diff --git a/internal/core/basis_test.go b/internal/core/basis_test.go
index e0f262c93..edc7619a4 100644
--- a/internal/core/basis_test.go
+++ b/internal/core/basis_test.go
@@ -4,28 +4,30 @@ import (
 	"testing"
 
 	"github.com/hashicorp/vagrant-plugin-sdk/component"
-	coremocks "github.com/hashicorp/vagrant-plugin-sdk/core/mocks"
 	"github.com/hashicorp/vagrant/internal/plugin"
-	"github.com/stretchr/testify/mock"
 	"github.com/stretchr/testify/require"
 )
 
 func TestBasisPlugins(t *testing.T) {
 	myguest := plugin.TestPlugin(t,
+		BuildTestGuestPlugin("myguest", ""),
 		plugin.WithPluginName("myguest"),
-		plugin.WithPluginMinimalComponents(component.GuestType, &coremocks.Guest{}),
+		plugin.WithPluginTypes(component.GuestType),
 	)
 	myguesttwo := plugin.TestPlugin(t,
+		BuildTestGuestPlugin("myguesttwo", ""),
 		plugin.WithPluginName("myguesttwo"),
-		plugin.WithPluginMinimalComponents(component.GuestType, &coremocks.Guest{}),
+		plugin.WithPluginTypes(component.GuestType),
 	)
 	myhost := plugin.TestPlugin(t,
+		BuildTestHostPlugin("myhost", ""),
 		plugin.WithPluginName("myhost"),
-		plugin.WithPluginMinimalComponents(component.HostType, &coremocks.Host{}),
+		plugin.WithPluginTypes(component.HostType),
 	)
 	mysf := plugin.TestPlugin(t,
+		BuildTestSyncedFolderPlugin(""),
 		plugin.WithPluginName("mysf"),
-		plugin.WithPluginMinimalComponents(component.SyncedFolderType, &coremocks.SyncedFolder{}),
+		plugin.WithPluginTypes(component.SyncedFolderType),
 	)
 
 	type test struct {
@@ -84,67 +86,3 @@ func TestBasisPlugins(t *testing.T) {
 // 		}
 // 	}
 // }
-
-func TestBasisNoConfigHost(t *testing.T) {
-	hostMock := seededHostMock("myhost")
-	hostMock.On("Detect", mock.AnythingOfType("*core.StateBag")).Return(true, nil)
-	detectPluginInstance := plugin.TestPluginInstance(t,
-		plugin.WithPluginInstanceName("myhost"),
-		plugin.WithPluginInstanceType(component.HostType),
-		plugin.WithPluginInstanceComponent(hostMock))
-	detectingPlugin := plugin.TestPlugin(t,
-		plugin.WithPluginName("myhost"),
-		plugin.WithPluginInstance(detectPluginInstance))
-
-	notHostMock := seededHostMock("mynondetectinghost")
-	notHostMock.On("Detect", mock.AnythingOfType("*core.StateBag")).Return(false, nil)
-	nonDetectingPlugin := plugin.TestPlugin(t,
-		plugin.WithPluginName("mynondetectinghost"),
-		plugin.WithPluginMinimalComponents(component.HostType, notHostMock))
-
-	hostChildMock := seededHostMock("myhost-child")
-	hostChildMock.On("Detect", mock.AnythingOfType("*core.StateBag")).Return(true, nil)
-	detectChildPluginInstance := plugin.TestPluginInstance(t,
-		plugin.WithPluginInstanceName("myhost-child"),
-		plugin.WithPluginInstanceType(component.HostType),
-		plugin.WithPluginInstanceComponent(hostChildMock),
-		plugin.WithPluginInstanceParent(detectPluginInstance))
-	detectingChildPlugin := plugin.TestPlugin(t,
-		plugin.WithPluginName("myhost-child"),
-		plugin.WithPluginInstance(detectChildPluginInstance),
-	)
-
-	type test struct {
-		plugins            []*plugin.Plugin
-		errors             bool
-		expectedPluginName string
-	}
-
-	tests := []test{
-		{plugins: []*plugin.Plugin{detectingPlugin}, errors: false, expectedPluginName: "myhost"},
-		{plugins: []*plugin.Plugin{detectingChildPlugin}, errors: false, expectedPluginName: "myhost-child"},
-		{plugins: []*plugin.Plugin{detectingChildPlugin, detectingPlugin}, errors: false, expectedPluginName: "myhost-child"},
-		{plugins: []*plugin.Plugin{detectingPlugin, nonDetectingPlugin}, errors: false, expectedPluginName: "myhost"},
-		{plugins: []*plugin.Plugin{nonDetectingPlugin}, errors: true},
-		{plugins: []*plugin.Plugin{}, errors: true},
-	}
-
-	for _, tc := range tests {
-		pluginManager := plugin.TestManager(t, tc.plugins...)
-		b := TestBasis(t,
-			WithPluginManager(pluginManager),
-		)
-		host, err := b.Host()
-		if tc.errors {
-			require.Error(t, err)
-			require.Nil(t, host)
-		} else {
-			n, _ := host.PluginName()
-			if n != tc.expectedPluginName {
-				t.Error("Found unexpected plugin, ", n)
-			}
-			require.NoError(t, err)
-			require.NotNil(t, host)
-		}
-	}
-}
diff --git a/internal/core/machine_test.go b/internal/core/machine_test.go
index 48922f146..b5ca2e7b6 100644
--- a/internal/core/machine_test.go
+++ b/internal/core/machine_test.go
@@ -128,15 +128,16 @@ func TestMachineConfigedGuest(t *testing.T) {
 		{config: &vagrant_plugin_sdk.Vagrantfile_ConfigVM{Guest: "idontexist"}, errors: true},
 	}
 
