rake spec on RubyMotion Hello World app

gistfile1.txt

$ rake spec
     Build ./build/iPhoneSimulator-5.1-Development
  Simulate ./build/iPhoneSimulator-5.1-Development/Hello_spec.app
Application 'Hello'
  - has one window [FAILED]

Bacon::Error: 0.==(1) failed
	spec.rb:553:in `satisfy:': Application 'Hello' - has one window
	spec.rb:567:in `method_missing:'
	spec.rb:183:in `block in run_spec_block'
	 4:in `execute_block'
	spec.rb:183:in `run_spec_block'
	spec.rb:198:in `run'

1 specifications (1 requirements), 1 failures, 0 errors
rake aborted!
Command failed with status (1): [DYLD_FRAMEWORK_PATH="/Applications/Xcode.a...]

Tasks: TOP => simulator
(See full trace by running task with --trace)