Why am I not getting colors with shoulda and test::unit?

I have 2 identical ruby setups. One of them is a VM of ubuntu running inside of windows. The other is a native ubuntu install. On the VM, my Test::Unit output is colored with green, yellow, and red.

Both of them are running ruby-1.9.2-p180, installed through rvm. Both of them have开发者_开发百科 exactly the same gems installed, as verified by bundle install. The code is exactly the same, because the source is stored in a dropbox folder. I have verified the $LOAD_PATH is exactly the same. Both consoles are capable of displaying color, because both display green when running bundle install.

What other possibilities are there?

I'd guess that you have different TERM environment variables inside the VM than you do outside the VM.