Though nowhere to be found in the official docs, this works just fine.

describe Facebook::Post do
  it_behaves_like :time_series
end

shared_examples_for :time_series do
  # shared example code
end

Rails Long Term Support

Rails LTS provides security patches for old versions of Ruby on Rails (2.3, 3.2, 4.2 and 5.2)

RSpec example groups can be named using symbols