Spork error in Rails 4

Using RSpec, Rails
Preloading Rails environment
Loading Spork.prefork block...
no implicit conversion of nil into String (TypeError)
no implicit conversion of nil into String (TypeError)
/Users/me/Desktop/rails_stuff/rails_projects/sample_app/vendor/bundle/gems/activerecord-4.0.4/lib/active_record/connection_adapters/sqlite3_adapter.rb:26:in `initialize'
/Users/me/Desktop/rails_stuff/rails_projects/sample_app/vendor/bundle/gems/activerecord-4.0.4/lib/active_record/connection_adapters/sqlite3_adapter.rb:26:in `new'
/Users/me/Desktop/rails_stuff/rails_projects/sample_app/vendor/bundle/gems/activerecord-4.0.4/lib/active_record/connection_adapters/sqlite3_adapter.rb:26:in `sqlite3_connection'
/Users/me/Desktop/rails_stuff/rails_projects/sample_app/vendor/bundle/gems/activerecord-4.0.4/lib/active_record/connection_adapters/abstract/connection_pool.rb:440:in `new_connection'
/Users/me/Desktop/rails_stuff/rails_projects/sample_app/vendor/bundle/gems/activerecord-4.0.4/lib/active_record/connection_adapters/abstract/connection_pool.rb:450:in `checkout_new_connection'
/Users/me/Desktop/rails_stuff/rails_projects/sample_app/vendor/bundle/gems/activerecord-4.0.4/lib/active_record/connection_adapters/abstract/connection_pool.rb:421:in `acquire_connection'
/Users/me/Desktop/rails_stuff/rails_projects/sample_app/vendor/bundle/gems/activerecord-4.0.4/lib/active_record/connection_adapters/abstract/connection_pool.rb:356:in `block in checkout'
/Users/me/.rvm/rubies/ruby-2.1.1/lib/ruby/2.1.0/monitor.rb:211:in `mon_synchronize'
/Users/me/Desktop/rails_stuff/rails_projects/sample_app/vendor/bundle/gems/activerecord-4.0.4/lib/active_record/connection_adapters/abstract/connection_pool.rb:355:in `checkout'
/Users/me/Desktop/rails_stuff/rails_projects/sample_app/vendor/bundle/gems/activerecord-4.0.4/lib/active_record/connection_adapters/abstract/connection_pool.rb:265:in `block in connection'
/Users/me/.rvm/rubies/ruby-2.1.1/lib/ruby/2.1.0/monitor.rb:211:in `mon_synchronize'
/Users/me/Desktop/rails_stuff/rails_projects/sample_app/vendor/bundle/gems/activerecord-4.0.4/lib/active_record/connection_adapters/abstract/connection_pool.rb:264:in `connection'
/Users/me/Desktop/rails_stuff/rails_projects/sample_app/vendor/bundle/gems/activerecord-4.0.4/lib/active_record/connection_adapters/abstract/connection_pool.rb:546:in `retrieve_connection'
/Users/me/Desktop/rails_stuff/rails_projects/sample_app/vendor/bundle/gems/activerecord-4.0.4/lib/active_record/connection_handling.rb:79:in `retrieve_connection'
/Users/me/Desktop/rails_stuff/rails_projects/sample_app/vendor/bundle/gems/activerecord-4.0.4/lib/active_record/connection_handling.rb:53:in `connection'
/Users/me/Desktop/rails_stuff/rails_projects/sample_app/vendor/bundle/gems/activerecord-4.0.4/lib/active_record/migration.rb:796:in `current_version'
/Users/me/Desktop/rails_stuff/rails_projects/sample_app/vendor/bundle/gems/activerecord-4.0.4/lib/active_record/migration.rb:804:in `needs_migration?'
/Users/me/Desktop/rails_stuff/rails_projects/sample_app/vendor/bundle/gems/activerecord-4.0.4/lib/active_record/migration.rb:383:in `check_pending!'
/Users/me/Desktop/rails_stuff/rails_projects/sample_app/spec/spec_helper.rb:23:in `block in <top (required)>'
/Users/me/Desktop/rails_stuff/rails_projects/sample_app/vendor/bundle/gems/spork-1.0.0rc4/lib/spork.rb:24:in `prefork'
/Users/me/Desktop/rails_stuff/rails_projects/sample_app/spec/spec_helper.rb:6:in `<top (required)>'
/Users/me/Desktop/rails_stuff/rails_projects/sample_app/vendor/bundle/gems/activesupport-4.0.4/lib/active_support/dependencies.rb:223:in `load'
/Users/me/Desktop/rails_stuff/rails_projects/sample_app/vendor/bundle/gems/activesupport-4.0.4/lib/active_support/dependencies.rb:223:in `block in load'
/Users/me/Desktop/rails_stuff/rails_projects/sample_app/vendor/bundle/gems/activesupport-4.0.4/lib/active_support/dependencies.rb:214:in `load_dependency'
/Users/me/Desktop/rails_stuff/rails_projects/sample_app/vendor/bundle/gems/activesupport-4.0.4/lib/active_support/dependencies.rb:223:in `load'
/Users/me/Desktop/rails_stuff/rails_projects/sample_app/vendor/bundle/gems/spork-1.0.0rc4/lib/spork/test_framework.rb:138:in `block (2 levels) in preload'
/Users/me/Desktop/rails_stuff/rails_projects/sample_app/vendor/bundle/gems/spork-rails-4.0.0/lib/spork/app_framework/rails.rb:8:in `preload'
/Users/me/Desktop/rails_stuff/rails_projects/sample_app/vendor/bundle/gems/spork-1.0.0rc4/lib/spork/test_framework.rb:134:in `block in preload'
/Users/me/Desktop/rails_stuff/rails_projects/sample_app/vendor/bundle/gems/spork-1.0.0rc4/lib/spork.rb:62:in `exec_prefork'
/Users/me/Desktop/rails_stuff/rails_projects/sample_app/vendor/bundle/gems/spork-1.0.0rc4/lib/spork/test_framework.rb:120:in `preload'
/Users/me/Desktop/rails_stuff/rails_projects/sample_app/vendor/bundle/gems/spork-1.0.0rc4/lib/spork/run_strategy/forking.rb:25:in `preload'
/Users/me/Desktop/rails_stuff/rails_projects/sample_app/vendor/bundle/gems/spork-1.0.0rc4/lib/spork/runner.rb:75:in `run'
/Users/me/Desktop/rails_stuff/rails_projects/sample_app/vendor/bundle/gems/spork-1.0.0rc4/lib/spork/runner.rb:10:in `run'
/Users/me/Desktop/rails_stuff/rails_projects/sample_app/vendor/bundle/gems/spork-1.0.0rc4/bin/spork:10:in `<top (required)>'
/Users/me/.rvm/gems/ruby-2.1.1/bin/spork:23:in `load'
/Users/me/.rvm/gems/ruby-2.1.1/bin/spork:23:in `<main>'
/Users/me/.rvm/gems/ruby-2.1.1/bin/ruby_executable_hooks:15:in `eval'
/Users/me/.rvm/gems/ruby-2.1.1/bin/ruby_executable_hooks:15:in `<main>'

Figured it out... corrupt bundle. I needed to rebuild my bundle after upgrading from Mac OS 10.8 to 10.9. I deleted my vendor\bundle directory and ran bundle install.