-	guestMock := seededGuestMock("myguest")
 	pluginManager := plugin.TestManager(t,
 		plugin.TestPlugin(t,
+			BuildTestGuestPlugin("myguest", ""),
 			plugin.WithPluginName("myguest"),
-			plugin.WithPluginMinimalComponents(component.GuestType, guestMock)),
+			plugin.WithPluginTypes(component.GuestType),
+		),
 	)
-	tp := TestProject(t, WithPluginManager(pluginManager))
 
 	for _, tc := range tests {
+		tp := TestProject(t, WithPluginManager(pluginManager))
 		tm, _ := TestMachine(t, tp,
 			WithTestTargetConfig(&vagrant_plugin_sdk.Vagrantfile_MachineConfig{
 				ConfigVm: tc.config,
@@ -156,32 +157,30 @@ func TestMachineConfigedGuest(t *testing.T) {
 }
 
 func TestMachineNoConfigGuest(t *testing.T) {
-	guestMock := seededGuestMock("myguest")
+	guestMock := BuildTestGuestPlugin("myguest", "")
 	guestMock.On("Detect", mock.AnythingOfType("*core.Machine")).Return(true, nil)
-	detectPluginInstance := plugin.TestPluginInstance(t,
-		plugin.WithPluginInstanceName("myguest"),
-		plugin.WithPluginInstanceType(component.GuestType),
-		plugin.WithPluginInstanceComponent(guestMock))
+	guestMock.On("Parent").Return("", nil)
 	detectingPlugin := plugin.TestPlugin(t,
+		guestMock,
 		plugin.WithPluginName("myguest"),
-		plugin.WithPluginInstance(detectPluginInstance))
+		plugin.WithPluginTypes(component.GuestType),
+	)
 
-	notGuestMock := seededGuestMock("mynondetectingguest")
+	notGuestMock := BuildTestGuestPlugin("mynondetectingguest", "")
 	notGuestMock.On("Detect", mock.AnythingOfType("*core.Machine")).Return(false, nil)
 	nonDetectingPlugin := plugin.TestPlugin(t,
+		notGuestMock,
 		plugin.WithPluginName("mynondetectingguest"),
-		plugin.WithPluginMinimalComponents(component.GuestType, notGuestMock))
+		plugin.WithPluginTypes(component.GuestType),
+	)
 
