RuntimeError: can't modify frozen Array when running rspec in rails 5.1

Question

I recently upgraded to Rails 5.1 from v4.3 and am now getting this error when running tests:

An error occurred while loading 

./spec/controllers/admin/capac         


        

Answer 1

Try setting config.eager_load = true in your environment file. This will load all files in memory during boot & will point out existing syntax errors in first place if any.