diff --git a/test/benchmark.rb b/test/benchmark.rb
index d5a6c3e6..b83814e9 100644
--- a/test/benchmark.rb
+++ b/test/benchmark.rb
@@ -48,12 +48,13 @@ module Haml
 
     obj = Object.new
     Haml::Engine.new(haml_template).def_method(obj, :haml)
-    erb    = ERB.new(erb_template, nil, '-')
+    erb = ERB.new(erb_template, nil, '-')
+    obj.instance_eval("def erb; #{erb.src}; end")
     Erubis::Eruby.new(erb_template).def_method(obj, :erubis)
     mab = Markaby::Template.new(markaby_template)
     times = Benchmark.bmbm do |b|
       b.report("haml:")   { runs.times { obj.haml      } }
-      b.report("erb:")    { runs.times { erb.render    } }
+      b.report("erb:")    { runs.times { obj.erb       } }
       b.report("erubis:") { runs.times { obj.erubis    } }
       b.report("mab:")    { runs.times { mab.render    } }
     end