Note You do NOT need to run migrations to run tests
bundle install
bundle exec rspec
BUNDLE_GEMFILE=gemfiles/rails-master.gemfile bundle install
BUNDLE_GEMFILE=gemfiles/rails-master.gemfile bundle exec rspec
BUNDLE_GEMFILE=gemfiles/rails-5-0-stable.gemfile bundle install
BUNDLE_GEMFILE=gemfiles/rails-5-0-stable.gemfile bundle exec rspec
Note: the dummy app uses SQLite3
cd spec/dummy
rake db:migrate
rails server