diff --git a/Gemfile.lock b/Gemfile.lock
index f300f4b4..8d009c00 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,7 +1,7 @@
 PATH
   remote: .
   specs:
-    memcached (1.7.2)
+    memcached (1.8.0)
 
 GEM
   remote: https://rubygems.org/
diff --git a/Rakefile b/Rakefile
index 89ee32a3..5f68dea1 100644
--- a/Rakefile
+++ b/Rakefile
@@ -107,6 +107,10 @@ def with_vm(vm, cmd)
   end
 end
 
+task :test_20 do
+  with_vm("/usr/bin/ruby", "test")
+end
+
 task :test_19 do
   with_vm("/opt/local/bin/ruby1.9", "test")
 end
@@ -115,7 +119,7 @@ task :test_rbx do
   with_vm("/usr/local/rubinius/1.2.4/bin/rbx", "test")
 end
 
-task :test_all => [:test_19, :test_rbx]
+task :test_all => [:test_20, :test_19, :test_rbx]
 
 task :prerelease => [:manifest, :test_all, :install]