diff --git a/lib/vagrant/action/vm/forward_ports.rb b/lib/vagrant/action/vm/forward_ports.rb
index 27dc8246e..7959118d0 100644
--- a/lib/vagrant/action/vm/forward_ports.rb
+++ b/lib/vagrant/action/vm/forward_ports.rb
@@ -11,7 +11,7 @@ module Vagrant
           @env = env
 
           threshold_check
-          external_collision_check if !env.error?
+          external_collision_check
         end
 
         #--------------------------------------------------------------
@@ -23,7 +23,7 @@ module Vagrant
         # 1024, which causes the forwarded ports to fail.
         def threshold_check
           @env.env.config.vm.forwarded_ports.each do |name, options|
-            return @env.error!(:vm_port_below_threshold) if options[:hostport] <= 1024
+            raise Errors::ForwardPortBelowThreshold.new if options[:hostport] <= 1024
           end
         end
 
@@ -47,7 +47,9 @@ module Vagrant
           if !options[:auto]
             # Auto fixing is disabled for this port forward, so we
             # must throw an error so the user can fix it.
-            return @env.error!(:vm_port_collision, :name => name, :hostport => options[:hostport].to_s, :guestport => options[:guestport].to_s, :adapter => options[:adapter])
+            raise Errors::ForwardPortCollision.new(:name => name,
+                                                   :host_port => options[:hostport].to_s,
+                                                   :guest_port => options[:guestport].to_s)
           end
 
           # Get the auto port range and get rid of the used ports and
@@ -58,7 +60,10 @@ module Vagrant
           range -= existing_ports
 
           if range.empty?
-            return @env.error!(:vm_port_auto_empty, :vm_name => @env["vm"].name, :name => name, :options => options)
+            raise Errors::ForwardPortAutolistEmpty.new(:vm_name => @env["vm"].name,
+                                                       :name => name,
+                                                       :host_port => options[:hostport].to_s,
+                                                       :guest_port => options[:guestport].to_s)
           end
 
           # Set the port up to be the first one and add that port to
diff --git a/lib/vagrant/action/vm/import.rb b/lib/vagrant/action/vm/import.rb
index 98172c5a7..8c936a67f 100644
--- a/lib/vagrant/action/vm/import.rb
+++ b/lib/vagrant/action/vm/import.rb
@@ -15,7 +15,7 @@ module Vagrant
           end
 
           # Flag as erroneous and return if import failed
-          return env.error!(:virtualbox_import_failure) if !env['vm'].vm
+          raise Errors::VMImportFailure.new if !env["vm"].vm
 
           # Import completed successfully. Continue the chain
           @app.call(env)
diff --git a/lib/vagrant/action/vm/network.rb b/lib/vagrant/action/vm/network.rb
index 3187cdd96..07e395eaa 100644
--- a/lib/vagrant/action/vm/network.rb
+++ b/lib/vagrant/action/vm/network.rb
@@ -11,10 +11,7 @@ module Vagrant
           @env = env
 
           env["config"].vm.network_options.compact.each do |network_options|
-            if !verify_no_bridge_collision(network_options)
-              env.error!(:network_collides)
-              return
-            end
+            raise Errors::NetworkCollision.new if !verify_no_bridge_collision(network_options)
           end
         end
 
@@ -24,7 +21,7 @@ module Vagrant
 
           @app.call(env)
 
-          if !env.error? && enable_network?
+          if enable_network?
             catch_action_exception(env) do
               @env.ui.info "vagrant.actions.vm.network.enabling"
               @env["vm"].system.prepare_host_only_network
@@ -90,7 +87,7 @@ module Vagrant
             end
           end
 
-          return @env.error!(:network_not_found, :name => net_options[:name]) if net_options[:name]
+          raise Errors::NetworkNotFound.new(:name => net_options[:name]) if net_options[:name]
 
