diff --git a/lib/vagrant.rb b/lib/vagrant.rb
index 839068211..6d3b38b18 100644
--- a/lib/vagrant.rb
+++ b/lib/vagrant.rb
@@ -9,6 +9,7 @@ module Vagrant
   # start small, but slowly move everything over.
 
   autoload :CLI,    'vagrant/cli'
+  autoload :Config, 'vagrant/config'
   autoload :Errors, 'vagrant/errors'
 
   module Command
@@ -40,7 +41,7 @@ I18n.load_path << File.expand_path("templates/locales/en.yml", Vagrant.source_ro
 # is not that day. Low hanging fruit for anyone wishing to do it.
 libdir = File.expand_path("lib/vagrant", Vagrant.source_root)
 Vagrant::GlobLoader.glob_require(libdir, %w{util/stacked_proc_runner
-  downloaders/base config provisioners/base provisioners/chef systems/base
+  downloaders/base provisioners/base provisioners/chef systems/base
   hosts/base})
 
 # Initialize the built-in actions
diff --git a/lib/vagrant/config.rb b/lib/vagrant/config.rb
index 1bac67f8c..abe270351 100644
--- a/lib/vagrant/config.rb
+++ b/lib/vagrant/config.rb
@@ -1,8 +1,6 @@
-module Vagrant
-  def self.config
-    Config.config
-  end
+require 'vagrant/config/base'
 
+module Vagrant
   class Config
     extend Util::StackedProcRunner
 
@@ -37,169 +35,6 @@ module Vagrant
         config_object
       end
     end
-  end
-
-  class Config
-    class Base
-      attr_accessor :env
-
-      def [](key)
-        send(key)
-      end
-
-      def to_json(*a)
-        instance_variables_hash.to_json(*a)
-      end
-
-      def instance_variables_hash
-        instance_variables.inject({}) do |acc, iv|
-          acc[iv.to_s[1..-1].to_sym] = instance_variable_get(iv) unless iv.to_sym == :@env
-          acc
-        end
-      end
-    end
-
-    class SSHConfig < Base
-      attr_accessor :username
-      attr_accessor :host
-      attr_accessor :port
-      attr_accessor :forwarded_port_key
-      attr_accessor :max_tries
-      attr_accessor :timeout
-      attr_writer :private_key_path
-      attr_accessor :forward_agent
-
-      # The attribute(s) below do nothing. They are just kept here to
-      # prevent syntax errors for backwards compat.
-      attr_accessor :password
-
-      def private_key_path
-        File.expand_path(@private_key_path, env.root_path)
-      end
-    end
-
-    class NFSConfig < Base
-      attr_accessor :map_uid
-      attr_accessor :map_gid
-    end
-
-    class VMConfig < Base
-      include Util::StackedProcRunner
-
-      attr_accessor :auto_port_range
-      attr_accessor :box
-      attr_accessor :box_url
-      attr_accessor :box_ovf
-      attr_accessor :base_mac
-      attr_accessor :boot_mode
-      attr_reader :forwarded_ports
-      attr_reader :shared_folders
-      attr_reader :network_options
-      attr_reader :hd_location
-      attr_accessor :disk_image_format
-      attr_accessor :provisioner
-      attr_writer :shared_folder_uid
-      attr_writer :shared_folder_gid
-      attr_accessor :system
-
-      # Represents a SubVM. This class is only used here in the VMs
-      # hash.
-      class SubVM
-        include Util::StackedProcRunner
-
-        def options
-          @options ||= {}
-        end
-      end
-
-      def initialize
-        @forwarded_ports = {}
-        @shared_folders = {}
-        @provisioner = nil
-        @network_options = []
-      end
-
-      def forward_port(name, guestport, hostport, options=nil)
-        options = {
-          :guestport  => guestport,
-          :hostport   => hostport,
-          :protocol   => "TCP",
-          :adapter    => 0,
-          :auto       => false
-        }.merge(options || {})
-
-        forwarded_ports[name] = options
-      end
-
-      def share_folder(name, guestpath, hostpath, opts=nil)
-        @shared_folders[name] = {
-          :guestpath => guestpath,
-          :hostpath => hostpath
-        }.merge(opts || {})
-      end
-
-      def network(ip, options=nil)
-        options = {
-          :ip => ip,
-          :netmask => "255.255.255.0",
-          :adapter => 1,
-          :name => nil
-        }.merge(options || {})
-
-        @network_options[options[:adapter]] = options
-      end
-
-      def hd_location=(val)
-        raise Exception.new("disk_storage must be set to a directory") unless File.directory?(val)
-        @hd_location=val
-      end
-
-      def shared_folder_uid
-        @shared_folder_uid || env.config.ssh.username
-      end
-
-      def shared_folder_gid
-        @shared_folder_gid || env.config.ssh.username
-      end
-
-      def customize(&block)
-        push_proc(&block)
-      end
-
-      def has_multi_vms?
-        !defined_vms.empty?
-      end
-
-      def defined_vms
-        @defined_vms ||= {}
-      end
-
-      def define(name, options=nil, &block)
-        options ||= {}
-        defined_vms[name.to_sym] ||= SubVM.new
-        defined_vms[name.to_sym].options.merge!(options)
-        defined_vms[name.to_sym].push_proc(&block)
-      end
-    end
-
-    class PackageConfig < Base
-      attr_accessor :name
-    end
-
-    class VagrantConfig < Base
-      attr_accessor :dotfile_name
-      attr_accessor :log_output
-      attr_writer :home
-      attr_accessor :host
-
-      def initialize
-        @home = nil
-      end
-
-      def home
-        @home ? File.expand_path(@home) : nil
-      end
-    end
 
