diff --git a/common/commonspace/diffservice/diffservice.go b/common/commonspace/diffservice/diffservice.go
index 113e4e5c..ae3b5cb4 100644
--- a/common/commonspace/diffservice/diffservice.go
+++ b/common/commonspace/diffservice/diffservice.go
@@ -21,7 +21,7 @@ type DiffService interface {
 	RemoveObjects(ids []string)
 	AllIds() []string
 
-	Init(objectIds []string, deletionState *deletionstate.DeletionState)
+	Init(objectIds []string, deletionState deletionstate.DeletionState)
 	Close() (err error)
 }
 
@@ -61,7 +61,7 @@ func NewDiffService(
 	}
 }
 
-func (d *diffService) Init(objectIds []string, deletionState *deletionstate.DeletionState) {
+func (d *diffService) Init(objectIds []string, deletionState deletionstate.DeletionState) {
 	d.fillDiff(objectIds)
 	d.syncer.Init(deletionState)
 	d.periodicSync.Run()
diff --git a/common/commonspace/diffservice/diffsyncer.go b/common/commonspace/diffservice/diffsyncer.go
index 723cd50d..1618ee71 100644
--- a/common/commonspace/diffservice/diffsyncer.go
+++ b/common/commonspace/diffservice/diffsyncer.go
@@ -19,7 +19,7 @@ type DiffSyncer interface {
 	Sync(ctx context.Context) error
 	RemoveObjects(ids []string)
 	UpdateHeads(id string, heads []string)
-	Init(deletionState *deletionstate.DeletionState)
+	Init(deletionState deletionstate.DeletionState)
 }
 
 func newDiffSyncer(
@@ -49,10 +49,10 @@ type diffSyncer struct {
 	storage       storage.SpaceStorage
 	clientFactory spacesyncproto.ClientFactory
 	log           *zap.Logger
-	deletionState *deletionstate.DeletionState
+	deletionState deletionstate.DeletionState
 }
 
-func (d *diffSyncer) Init(deletionState *deletionstate.DeletionState) {
+func (d *diffSyncer) Init(deletionState deletionstate.DeletionState) {
 	d.deletionState = deletionState
 	d.deletionState.AddObserver(d.RemoveObjects)
 }
diff --git a/common/commonspace/settingsdocument/deleter.go b/common/commonspace/settingsdocument/deleter.go
index 51a8c32b..f1b5ca45 100644
--- a/common/commonspace/settingsdocument/deleter.go
+++ b/common/commonspace/settingsdocument/deleter.go
@@ -8,17 +8,21 @@ import (
 	"go.uber.org/zap"
 )
 
+type Deleter interface {
+	Delete()
+}
+
 type deleter struct {
 	st     storage.SpaceStorage
-	state  *deletionstate.DeletionState
+	state  deletionstate.DeletionState
 	getter treegetter.TreeGetter
 }
 
-func newDeleter(st storage.SpaceStorage, state *deletionstate.DeletionState, getter treegetter.TreeGetter) *deleter {
+func newDeleter(st storage.SpaceStorage, state deletionstate.DeletionState, getter treegetter.TreeGetter) Deleter {
 	return &deleter{st, state, getter}
 }
 
-func (d *deleter) delete() {
+func (d *deleter) Delete() {
 	allQueued := d.state.GetQueued()
 	for _, id := range allQueued {
 		err := d.getter.DeleteTree(context.Background(), d.st.Id(), id)
diff --git a/common/commonspace/settingsdocument/deletionstate/deletionstate.go b/common/commonspace/settingsdocument/deletionstate/deletionstate.go
index 8a38528c..fe56f0b2 100644
--- a/common/commonspace/settingsdocument/deletionstate/deletionstate.go
+++ b/common/commonspace/settingsdocument/deletionstate/deletionstate.go
@@ -7,7 +7,16 @@ import (
 
 type StateUpdateObserver func(ids []string)
 