           # One doesn't exist, create it.
           @env.ui.info "vagrant.actions.vm.network.creating"
diff --git a/lib/vagrant/action/vm/nfs.rb b/lib/vagrant/action/vm/nfs.rb
index 4bb9f4d63..3ebd1442b 100644
--- a/lib/vagrant/action/vm/nfs.rb
+++ b/lib/vagrant/action/vm/nfs.rb
@@ -37,11 +37,11 @@ module Vagrant
             export_folders
           end
 
-          return if env.error?
-
           @app.call(env)
 
-          mount_folders if !folders.empty? && !env.error?
+          mount_folders if !folders.empty?
+
+          # TODO: Make recover method
           clear_nfs_exports(env) if env.error?
         end
 
@@ -151,9 +151,9 @@ module Vagrant
 
         # Verifies that the host is set and supports NFS.
         def verify_settings
-          return @env.error!(:nfs_host_required) if @env["host"].nil?
-          return @env.error!(:nfs_not_supported) if !@env["host"].nfs?
-          return @env.error!(:nfs_no_host_network) if @env["config"].vm.network_options.empty?
+          raise Errors::NFSHostRequired.new if @env["host"].nil?
+          raise Errors::NFSNotSupported.new if !@env["host"].nfs?
+          raise Errors::NFSNoHostNetwork.new if @env["config"].vm.network_options.empty?
         end
       end
     end
diff --git a/lib/vagrant/errors.rb b/lib/vagrant/errors.rb
index fbd297b98..6e176c1c1 100644
--- a/lib/vagrant/errors.rb
+++ b/lib/vagrant/errors.rb
@@ -79,6 +79,21 @@ module Vagrant
       error_key(:cli_missing_env)
     end
 
+    class ForwardPortAutolistEmpty < VagrantError
+      status_code(27)
+      error_key(:auto_empty, "vagrant.actions.vm.forward_ports")
+    end
+
+    class ForwardPortBelowThreshold < VagrantError
+      status_code(25)
+      error_key(:below_threshold_error, "vagrant.actions.vm.forward_ports")
+    end
+
+    class ForwardPortCollision < VagrantError
+      status_code(26)
+      error_key(:collision_error, "vagrant.actions.vm.forward_ports")
+    end
+
     class MultiVMEnvironmentRequired < VagrantError
       status_code(5)
       error_key(:multi_vm_required)
@@ -89,6 +104,31 @@ module Vagrant
       error_key(:multi_vm_target_required)
     end
 
+    class NetworkCollision < VagrantError
+      status_code(29)
+      error_key(:collides, "vagrant.actions.vm.network")
+    end
+
+    class NetworkNotFound < VagrantError
+      status_code(30)
+      error_key(:not_found, "vagrant.actions.vm.network")
+    end
+
+    class NFSHostRequired < VagrantError
+      status_code(31)
+      error_key(:host_required, "vagrant.actions.vm.nfs")
+    end
+
+    class NFSNotSupported < VagrantError
+      status_code(32)
+      error_key(:not_supported, "vagrant.actions.vm.nfs")
+    end
+
+    class NFSNoHostNetwork < VagrantError
+      status_code(33)
+      error_key(:no_host_network, "vagrant.actions.vm.nfs")
+    end
+
     class NoEnvironmentError < VagrantError
       status_code(3)
       error_key(:no_env)
@@ -144,6 +184,11 @@ module Vagrant
       error_key(:failed_to_boot, "vagrant.actions.vm.boot")
     end
 