     class Top < Base
       @@configures = []
@@ -215,13 +50,6 @@ module Vagrant
         end
       end
 
-      # Setup default configures
-      configures :package, PackageConfig
-      configures :nfs, NFSConfig
-      configures :ssh, SSHConfig
-      configures :vm, VMConfig
-      configures :vagrant, VagrantConfig
-
       def initialize(env=nil)
         self.class.configures_list.each do |key, klass|
           config = klass.new
@@ -249,3 +77,10 @@ module Vagrant
     end
   end
 end
+
+# The built-in configuration classes
+require 'vagrant/config/vagrant'
+require 'vagrant/config/ssh'
+require 'vagrant/config/nfs'
+require 'vagrant/config/vm'
+require 'vagrant/config/package'
diff --git a/lib/vagrant/config/base.rb b/lib/vagrant/config/base.rb
new file mode 100644
index 000000000..c7cd3e26c
--- /dev/null
+++ b/lib/vagrant/config/base.rb
@@ -0,0 +1,25 @@
+module Vagrant
+  class Config
+    # The base class for all configuration classes. This implements
+    # basic things such as the environment instance variable which all
+    # config classes need as well as a basic `to_json` implementation.
+    class Base
+      attr_accessor :env
+
+      def [](key)
+        send(key)
+      end
+
+      def to_json(*a)
+        { 'json_class' => self.class.name }.merge(instance_variables_hash).to_json(*a)
+      end
+
+      def instance_variables_hash
+        instance_variables.inject({}) do |acc, iv|
+          acc[iv.to_s[1..-1]] = instance_variable_get(iv) unless iv.to_sym == :@env
+          acc
+        end
+      end
+    end
+  end
+end
diff --git a/lib/vagrant/config/nfs.rb b/lib/vagrant/config/nfs.rb
new file mode 100644
index 000000000..68a222f9c
--- /dev/null
+++ b/lib/vagrant/config/nfs.rb
@@ -0,0 +1,10 @@
+module Vagrant
+  class Config
+    class NFSConfig < Base
+      Config.configures :nfs, self
+
+      attr_accessor :map_uid
+      attr_accessor :map_gid
+    end
+  end
+end
diff --git a/lib/vagrant/config/package.rb b/lib/vagrant/config/package.rb
new file mode 100644
index 000000000..2833ed641
--- /dev/null
+++ b/lib/vagrant/config/package.rb
@@ -0,0 +1,9 @@
+module Vagrant
+  class Config
+    class PackageConfig < Base
+      Config.configures :package, self
+
+      attr_accessor :name
+    end
+  end
+end
diff --git a/lib/vagrant/config/ssh.rb b/lib/vagrant/config/ssh.rb
new file mode 100644
index 000000000..32bf31a00
--- /dev/null
+++ b/lib/vagrant/config/ssh.rb
@@ -0,0 +1,24 @@
+module Vagrant
+  class Config
+    class SSHConfig < Base
+      Config.configures :ssh, self
+
+      attr_accessor :username
+      attr_accessor :host
+      attr_accessor :port
+      attr_accessor :forwarded_port_key
+      attr_accessor :max_tries
+      attr_accessor :timeout
+      attr_writer :private_key_path
+      attr_accessor :forward_agent
+
+      # The attribute(s) below do nothing. They are just kept here to
+      # prevent syntax errors for backwards compat.
+      attr_accessor :password
+
+      def private_key_path
+        File.expand_path(@private_key_path, env.root_path)
+      end
+    end
+  end
+end
diff --git a/lib/vagrant/config/vagrant.rb b/lib/vagrant/config/vagrant.rb
new file mode 100644
index 000000000..79ccfa35a
--- /dev/null
+++ b/lib/vagrant/config/vagrant.rb
@@ -0,0 +1,20 @@
+module Vagrant
+  class Config
+    class VagrantConfig < Base
+      Config.configures :vagrant, self
