RSpec Error - "Invalid Option"

I keep getting an issue when running RSpec with Autotest. My ~/.autotest file looks like this:

require 'autotest/growl' 
require 'autotest/fsevent' 
Autotest.add_hook :initialize do |autotest| 
        autotest.add_mapping(/^spec\/requests\/.*_spec\.rb$/) do 
        autotest.files_matching(/^spec\/requests\/.*_spec\.rb$/) 
        end 
end 

Any thoughts on what's wrong?

bundle exec /Users/TTS/.rvm/rubies/ruby-1.9.2-p136/bin/ruby -S /Users/ 
TTS/.rvm/gems/ruby-1.9.2-p136/gems/rspec-core-2.3.1/bin/rspec --tty '/ 
Users/TTS/Rails/sample_app/spec/controllers/pages_controller_spec.rb' 
'/Users/TTS/Rails/sample_app/spec/controllers/ 
sessions_controller_spec.rb' '/Users/TTS/Rails/sample_app/spec/ 
controllers/users_controller_spec.rb' '/Users/TTS/Rails/sample_app/ 
spec/models/user_spec.rb' '/Users/TTS/Rails/sample_app/spec/requests/ 
layout_links_spec.rb' '/Users/TTS/Rails/sample_app/spec/requests/ 
users_spec.rb' 
/Users/TTS/.rvm/gems/ruby-1.9.2-p136/gems/rspec-core-2.0.1/lib/rspec/ 
core/option_parser.rb:18:in `parse!': invalid option: --tty 
(OptionParser::InvalidOption) 
        from /Users/TTS/.rvm/gems/ruby-1.9.2-p136/gems/rspec-core-2.0.1/lib/ 
rspec/core/option_parser.rb:4:in `parse!' 
        from /Users/TTS/.rvm/gems/ruby-1.9.2-p136/gems/rspec-core-2.0.1/lib/ 
rspec/core/configuration_options.rb:64:in `parse_command_line_options' 
        from /Users/TTS/.rvm/gems/ruby-1.9.2-p136/gems/rspec-core-2.0.1/lib/ 
rspec/core/configuration_options.rb:46:in `parse_options' 
        from /Users/TTS/.rvm/gems/ruby-1.9.2-p136/gems/rspec-core-2.开发者_运维技巧0.1/lib/ 
rspec/core/runner.rb:41:in `run' 
        from /Users/TTS/.rvm/gems/ruby-1.9.2-p136/gems/rspec-core-2.0.1/lib/ 
rspec/core/runner.rb:10:in `block in autorun'

FWIW, my .autotest file is identical to yours, so that's not the problem. Can you verify what autotest gem you are running? (Mine is at 4.4.6 and is working fine.)