diff --git a/tasks/spec.rake b/tasks/spec.rake
index 38578d4b0..b83d31692 100644
--- a/tasks/spec.rake
+++ b/tasks/spec.rake
@@ -17,11 +17,13 @@ namespace :spec do
       t.rcov = false
     end
     t.rcov_opts = [
+      '--exclude', 'lib\\/compat',
       '--exclude', 'spec',
       '--exclude', '\\.rvm\\/gems',
       '--exclude', '1\\.8\\/gems',
       '--exclude', '1\\.9\\/gems',
-      '--exclude', '\\.rvm'
+      '--exclude', '\\.rvm',
+      '--exclude', '\\/Library\\/Ruby',
     ]
   end