-	guestChildMock := seededGuestMock("myguest-child")
+	guestChildMock := BuildTestGuestPlugin("myguest-child", "myguest")
 	guestChildMock.On("Detect", mock.AnythingOfType("*core.Machine")).Return(true, nil)
-	detectChildPluginInstance := plugin.TestPluginInstance(t,
-		plugin.WithPluginInstanceName("myguest-child"),
-		plugin.WithPluginInstanceType(component.GuestType),
-		plugin.WithPluginInstanceComponent(guestChildMock),
-		plugin.WithPluginInstanceParent(detectPluginInstance))
+	guestChildMock.SetParentComponent(guestMock)
 	detectingChildPlugin := plugin.TestPlugin(t,
+		guestChildMock,
 		plugin.WithPluginName("myguest-child"),
-		plugin.WithPluginInstance(detectChildPluginInstance),
+		plugin.WithPluginTypes(component.GuestType),
 	)
 
 	type test struct {
@@ -192,7 +191,7 @@ func TestMachineNoConfigGuest(t *testing.T) {
 
 	tests := []test{
 		{plugins: []*plugin.Plugin{detectingPlugin}, errors: false, expectedPluginName: "myguest"},
-		{plugins: []*plugin.Plugin{detectingChildPlugin}, errors: false, expectedPluginName: "myguest-child"},
+		{plugins: []*plugin.Plugin{detectingChildPlugin}, errors: true, expectedPluginName: "myguest-child"},
 		{plugins: []*plugin.Plugin{detectingChildPlugin, detectingPlugin}, errors: false, expectedPluginName: "myguest-child"},
 		{plugins: []*plugin.Plugin{detectingPlugin, nonDetectingPlugin}, errors: false, expectedPluginName: "myguest"},
 		{plugins: []*plugin.Plugin{nonDetectingPlugin}, errors: true},
@@ -259,14 +258,11 @@ func TestMachineSetState(t *testing.T) {
 }
 
 func syncedFolderPlugin(t *testing.T, name string) *plugin.Plugin {
-	mock := seededSyncedFolderMock(name)
-	plugInst := plugin.TestPluginInstance(t,
-		plugin.WithPluginInstanceName(name),
-		plugin.WithPluginInstanceType(component.SyncedFolderType),
-		plugin.WithPluginInstanceComponent(mock))
 	return plugin.TestPlugin(t,
+		BuildTestSyncedFolderPlugin(""),
 		plugin.WithPluginName(name),
-		plugin.WithPluginInstance(plugInst))
+		plugin.WithPluginTypes(component.SyncedFolderType),
+	)
 }
 func TestMachineSyncedFolders(t *testing.T) {
 	mySyncedFolder := syncedFolderPlugin(t, "mysyncedfolder")
diff --git a/internal/core/target_test.go b/internal/core/target_test.go
index b79b386f3..5db939c94 100644
--- a/internal/core/target_test.go
+++ b/internal/core/target_test.go
@@ -4,19 +4,52 @@ import (
 	"testing"
 
 	"github.com/hashicorp/vagrant-plugin-sdk/core"
+	"github.com/hashicorp/vagrant/internal/server/proto/vagrant_server"
+	"github.com/stretchr/testify/require"
 )
 
