Ruby on Rails 6 with RSpec: ActionView::Template::Error

There is a big chance that after updating your project to rails 6.0.0 your controller specs will break with:

ActionView::Template::Error: wrong number of arguments (given 2, expected 1)

The only solution that currently works is to update rspec-rails to version 4.0.0.beta2.

# Gemfile
group :test do
  gem 'rspec-rails', '~> 4.0.0.beta2'
end

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