+
+      attr_accessor :dotfile_name
+      attr_accessor :log_output
+      attr_writer :home
+      attr_accessor :host
+
+      def initialize
+        @home = nil
+      end
+
+      def home
+        @home ? File.expand_path(@home) : nil
+      end
+    end
+  end
+end
diff --git a/lib/vagrant/config/vm.rb b/lib/vagrant/config/vm.rb
new file mode 100644
index 000000000..823eccbb0
--- /dev/null
+++ b/lib/vagrant/config/vm.rb
@@ -0,0 +1,104 @@
+module Vagrant
+  class Config
+    class VMConfig < Base
+      Config.configures :vm, self
+
+      include Util::StackedProcRunner
+
+      attr_accessor :auto_port_range
+      attr_accessor :box
+      attr_accessor :box_url
+      attr_accessor :box_ovf
+      attr_accessor :base_mac
+      attr_accessor :boot_mode
+      attr_reader :forwarded_ports
+      attr_reader :shared_folders
+      attr_reader :network_options
+      attr_reader :hd_location
+      attr_accessor :disk_image_format
+      attr_accessor :provisioner
+      attr_writer :shared_folder_uid
+      attr_writer :shared_folder_gid
+      attr_accessor :system
+
+      # Represents a SubVM. This class is only used here in the VMs
+      # hash.
+      class SubVM
+        include Util::StackedProcRunner
+
+        def options
+          @options ||= {}
+        end
+      end
+
+      def initialize
+        @forwarded_ports = {}
+        @shared_folders = {}
+        @provisioner = nil
+        @network_options = []
+      end
+
+      def forward_port(name, guestport, hostport, options=nil)
+        options = {
+          :guestport  => guestport,
+          :hostport   => hostport,
+          :protocol   => "TCP",
+          :adapter    => 0,
+          :auto       => false
+        }.merge(options || {})
+
+        forwarded_ports[name] = options
+      end
+
+      def share_folder(name, guestpath, hostpath, opts=nil)
+        @shared_folders[name] = {
+          :guestpath => guestpath,
+          :hostpath => hostpath
+        }.merge(opts || {})
+      end
+
+      def network(ip, options=nil)
+        options = {
+          :ip => ip,
+          :netmask => "255.255.255.0",
+          :adapter => 1,
+          :name => nil
+        }.merge(options || {})
+
+        @network_options[options[:adapter]] = options
+      end
+
+      def hd_location=(val)
+        raise Exception.new("disk_storage must be set to a directory") unless File.directory?(val)
+        @hd_location=val
+      end
+
+      def shared_folder_uid
+        @shared_folder_uid || env.config.ssh.username
+      end
+
+      def shared_folder_gid
+        @shared_folder_gid || env.config.ssh.username
+      end
+
+      def customize(&block)
+        push_proc(&block)
+      end
+
+      def has_multi_vms?
+        !defined_vms.empty?
+      end
+
+      def defined_vms
+        @defined_vms ||= {}
+      end
+
+      def define(name, options=nil, &block)
+        options ||= {}
+        defined_vms[name.to_sym] ||= SubVM.new
+        defined_vms[name.to_sym].options.merge!(options)
+        defined_vms[name.to_sym].push_proc(&block)
+      end
+    end
+  end
+end
diff --git a/lib/vagrant/provisioners/chef.rb b/lib/vagrant/provisioners/chef.rb
index e0a6dc591..d6466c6e4 100644
--- a/lib/vagrant/provisioners/chef.rb
+++ b/lib/vagrant/provisioners/chef.rb
@@ -116,12 +116,12 @@ module Vagrant
           run_list << name
         end
 