+    class VMImportFailure < VagrantError
+      status_code(28)
+      error_key(:failure, "vagrant.actions.vm.import")
+    end
+
     class VMNotCreatedError < VagrantError
       status_code(6)
       error_key(:vm_creation_required)
diff --git a/templates/locales/en.yml b/templates/locales/en.yml
index da0b3427f..405ed595d 100644
--- a/templates/locales/en.yml
+++ b/templates/locales/en.yml
@@ -149,6 +149,29 @@ en:
           exporting: Exporting VM...
           power_off: "The Vagrant virtual environment you are trying to package must be powered off."
         forward_ports:
+          auto_empty: |-
+            Vagrant found a port collision for the specified port and virtual machine.
+            While this port was marked to be auto-corrected, the ports in the
+            auto-correction range are all also used.
+
+            VM: %{vm_name}
+            Forwarded port: %{name} (%{guest_port} => %{host_port})
+          below_threshold_error: |-
+            The host port of all forwarded ports must be above 1024. VirtualBox
+            does not allow host ports to be below 1024. (Guest ports below 1024
+            are fine. For example: SSH on port 22 on the guest can be forwarded
+            to port 2222, but not 222).
+          collision_error: |-
+            Vagrant cannot forward the specified ports on this VM, since they
+            would collide with another VirtualBox virtual machine's forwarded
+            ports! The '%{name}' forwarded port (%{host_port}) is already in use on the host
+            machine.
+
+            To fix this, modify your current projects Vagrantfile to use another
+            port. Example, where '1234' would be replaced by a unique host port:
+
+              config.vm.forward_port("%{name}", %{guest_port}, 1234)
+
           fixed_collision: Fixed port collision '%{name}'. Now on port %{new_port}.
           forwarding: Forwarding ports...
           forwarding_entry: "-- %{name}: %{guest_port} => %{host_port} (adapter %{adapter})"
@@ -159,13 +182,37 @@ en:
           force: Forcing shutdown of VM...
         import:
           importing: Importing base box '%{name}'...
+          failure: |-
+            The VM import failed! Try running `VBoxManage import` on the box file
+            manually for more verbose error output.
         match_mac:
           matching: Matching MAC address for NAT networking...
         network:
-          enabling: Enabling host only network...
-          preparing: Preparing host only network...
+          collides: |-
+            The specified host network collides with a non-hostonly network!
+            This will cause your specified IP to be inaccessible. Please change
+            the IP or name of your host only network to not match that of
+            a bridged or non-hostonly network.
           creating: Creating new host only network for environment...
+          enabling: Enabling host only network...
+          not_found: |-
+            The specified host network could not be found: '%{name}.'
+            If the name specification is removed, Vagrant will create a new
+            host only network for you. Alternatively, please create the
+            specified network manually.
+          preparing: Preparing host only network...
         nfs:
+          host_required: |-
+            A host class is required for NFS shared folders. By default, these
+            are auto-detected, but can be overriden with `config.vagrant.host`.
+            There is currently not host class loaded.
+          no_host_network: |-
+            NFS shared folders requires that host only networking is enabled.
+            Please enable host only networking via `config.vm.network`.
+          not_supported: |-
+            The host class is reporting that NFS is not supported by this host,
+            or `nfsd` may not be installed. Please verify that `nfsd` is installed
+            on your machine, and retry.
           exporting: Exporting NFS shared folders...
           mounting: Mounting NFS shared folders...
         persist:
diff --git a/templates/strings.yml b/templates/strings.yml
index 93d471298..2574dadaf 100644
--- a/templates/strings.yml
+++ b/templates/strings.yml
@@ -68,27 +68,6 @@
   The given box does not exist on the file system:
 
