Ruby 1.9.3p0 Rails 3.1.3 Rake 0.9.2.2 breaks on rake db:migrate

log

pax@ubuntu:~/projects/missionhub$ ruby -v
ruby 1.9.3p0 (2011-10-30 revision 33570) [i686-linux]
pax@ubuntu:~/projects/missionhub$ rails -v
Rails 3.1.3
pax@ubuntu:~/projects/missionhub$ rake -V
rake, version 0.9.2.2
pax@ubuntu:~/projects/missionhub$ bundle exec rake db:migrate --trace
DEPRECATION WARNING: Yajl's JSON gem compatibility API is going to be removed in 2.0
** Invoke db:migrate (first_time)
** Invoke environment (first_time)
** Execute environment
** Invoke db:load_config (first_time)
** Invoke rails_env (first_time)
** Execute rails_env
** Execute db:load_config
** Execute db:migrate
** Invoke db:schema:dump (first_time)
** Invoke environment 
** Invoke db:load_config 
** Execute db:schema:dump
/home/pax/.rvm/rubies/ruby-1.9.3-p0/lib/ruby/1.9.1/test/unit.rb:167:in `block in non_options': file not found: db:migrate (ArgumentError)
	from /home/pax/.rvm/rubies/ruby-1.9.3-p0/lib/ruby/1.9.1/test/unit.rb:146:in `map!'
	from /home/pax/.rvm/rubies/ruby-1.9.3-p0/lib/ruby/1.9.1/test/unit.rb:146:in `non_options'
	from /home/pax/.rvm/rubies/ruby-1.9.3-p0/lib/ruby/1.9.1/test/unit.rb:207:in `non_options'
	from /home/pax/.rvm/rubies/ruby-1.9.3-p0/lib/ruby/1.9.1/test/unit.rb:52:in `process_args'
	from /home/pax/.rvm/rubies/ruby-1.9.3-p0/lib/ruby/1.9.1/minitest/unit.rb:891:in `_run'
	from /home/pax/.rvm/rubies/ruby-1.9.3-p0/lib/ruby/1.9.1/minitest/unit.rb:884:in `run'
	from /home/pax/.rvm/rubies/ruby-1.9.3-p0/lib/ruby/1.9.1/test/unit.rb:21:in `run'
	from /home/pax/.rvm/rubies/ruby-1.9.3-p0/lib/ruby/1.9.1/test/unit.rb:326:in `block (2 levels) in autorun'
	from /home/pax/.rvm/rubies/ruby-1.9.3-p0/lib/ruby/1.9.1/test/unit.rb:27:in `run_once'
	from /home/pax/.rvm/rubies/ruby-1.9.3-p0/lib/ruby/1.9.1/test/unit.rb:325:in `block in autorun'

#-----------------------------

pax@ubuntu:~/projects/missionhub$ ruby -v
ruby 1.9.2p271 (2011-05-31 revision 31856) [i686-linux]
pax@ubuntu:~/projects/missionhub$ rails -v
Rails 3.1.3
pax@ubuntu:~/projects/missionhub$ bundle exec rake -V
rake, version 0.9.2.2

pax@ubuntu:~/projects/missionhub$ bundle exec rake db:migrate
DEPRECATION WARNING: Yajl's JSON gem compatibility API is going to be removed in 2.0
Loaded suite /home/pax/.rvm/gems/ruby-1.9.2-p180@missionhub/bin/rake
Started

Finished in 0.001118 seconds.

0 tests, 0 assertions, 0 failures, 0 errors, 0 skips

Test run options: --seed 51475

cool~ flavorjones' solution works quite well.

I ran into this issue with flexmock as well--same fix