Dónde poner el tiempo de espera predeterminado de Capybara
# spec_helper.rb
# use default_max_wait_time, default_wait_time is deprecated
Capybara.default_max_wait_time = 5
# the feature test will wait up to 5 seconds
expect(page).to have_no_selector(:css, "p a#doesnotexist")
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