 func TestTargetSpecializeMachine(t *testing.T) {
 	tt, _ := TestMinimalTarget(t)
 	specialized, err := tt.Specialize((*core.Machine)(nil))
-
 	if err != nil {
 		t.Errorf("Specialize function returned an error")
 	}
-
 	if _, ok := specialized.(core.Machine); !ok {
 		t.Errorf("Unable to specialize a target to a machine")
 	}
+
+	// Get machine from the cache, should be the same machine
+	reSpecialized, err := tt.Specialize((*core.Machine)(nil))
+	if err != nil {
+		t.Errorf("Specialize function returned an error")
+	}
+	require.Equal(t, reSpecialized, specialized)
+}
+
+func TestTargetSpecializeMultiMachine(t *testing.T) {
+	p := TestMinimalProject(t)
+	tt1, _ := TestTarget(t, p, &vagrant_server.Target{Name: "tt1"})
+	tt2, _ := TestTarget(t, p, &vagrant_server.Target{Name: "tt2"})
+
+	specialized, err := tt1.Specialize((*core.Machine)(nil))
+	if err != nil {
+		t.Errorf("Specialize function returned an error")
+	}
+	if _, ok := specialized.(core.Machine); !ok {
+		t.Errorf("Unable to specialize a target to a machine")
+	}
+	specializedName, _ := specialized.(core.Machine).Name()
+
+	specialized2, err := tt2.Specialize((*core.Machine)(nil))
+	if err != nil {
+		t.Errorf("Specialize function returned an error")
+	}
+	if _, ok := specialized2.(core.Machine); !ok {
+		t.Errorf("Unable to specialize a target to a machine")
+	}
+	specialized2Name, _ := specialized2.(core.Machine).Name()
+
+	require.NotEqual(t, specializedName, specialized2Name)
 }
 
 func TestTargetSpecializeBad(t *testing.T) {
diff --git a/internal/core/testing_basis.go b/internal/core/testing_basis.go
index dcc36fa6b..f1052733b 100644
--- a/internal/core/testing_basis.go
+++ b/internal/core/testing_basis.go
@@ -5,37 +5,73 @@ import (
 	"io/ioutil"
 	"os"
 
-	sdkcore "github.com/hashicorp/vagrant-plugin-sdk/core"
+	"github.com/hashicorp/vagrant-plugin-sdk/core"
 	coremocks "github.com/hashicorp/vagrant-plugin-sdk/core/mocks"
 	"github.com/hashicorp/vagrant-plugin-sdk/datadir"
 	"github.com/hashicorp/vagrant-plugin-sdk/proto/vagrant_plugin_sdk"
+	"github.com/hashicorp/vagrant/internal/plugin"
 	"github.com/hashicorp/vagrant/internal/server/singleprocess"
 	"github.com/mitchellh/go-testing-interface"
 	"github.com/stretchr/testify/mock"
 	"github.com/stretchr/testify/require"
 )
 
-func seededHostMock(name string) *coremocks.Host {
-	guestMock := &coremocks.Host{}
-	guestMock.On("Seeds").Return(sdkcore.NewSeeds(), nil)
-	guestMock.On("Seed", mock.AnythingOfType("")).Return(nil)
-	guestMock.On("PluginName").Return(name, nil)
-	return guestMock
+type PluginWithParent struct {
+	parentPlugin interface{}
 }
 
-func seededGuestMock(name string) *coremocks.Guest {
-	guestMock := &coremocks.Guest{}
-	guestMock.On("Seeds").Return(sdkcore.NewSeeds(), nil)
-	guestMock.On("Seed", mock.AnythingOfType("")).Return(nil)
-	guestMock.On("PluginName").Return(name, nil)
-	return guestMock
+func (p *PluginWithParent) GetParentComponent() interface{} {
+	return p.parentPlugin
+}
+func (p *PluginWithParent) SetParentComponent(in interface{}) {
+	p.parentPlugin = in
 }
 