-        def to_json(*a)
+        def instance_variables_hash
           # Overridden so that the 'json' key could be removed, since its just
           # merged into the config anyways
-          data = instance_variables_hash
-          data.delete(:json)
-          data.to_json(*a)
+          result = super
+          result.delete("json")
+          result
         end
       end
 
diff --git a/test/vagrant/config/base_test.rb b/test/vagrant/config/base_test.rb
new file mode 100644
index 000000000..74e1b1241
--- /dev/null
+++ b/test/vagrant/config/base_test.rb
@@ -0,0 +1,42 @@
+require "test_helper"
+
+class ConfigBaseTest < Test::Unit::TestCase
+  setup do
+    @base = Vagrant::Config::Base.new
+  end
+
+  should "forward [] access to methods" do
+    @base.expects(:foo).once
+    @base[:foo]
+  end
+
+  should "return a hash of instance variables" do
+    data = { "foo" => "bar", "bar" => "baz" }
+
+    data.each do |iv, value|
+      @base.instance_variable_set("@#{iv}".to_sym, value)
+    end
+
+    result = @base.instance_variables_hash
+    assert_equal data.length, result.length
+
+    data.each do |iv, value|
+      assert_equal value, result[iv]
+    end
+  end
+
+  context "converting to JSON" do
+    should "convert instance variable hash to json" do
+      @iv_hash = { "foo" => "bar" }
+      @base.expects(:instance_variables_hash).returns(@iv_hash)
+      @json = { "json_class" => @base.class.name }.merge(@iv_hash).to_json
+      assert_equal @json, @base.to_json
+    end
+
+    should "not include env in the JSON hash" do
+      @base.env = "FOO"
+      hash = @base.instance_variables_hash
+      assert !hash.has_key?(:env)
+    end
+  end
+end
diff --git a/test/vagrant/config/ssh_test.rb b/test/vagrant/config/ssh_test.rb
new file mode 100644
index 000000000..1d88e951a
--- /dev/null
+++ b/test/vagrant/config/ssh_test.rb
@@ -0,0 +1,13 @@
+require "test_helper"
+
+class ConfigSSHTest < Test::Unit::TestCase
+  setup do
+    @env = mock_environment
+    @env.stubs(:root_path).returns("foo")
+  end
+
+  should "expand any path when requesting the value" do
+    result = File.expand_path(@env.config.ssh[:private_key_path], @env.root_path)
+    assert_equal result, @env.config.ssh.private_key_path
+  end
+end
diff --git a/test/vagrant/config/vagrant_test.rb b/test/vagrant/config/vagrant_test.rb
new file mode 100644
index 000000000..87da78ebe
--- /dev/null
+++ b/test/vagrant/config/vagrant_test.rb
@@ -0,0 +1,18 @@
+require "test_helper"
+
+class ConfigVagrantTest < Test::Unit::TestCase
+  setup do
+    @config = Vagrant::Config::VagrantConfig.new
+  end
+
+  should "return nil if home is nil" do
+    File.expects(:expand_path).never
+    assert @config.home.nil?
+  end
+
+  should "expand the path if home is not nil" do
+    @config.home = "foo"
+    File.expects(:expand_path).with("foo").once.returns("result")
+    assert_equal "result", @config.home
+  end
+end
