NameError: uninitialized constant Rails::TestTask

Question

I put this code inside my Rakefile in order to be able to run tests from an additional folder "test/classes" (not just from test/models, test/controllers etc):

# Adding test/classes directory to rake test.
namespace :test do # line 9
  desc "Test tests/classes/* code"
  Rails::TestTask.new(parsers: 'test:prepare') do |t| # line 11
    t.pattern = 'test/classes/**/*_test.rb'
  end
end

Rake::Task['test:run'].enhance ["test:classes"]

This code works perfectly when I run rails test.

But when I run rails db:migrate, I get this error:

NameError: uninitialized constant Rails::TestTask
/Users/Developer/project/Rakefile:11:in `block in <top (required)>'
/Users/Developer/project/Rakefile:9:in `<top (required)>'

What do I do to get rid of the error, but still be able to load test files from

Answer 1

insert

require 'rake/testtask'

into Rakefile

Answer 2

I saw this during a Rails 5.2 upgrade (from Rails 4.2). The fix for me was to rename Rails::TestTask to Rake::TestTask everywhere.