diff --git a/lib/every.rb b/lib/every.rb
index 712018c..f9ef787 100644
--- a/lib/every.rb
+++ b/lib/every.rb
@@ -1,6 +1,6 @@
 module Enumerable
   class Proxy
-    instance_methods.each { |m| undef_method(m) unless m.match(/^__/) }
+    instance_methods.each {|m| undef_method(m) unless m.match(/^__|object_id/) }
 
     def initialize(enum, method=:map)
       @enum, @method = enum, method
diff --git a/test/test_every.rb b/test/test_every.rb
index 7439eca..79b4a3e 100644
--- a/test/test_every.rb
+++ b/test/test_every.rb
@@ -5,11 +5,6 @@
 
 describe "Every" do
 
-  it "should be a basic object" do
-    whitelist = %w( __id__ __send__ method_missing ).to_set
-    Enumerable::Proxy.instance_methods.to_set.must_equal(whitelist.to_set)
-  end
-
   it "should pass message onto enumerable's items" do
     [1.4, 2.4, 3.4].every.floor.must_equal([1,2,3])
   end
@@ -21,4 +16,9 @@
   it "should allow blocks" do
     %w( axb dxf ).every.gsub(/x/) { 'y' }.must_equal(%w( ayb dyf ))
   end
+
+  it "should be a basic object" do
+    whitelist = %w( __id__ __send__ method_missing object_id ).every.to_s.to_set
+    Enumerable::Proxy.instance_methods.every.to_s.to_set.must_equal(whitelist)
+  end
 end