   <%= source_url %>
-:nfs_host_required: |-
-  A host class is required for NFS shared folders. By default, these
-  are auto-detected, but can be overriden with `config.vagrant.host`.
-  There is currently not host class loaded.
-:nfs_not_supported: |-
-  The host class is reporting that NFS is not supported by this host,
-  or `nfsd` may not be installed. Please verify that `nfsd` is installed
-  on your machine, and retry.
-:nfs_no_host_network: |-
-  NFS shared folders requires that host only networking is enabled.
-  Please enable host only networking via `config.vm.network`.
-:network_not_found: |-
-  The specified host network could not be found: <%= name %>.
-  If the name specification is removed, Vagrant will create a new
-  host only network for you. Alternatively, please create the
-  specified network manually.
-:network_collides: |-
-  The specified host network collides with a non-hostonly network!
-  This will cause your specified IP to be inaccessible. Please change
-  the IP or name of your host only network to not match that of
-  a bridged or non-hostonly network.
 :package_requires_export: |-
   Package must be used in conjunction with export.
 :provisioner_invalid_class: |-
@@ -111,31 +90,6 @@
 :system_unspecified: |-
   A VM system type must be specified! This is done via the `config.vm.system`
   configuration value. Please read the documentation online for more information.
-:virtualbox_import_failure: |-
-  The VM import failed! Try running `VBoxManage import` on the box file
-  manually for more verbose error output.
-:vm_port_auto_empty: |-
-  Vagrant found a port collision for the specified port and virtual machine.
-  While this port was marked to be auto-corrected, the ports in the
-  auto-correction range are all also used.
-
-  VM: <%= vm_name %>
-  Forwarded port: <%= name %> (<%= options[:guestport] %> => <%= options[:hostport] %>)
-:vm_port_below_threshold: |-
-  The host port of all forwarded ports must be above 1024. VirtualBox
-  does not allow host ports to be below 1024. (Guest ports below 1024
-  are fine. For example: SSH on port 22 on the guest can be forwarded
-  to port 2222, but not 222).
-:vm_port_collision: |-
-  Vagrant cannot forward the specified ports on this VM, since they
-  would collide with another VirtualBox virtual machine's forwarded
-  ports! The "<%= name %>" forwarded port (<%= hostport %>) is already in use on the host
-  machine.
-
-  To fix this, modify your current projects Vagrantfile to use another
-  port. Example, where '1234' would be replaced by a unique host port:
-
-  config.vm.forward_port("<%= name %>", <%= guestport %>, 1234)
 :vm_mount_fail: |-
   Failed to mount shared folders. vboxsf was not available.
 #---------------------------------------------------------------------
diff --git a/test/vagrant/action/vm/forward_ports_test.rb b/test/vagrant/action/vm/forward_ports_test.rb
index 481a20e8c..2d74238fa 100644
--- a/test/vagrant/action/vm/forward_ports_test.rb
+++ b/test/vagrant/action/vm/forward_ports_test.rb
@@ -26,9 +26,10 @@ class ForwardPortsVMActionTest < Test::Unit::TestCase
     should "error if has a port below threshold" do
       @env.env.config.vm.forwarded_ports.clear
       @env.env.config.vm.forward_port("foo", 22, 222)
-      @klass.new(@app, @env)
-      assert @env.error?
-      assert_equal :vm_port_below_threshold, @env.error.first
+
+      assert_raises(Vagrant::Errors::ForwardPortBelowThreshold) {
+        @klass.new(@app, @env)
+      }
     end
 
     should "not error if ports are fine" do
@@ -84,9 +85,10 @@ class ForwardPortsVMActionTest < Test::Unit::TestCase
 
       should "error if auto forwarding is disabled" do
         @options[:auto] = false
-        @instance.handle_collision(@name, @options, @used_ports)
-        assert @env.error?
-        assert_equal :vm_port_collision, @env.error.first
+
+        assert_raises(Vagrant::Errors::ForwardPortCollision) {
+          @instance.handle_collision(@name, @options, @used_ports)
+        }
       end
 
       should "set the host port to the first available port" do
@@ -111,9 +113,10 @@ class ForwardPortsVMActionTest < Test::Unit::TestCase
 
       should "raise an exception if there are no auto ports available" do
         @env.env.config.vm.auto_port_range = (1..3)
-        @instance.handle_collision(@name, @options, @used_ports)
-        assert @env.error?
-        assert_equal :vm_port_auto_empty, @env.error.first
+
+        assert_raises(Vagrant::Errors::ForwardPortAutolistEmpty) {
+          @instance.handle_collision(@name, @options, @used_ports)
+        }
       end
     end
 
diff --git a/test/vagrant/action/vm/import_test.rb b/test/vagrant/action/vm/import_test.rb
index 0388aef22..a9bebe581 100644
--- a/test/vagrant/action/vm/import_test.rb
+++ b/test/vagrant/action/vm/import_test.rb
@@ -33,9 +33,9 @@ class ImportVMActionTest < Test::Unit::TestCase
 
   should "mark environment erroneous and not continue chain on failure" do
     @app.expects(:call).never
-    @instance.call(@env)
-
-    assert @env.error?
+    assert_raises(Vagrant::Errors::VMImportFailure) {
+      @instance.call(@env)
+    }
   end
 
