browser)