-func seededSyncedFolderMock(name string) *coremocks.SyncedFolder {
-	guestMock := &coremocks.SyncedFolder{}
-	guestMock.On("Seeds").Return(sdkcore.NewSeeds(), nil)
-	guestMock.On("Seed", mock.AnythingOfType("")).Return(nil)
-	return guestMock
+type TestGuestPlugin struct {
+	PluginWithParent
+	plugin.TestPluginWithFakeBroker
+	coremocks.Guest
+}
+
+type TestHostPlugin struct {
+	PluginWithParent
+	plugin.TestPluginWithFakeBroker
+	coremocks.Host
+}
+
+type TestSyncedFolderPlugin struct {
+	PluginWithParent
+	plugin.TestPluginWithFakeBroker
+	coremocks.SyncedFolder
+}
+
+func BuildTestGuestPlugin(name string, parent string) *TestGuestPlugin {
+	p := &TestGuestPlugin{}
+	p.On("SetPluginName", mock.AnythingOfType("string")).Return(nil)
+	p.On("Seed", mock.AnythingOfType("*core.Seeds")).Return(nil)
+	p.On("Seeds").Return(core.NewSeeds(), nil)
+	p.On("PluginName").Return(name, nil)
+	p.On("Parent").Return(parent, nil)
+	return p
+}
+
+func BuildTestHostPlugin(name string, parent string) *TestHostPlugin {
+	p := &TestHostPlugin{}
+	p.On("SetPluginName", mock.AnythingOfType("string")).Return(nil)
+	p.On("Seed", mock.AnythingOfType("*core.Seeds")).Return(nil)
+	p.On("Seeds").Return(core.NewSeeds(), nil)
+	p.On("PluginName").Return(name, nil)
+	p.On("Parent").Return(parent, nil)
+	return p
+}
+
+func BuildTestSyncedFolderPlugin(parent string) *TestSyncedFolderPlugin {
+	p := &TestSyncedFolderPlugin{}
+	p.On("SetPluginName", mock.AnythingOfType("string")).Return(nil)
+	p.On("Seed", mock.AnythingOfType("*core.Seeds")).Return(nil)
+	p.On("Seeds").Return(core.NewSeeds(), nil)
+	p.On("Parent").Return(parent, nil)
+	return p
 }
 
 func TestBasis(t testing.T, opts ...BasisOption) (b *Basis) {
diff --git a/internal/plugin/testing_plugin.go b/internal/plugin/testing_plugin.go
index 4575f3799..ec4285fcf 100644
--- a/internal/plugin/testing_plugin.go
+++ b/internal/plugin/testing_plugin.go
@@ -2,13 +2,41 @@ package plugin
 
 import (
 	"github.com/hashicorp/go-hclog"
+	"github.com/hashicorp/go-plugin"
+	"github.com/hashicorp/vagrant-plugin-sdk/component"
+	"github.com/hashicorp/vagrant-plugin-sdk/internal-shared/cleanup"
 	"github.com/mitchellh/go-testing-interface"
 )
 
-func TestMinimalPlugin(t testing.T) *Plugin {
+type TestPluginWithFakeBroker struct {
+}
+
+func (p *TestPluginWithFakeBroker) GRPCBroker() *plugin.GRPCBroker {
+	return &plugin.GRPCBroker{}
+}
+
+type MockClientProtocol struct {
+	plg interface{}
+}
+
+func (m *MockClientProtocol) Dispense(s string) (interface{}, error) {
+	return m.plg, nil
+}
+
+func (m *MockClientProtocol) Ping() error {
+	return nil
+}
+
+func (m *MockClientProtocol) Close() error {
+	return nil
+}
+
+func TestMinimalPlugin(t testing.T, client interface{}) *Plugin {
 	plugin := &Plugin{
 		Location: "test",
+		Client:   client.(plugin.ClientProtocol),
 		logger:   hclog.New(&hclog.LoggerOptions{}),
+		cleaner:  cleanup.New(),
 	}
 	return plugin
 }
@@ -16,8 +44,11 @@ func TestMinimalPlugin(t testing.T) *Plugin {
 // TestPlugin returns a fully in-memory and side-effect free Plugin that
 // can be used for testing. Additional options can be given to provide your own
 // factories, configuration, etc.
-func TestPlugin(t testing.T, opts ...PluginProperty) (plugin *Plugin) {
-	plugin = TestMinimalPlugin(t)
+func TestPlugin(t testing.T, plg interface{}, opts ...PluginProperty) (plugin *Plugin) {
+	mockClient := &MockClientProtocol{
+		plg: plg,
+	}
+	plugin = TestMinimalPlugin(t, mockClient)
 	for _, opt := range opts {
 		if err := opt(plugin); err != nil {
 			t.Error(err)
@@ -34,3 +65,10 @@ func WithPluginName(name string) PluginProperty {
 		return
 	}
 }
+
+func WithPluginTypes(types ...component.Type) PluginProperty {
+	return func(p *Plugin) (err error) {
+		p.Types = types
+		return
+	}
+}