   should "run the destroy action on recover" do
diff --git a/test/vagrant/action/vm/network_test.rb b/test/vagrant/action/vm/network_test.rb
index 038e837e4..bce96d70e 100644
--- a/test/vagrant/action/vm/network_test.rb
+++ b/test/vagrant/action/vm/network_test.rb
@@ -18,7 +18,7 @@ class NetworkVMActionTest < Test::Unit::TestCase
   context "initializing" do
     should "verify no bridge collisions for each network enabled" do
       @env.env.config.vm.network("foo")
-      @klass.any_instance.expects(:verify_no_bridge_collision).once.with() do |options|
+      @klass.any_instance.expects(:verify_no_bridge_collision).returns(true).once.with() do |options|
         assert_equal "foo", options[:ip]
         true
       end
@@ -139,8 +139,9 @@ class NetworkVMActionTest < Test::Unit::TestCase
         mock_interface(:name => @options[:name],
                        :interface_type => :bridged)
 
-        @instance.network_name(@options)
-        assert @env.error?
+        assert_raises(Vagrant::Errors::NetworkNotFound) {
+          @instance.network_name(@options)
+        }
       end
 
       should "return the network which matches the name if given" do
@@ -154,9 +155,9 @@ class NetworkVMActionTest < Test::Unit::TestCase
         @options[:name] = "foo"
 
         @interfaces.expects(:create).never
-        @instance.network_name(@options)
-        assert @env.error?
-        assert_equal :network_not_found, @env.error.first
+        assert_raises(Vagrant::Errors::NetworkNotFound) {
+          @instance.network_name(@options)
+        }
       end
 
       should "create a network for the IP and netmask" do
diff --git a/test/vagrant/action/vm/nfs_test.rb b/test/vagrant/action/vm/nfs_test.rb
index aa24040a7..bad1e4502 100644
--- a/test/vagrant/action/vm/nfs_test.rb
+++ b/test/vagrant/action/vm/nfs_test.rb
@@ -66,18 +66,6 @@ class NFSVMActionTest < Test::Unit::TestCase
         @instance.call(@env)
       end
 
-      should "halt chain if environment error occured" do
-        @env.error!(:foo)
-
-        seq = sequence('seq')
-        @instance.expects(:extract_folders).in_sequence(seq)
-        @instance.expects(:prepare_folders).in_sequence(seq)
-        @instance.expects(:clear_nfs_exports).in_sequence(seq)
-        @instance.expects(:export_folders).in_sequence(seq)
-        @app.expects(:call).never
-        @instance.call(@env)
-      end
-
       should "not mount folders if an error occured" do
         seq = sequence("seq")
         @app.expects(:call).in_sequence(seq).with() do
@@ -240,29 +228,30 @@ class NFSVMActionTest < Test::Unit::TestCase
 
       should "error environment if host is nil" do
         @env.env.stubs(:host).returns(nil)
-        @instance.verify_settings
-        assert @env.error?
-        assert_equal :nfs_host_required, @env.error.first
+        assert_raises(Vagrant::Errors::NFSHostRequired) {
+          @instance.verify_settings
+        }
       end
 
       should "error environment if host does not support NFS" do
         @env.env.host.stubs(:nfs?).returns(false)
-        @instance.verify_settings
-        assert @env.error?
-        assert_equal :nfs_not_supported, @env.error.first
+        assert_raises(Vagrant::Errors::NFSNotSupported) {
+          @instance.verify_settings
+        }
       end
 
       should "error environment if host only networking is not enabled" do
         @env.env.config.vm.network_options.clear
-        @instance.verify_settings
-        assert @env.error?
-        assert_equal :nfs_no_host_network, @env.error.first
+        assert_raises(Vagrant::Errors::NFSNoHostNetwork) {
+          @instance.verify_settings
+        }
       end
 
       should "be fine if everything passes" do
         @env.env.host.stubs(:nfs?).returns(true)
-        @instance.verify_settings
-        assert !@env.error?
+        assert_nothing_raised {
+          @instance.verify_settings
+        }
       end
     end
   end