diff --git a/test/vagrant/config/vm_test.rb b/test/vagrant/config/vm_test.rb
new file mode 100644
index 000000000..f5a1478e1
--- /dev/null
+++ b/test/vagrant/config/vm_test.rb
@@ -0,0 +1,70 @@
+require "test_helper"
+
+class ConfigVMTest < Test::Unit::TestCase
+  setup do
+    @username = "mitchellh"
+
+    @env = mock_environment
+    @config = @env.config.vm
+    @env.config.ssh.username = @username
+  end
+
+  context "defining VMs" do
+    should "store the proc by name but not run it" do
+      foo = mock("proc")
+      foo.expects(:call).never
+
+      proc = Proc.new { foo.call }
+      @config.define(:name, &proc)
+      assert @config.defined_vms[:name].proc_stack.include?(proc)
+    end
+
+    should "store the options" do
+      @config.define(:name, :set => true)
+      assert @config.defined_vms[:name].options[:set]
+    end
+
+    should "not have multi-VMs by default" do
+      assert !@config.has_multi_vms?
+    end
+
+    should "have multi-VMs once one is specified" do
+      @config.define(:foo) {}
+      assert @config.has_multi_vms?
+    end
+  end
+
+  context "customizing" do
+    should "include the stacked proc runner module" do
+      assert @config.class.included_modules.include?(Vagrant::Util::StackedProcRunner)
+    end
+
+    should "add the customize proc to the proc stack" do
+      proc = Proc.new {}
+      @config.customize(&proc)
+      assert_equal [proc], @config.proc_stack
+    end
+  end
+
+  context "uid/gid" do
+    should "return the shared folder UID if set" do
+      @config.shared_folder_uid = "foo"
+      assert_equal "foo", @config.shared_folder_uid
+    end
+
+    should "return the SSH username if UID not set" do
+      @config.shared_folder_uid = nil
+      assert_equal @username, @config.shared_folder_uid
+    end
+
+    should "return the shared folder GID if set" do
+      @config.shared_folder_gid = "foo"
+      assert_equal "foo", @config.shared_folder_gid
+    end
+
+    should "return the SSH username if GID not set" do
+      @config.shared_folder_gid = nil
+      assert_equal @username, @config.shared_folder_gid
+    end
+  end
+end
diff --git a/test/vagrant/config_test.rb b/test/vagrant/config_test.rb
index 2ec8c585f..f8ec1b5b5 100644
--- a/test/vagrant/config_test.rb
+++ b/test/vagrant/config_test.rb
@@ -1,18 +1,6 @@
 require "test_helper"
 
 class ConfigTest < Test::Unit::TestCase
-  context "the ssh config" do
-    setup do
-      @env = mock_environment
-      @env.stubs(:root_path).returns("foo")
-    end
-
-    should "expand any path when requesting the value" do
-      result = File.expand_path(@env.config.ssh[:private_key_path], @env.root_path)
-      assert_equal result, @env.config.ssh.private_key_path
-    end
-  end
-
   context "adding configures" do
     should "forward the method to the Top class" do
       key = mock("key")
@@ -92,48 +80,6 @@ class ConfigTest < Test::Unit::TestCase
     end
   end
 
