diff --git a/runtime/compiler/rubyunit.vim b/runtime/compiler/rubyunit.vim
index 93a0c8e..ed0639b 100644
--- a/runtime/compiler/rubyunit.vim
+++ b/runtime/compiler/rubyunit.vim
@@ -17,6 +17,8 @@
 set cpo-=C
 
 CompilerSet makeprg=testrb
+" CompilerSet makeprg=ruby\ -Itest
+" CompilerSet makeprg=m
 
 CompilerSet errorformat=\%W\ %\\+%\\d%\\+)\ Failure:,
 			\%C%m\ [%f:%l]:,