Report method with io.sync = self.old_sync

report1.rb

def report # :nodoc:
  super
 
  io.puts "before sync"
  io.sync = self.old_sync
  io.puts "after sync"
 
  io.puts unless options[:verbose] # finish the dots
  io.puts
  io.puts statistics
  io.puts aggregated_results
  io.puts summary
end

result1

rack-simple_auth (master*) $ bundle exec rake
/home/benny/.rubies/rbx/bin/rbx -I"lib:test:bin:ext:controllers:helpers:models" -I"/home/benny/.rubies/rbx/gems/gems/rake-10.3.1/lib" "/home/benny/.rubies/rbx/gems/gems/rake-10.3.1/lib/rake/rake_test_loader.rb" "test/rack/simple_auth/hmac/hmac_fail_run_test.rb" "test/rack/simple_auth/hmac/hmac_fail_test.rb" "test/rack/simple_auth/hmac/hmac_test.rb" 
Run options: --seed 56790

# Running:

..................before sync
rack-simple_auth (master*) $