-  context "base class" do
-    setup do
-      @base = Vagrant::Config::Base.new
-    end
-
-    should "forward [] access to methods" do
-      @base.expects(:foo).once
-      @base[:foo]
-    end
-
-    should "return a hash of instance variables" do
-      data = { :foo => "bar", :bar => "baz" }
-
-      data.each do |iv, value|
-        @base.instance_variable_set("@#{iv}".to_sym, value)
-      end
-
-      result = @base.instance_variables_hash
-      assert_equal data.length, result.length
-
-      data.each do |iv, value|
-        assert_equal value, result[iv]
-      end
-    end
-
-    context "converting to JSON" do
-      should "convert instance variable hash to json" do
-        @json = mock("json")
-        @iv_hash = mock("iv_hash")
-        @iv_hash.expects(:to_json).once.returns(@json)
-        @base.expects(:instance_variables_hash).returns(@iv_hash)
-        assert_equal @json, @base.to_json
-      end
-
-      should "not include env in the JSON hash" do
-        @base.env = "FOO"
-        hash = @base.instance_variables_hash
-        assert !hash.has_key?(:env)
-      end
-    end
-  end
-
   context "top config class" do
     setup do
       @configures_list = []
@@ -220,90 +166,4 @@ class ConfigTest < Test::Unit::TestCase
       end
     end
   end
-
-  context "vagrant configuration" do
-    setup do
-      @config = Vagrant::Config::VagrantConfig.new
-    end
-
-    should "return nil if home is nil" do
-      File.expects(:expand_path).never
-      assert @config.home.nil?
-    end
-
-    should "expand the path if home is not nil" do
-      @config.home = "foo"
-      File.expects(:expand_path).with("foo").once.returns("result")
-      assert_equal "result", @config.home
-    end
-  end
-
-  context "VM configuration" do
-    setup do
-      @username = "mitchellh"
-
-      @env = mock_environment
-      @config = @env.config.vm
-      @env.config.ssh.username = @username
-    end
-
-    context "defining VMs" do
-      should "store the proc by name but not run it" do
-        foo = mock("proc")
-        foo.expects(:call).never
-
-        proc = Proc.new { foo.call }
-        @config.define(:name, &proc)
-        assert @config.defined_vms[:name].proc_stack.include?(proc)
-      end
-
-      should "store the options" do
-        @config.define(:name, :set => true)
-        assert @config.defined_vms[:name].options[:set]
-      end
-
-      should "not have multi-VMs by default" do
-        assert !@config.has_multi_vms?
-      end
-
-      should "have multi-VMs once one is specified" do
-        @config.define(:foo) {}
-        assert @config.has_multi_vms?
-      end
-    end
-
-    context "customizing" do
-      should "include the stacked proc runner module" do
-        assert @config.class.included_modules.include?(Vagrant::Util::StackedProcRunner)
-      end
-
-      should "add the customize proc to the proc stack" do
-        proc = Proc.new {}
-        @config.customize(&proc)
-        assert_equal [proc], @config.proc_stack
-      end
-    end
-
-    context "uid/gid" do
-      should "return the shared folder UID if set" do
-        @config.shared_folder_uid = "foo"
-        assert_equal "foo", @config.shared_folder_uid
-      end
-
-      should "return the SSH username if UID not set" do
-        @config.shared_folder_uid = nil
-        assert_equal @username, @config.shared_folder_uid
-      end
-
-      should "return the shared folder GID if set" do
-        @config.shared_folder_gid = "foo"
-        assert_equal "foo", @config.shared_folder_gid
-      end
-
-      should "return the SSH username if GID not set" do
-        @config.shared_folder_gid = nil
-        assert_equal @username, @config.shared_folder_gid
-      end
-    end
-  end
 end