diff --git a/test/test_helper.rb b/test/test_helper.rb
index 2ce24497ffdac163349188ccbd23cadd8d551c15..2784e7b07c861d234f0a11cae5a76eee12a522b6 100644
--- a/test/test_helper.rb
+++ b/test/test_helper.rb
@@ -1,6 +1,7 @@
 require 'simplecov'
 SimpleCov.start do
   add_filter "/test/"
+  add_filter "/vendor/ruby"
 end
 
 require 'minitest/autorun'