I''m trying to setup a Rake script to run all my IronRuby rspec tests. The tests need to have access to internal constructors and methods. IronRuby supports this with the -X:PrivateBinding switch on ir.exe. So, for example, if my test is called some_tests.rb, the following command works: ir -X:PrivateBinding -S spec some_tests.rb However, when I try to run rake that way it bombs out. To repo, follow these steps: Write a rakefile like the following: task :test do puts "TEST PASSED" end Running this command will succeed: ir -S rake test Running this command will fail: ir -X:PrivateBinding -S rake test with the following error: C:/IronRuby 1.1/lib/ironruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:1275: syntax error, unexpected `.'' I''m running IronRuby 1.1.0.0 on .NET 4.0.30319.1 with rake 0.8.7. I also posted this question to Stack Overflow: http://stackoverflow.com/questions/3383365/ironruby-rake-and-xprivatebrowsing @ironshay suggested I post it here as well. Thanks, Kevin -- Posted via http://www.ruby-forum.com/.