Speed up tests marginally

rails_helper.rb

# ...
config.before(:suite) do
  connection = ActiveRecord::Base.connection
  query = connection.tables.map { |t| "ALTER TABLE #{t} SET UNLOGGED;" }.join("\n")

  # one line for each foreign_key at the end of your schema.rb
  ActiveRecord::Migration.remove_foreign_key "reports", "users"

  connection.execute(query)
end
# ...