Output of `rake` for json_schema_tools v0.8.8 when Rails 4 is installed.

gistfile1.txt

{15:23}[2.0.0]~/repos/json_schema_tools:c1819d7 ✓ ➭ bundle install
The source :rubygems is deprecated because HTTP requests are insecure.
Please change your source to 'https://rubygems.org' if possible, or 'http://rubygems.org' if not.
Resolving dependencies...
Using rake (10.1.0) 
Using i18n (0.6.4) 
Using minitest (4.7.5) 
Using multi_json (1.7.7) 
Using atomic (1.1.9) 
Using thread_safe (0.1.0) 
Using tzinfo (0.3.37) 
Using activesupport (4.0.0) 
Using builder (3.1.4) 
Using activemodel (4.0.0) 
Using diff-lcs (1.2.4) 
Using json (1.8.0) 
Using json_schema_tools (0.0.8) from source at . 
Using rspec-core (2.13.1) 
Using rspec-expectations (2.13.0) 
Using rspec-mocks (2.13.1) 
Using rspec (2.13.0) 
Using simplecov-html (0.7.1) 
Using simplecov (0.7.1) 
Using bundler (1.3.5) 
Your bundle is complete!
Use `bundle show [gemname]` to see where a bundled gem is installed.

===================================================================

{15:23}[2.0.0]~/repos/json_schema_tools:c1819d7 ✓ ➭ rake
/home/andy/.rvm/rubies/ruby-2.0.0-p195/bin/ruby -S rspec ./spec/schema_tools/cleaner_spec.rb ./spec/schema_tools/hash_spec.rb ./spec/schema_tools/klass_factory_spec.rb ./spec/schema_tools/modules/attributes_spec.rb ./spec/schema_tools/reader_spec.rb
/home/andy/.rvm/gems/ruby-2.0.0-p195/gems/activemodel-4.0.0/lib/active_model/validations/format.rb:4:in `<module:Validations>': uninitialized constant ActiveModel::Validations::EachValidator (NameError)
	from /home/andy/.rvm/gems/ruby-2.0.0-p195/gems/activemodel-4.0.0/lib/active_model/validations/format.rb:3:in `<module:ActiveModel>'
	from /home/andy/.rvm/gems/ruby-2.0.0-p195/gems/activemodel-4.0.0/lib/active_model/validations/format.rb:1:in `<top (required)>'
	from /home/andy/.rvm/gems/ruby-2.0.0-p195/gems/activemodel-4.0.0/lib/active_model/validations.rb:379:in `require'
	from /home/andy/.rvm/gems/ruby-2.0.0-p195/gems/activemodel-4.0.0/lib/active_model/validations.rb:379:in `block in <top (required)>'
	from /home/andy/.rvm/gems/ruby-2.0.0-p195/gems/activemodel-4.0.0/lib/active_model/validations.rb:379:in `each'
	from /home/andy/.rvm/gems/ruby-2.0.0-p195/gems/activemodel-4.0.0/lib/active_model/validations.rb:379:in `<top (required)>'
	from /home/andy/repos/json_schema_tools/lib/schema_tools/modules/validations.rb:2:in `require'
	from /home/andy/repos/json_schema_tools/lib/schema_tools/modules/validations.rb:2:in `<top (required)>'
	from /home/andy/repos/json_schema_tools/lib/schema_tools.rb:6:in `require'
	from /home/andy/repos/json_schema_tools/lib/schema_tools.rb:6:in `<top (required)>'
	from /home/andy/repos/json_schema_tools/lib/json_schema_tools.rb:1:in `require'
	from /home/andy/repos/json_schema_tools/lib/json_schema_tools.rb:1:in `<top (required)>'
	from /home/andy/repos/json_schema_tools/spec/spec_helper.rb:13:in `require'
	from /home/andy/repos/json_schema_tools/spec/spec_helper.rb:13:in `<top (required)>'
	from /home/andy/repos/json_schema_tools/spec/schema_tools/cleaner_spec.rb:1:in `require'
	from /home/andy/repos/json_schema_tools/spec/schema_tools/cleaner_spec.rb:1:in `<top (required)>'
	from /home/andy/.rvm/gems/ruby-2.0.0-p195/gems/rspec-core-2.13.1/lib/rspec/core/configuration.rb:819:in `load'
	from /home/andy/.rvm/gems/ruby-2.0.0-p195/gems/rspec-core-2.13.1/lib/rspec/core/configuration.rb:819:in `block in load_spec_files'
	from /home/andy/.rvm/gems/ruby-2.0.0-p195/gems/rspec-core-2.13.1/lib/rspec/core/configuration.rb:819:in `each'
	from /home/andy/.rvm/gems/ruby-2.0.0-p195/gems/rspec-core-2.13.1/lib/rspec/core/configuration.rb:819:in `load_spec_files'
	from /home/andy/.rvm/gems/ruby-2.0.0-p195/gems/rspec-core-2.13.1/lib/rspec/core/command_line.rb:22:in `run'
	from /home/andy/.rvm/gems/ruby-2.0.0-p195/gems/rspec-core-2.13.1/lib/rspec/core/runner.rb:80:in `run'
	from /home/andy/.rvm/gems/ruby-2.0.0-p195/gems/rspec-core-2.13.1/lib/rspec/core/runner.rb:17:in `block in autorun'
Coverage report generated for RSpec to /home/andy/repos/json_schema_tools/coverage. 35 / 140 LOC (25.0%) covered.
rake aborted!
/home/andy/.rvm/rubies/ruby-2.0.0-p195/bin/ruby -S rspec ./spec/schema_tools/cleaner_spec.rb ./spec/schema_tools/hash_spec.rb ./spec/schema_tools/klass_factory_spec.rb ./spec/schema_tools/modules/attributes_spec.rb ./spec/schema_tools/reader_spec.rb failed
/home/andy/.rvm/gems/ruby-2.0.0-p195/gems/rspec-core-2.13.1/lib/rspec/core/rake_task.rb:156:in `run_task'
/home/andy/.rvm/gems/ruby-2.0.0-p195/gems/rspec-core-2.13.1/lib/rspec/core/rake_task.rb:124:in `block (2 levels) in initialize'
/home/andy/.rvm/gems/ruby-2.0.0-p195/gems/rspec-core-2.13.1/lib/rspec/core/rake_task.rb:122:in `block in initialize'
/home/andy/.rvm/gems/ruby-2.0.0-p195/bin/ruby_noexec_wrapper:14:in `eval'
/home/andy/.rvm/gems/ruby-2.0.0-p195/bin/ruby_noexec_wrapper:14:in `<main>'
Tasks: TOP => default => spec
(See full trace by running task with --trace)