MiniTest integration is counting ExpectationErrors as errors not failures

For example with Ruby v1.8.6 and MiniTest gem v1.3.1 :-

gem 'minitest'
require 'minitest/autorun'
require 'mocha'

class TempTest < MiniTest::Unit::TestCase
  
  def test_me
    mockee = mock()
    mockee.expects(:blah)
  end
  
end

E 
Finished in 0.001008 seconds.

  1) Error:
test_me(TempTest):
Mocha::ExpectationError: not all expectations were satisfied
unsatisfied expectations:
- expected exactly once, not yet invoked: #<Mock:0x617844>.blah(any_parameters)

method test_me in temp_test.rb at line 9
method run_test_suites in unit.rb at line 413
method each in unit.rb at line 407
method run_test_suites in unit.rb at line 407
method each in unit.rb at line 406
method run_test_suites in unit.rb at line 406
method run in unit.rb at line 386
method autorun in unit.rb at line 327
at top level in temp_test.rb at line 7

1 tests, 1 assertions, 0 failures, 1 errors, 0 skips

Should be :-

1 tests, 1 assertions, 1 failures, 0 errors, 0 skips