-type DeletionState struct {
+type DeletionState interface {
+	AddObserver(observer StateUpdateObserver)
+	Add(ids []string) (err error)
+	GetQueued() (ids []string)
+	Delete(id string) (err error)
+	Exists(id string) bool
+	FilterJoin(ids ...[]string) (filtered []string)
+}
+
+type deletionState struct {
 	sync.RWMutex
 	queued               map[string]struct{}
 	deleted              map[string]struct{}
@@ -15,21 +24,21 @@ type DeletionState struct {
 	storage              storage.SpaceStorage
 }
 
-func NewDeletionState(storage storage.SpaceStorage) *DeletionState {
-	return &DeletionState{
+func NewDeletionState(storage storage.SpaceStorage) DeletionState {
+	return &deletionState{
 		queued:  map[string]struct{}{},
 		deleted: map[string]struct{}{},
 		storage: storage,
 	}
 }
 
-func (st *DeletionState) AddObserver(observer StateUpdateObserver) {
+func (st *deletionState) AddObserver(observer StateUpdateObserver) {
 	st.Lock()
 	defer st.Unlock()
 	st.stateUpdateObservers = append(st.stateUpdateObservers, observer)
 }
 
-func (st *DeletionState) Add(ids []string) (err error) {
+func (st *deletionState) Add(ids []string) (err error) {
 	st.Lock()
 	defer func() {
 		st.Unlock()
@@ -71,7 +80,7 @@ func (st *DeletionState) Add(ids []string) (err error) {
 	return
 }
 
-func (st *DeletionState) GetQueued() (ids []string) {
+func (st *deletionState) GetQueued() (ids []string) {
 	st.RLock()
 	defer st.RUnlock()
 	ids = make([]string, 0, len(st.queued))
@@ -81,7 +90,7 @@ func (st *DeletionState) GetQueued() (ids []string) {
 	return
 }
 
-func (st *DeletionState) Delete(id string) (err error) {
+func (st *deletionState) Delete(id string) (err error) {
 	st.Lock()
 	defer st.Unlock()
 	delete(st.queued, id)
@@ -93,13 +102,13 @@ func (st *DeletionState) Delete(id string) (err error) {
 	return
 }
 
-func (st *DeletionState) Exists(id string) bool {
+func (st *deletionState) Exists(id string) bool {
 	st.RLock()
 	defer st.RUnlock()
 	return st.exists(id)
 }
 
-func (st *DeletionState) FilterJoin(ids ...[]string) (filtered []string) {
+func (st *deletionState) FilterJoin(ids ...[]string) (filtered []string) {
 	st.RLock()
 	defer st.RUnlock()
 	filter := func(ids []string) {
@@ -115,7 +124,7 @@ func (st *DeletionState) FilterJoin(ids ...[]string) (filtered []string) {
 	return
 }
 
-func (st *DeletionState) exists(id string) bool {
+func (st *deletionState) exists(id string) bool {
 	if _, exists := st.deleted[id]; exists {
 		return true
 	}
diff --git a/common/commonspace/settingsdocument/idprovider.go b/common/commonspace/settingsdocument/idprovider.go
index 56fccab6..9ced17b3 100644
--- a/common/commonspace/settingsdocument/idprovider.go
+++ b/common/commonspace/settingsdocument/idprovider.go
@@ -1,4 +1,3 @@
-//go:generate mockgen -destination mock_settingsdocument/mock_settingsdocument.go github.com/anytypeio/go-anytype-infrastructure-experiments/common/commonspace/settingsdocument DeletedIdsProvider
 package settingsdocument
 
 import (
diff --git a/common/commonspace/settingsdocument/mock_settingsdocument/mock_settingsdocument.go b/common/commonspace/settingsdocument/mock_settingsdocument/mock_settingsdocument.go
index 4a8a58d8..7d950895 100644
--- a/common/commonspace/settingsdocument/mock_settingsdocument/mock_settingsdocument.go
+++ b/common/commonspace/settingsdocument/mock_settingsdocument/mock_settingsdocument.go
@@ -1,5 +1,5 @@
 // Code generated by MockGen. DO NOT EDIT.
-// Source: github.com/anytypeio/go-anytype-infrastructure-experiments/common/commonspace/settingsdocument (interfaces: DeletedIdsProvider)
+// Source: github.com/anytypeio/go-anytype-infrastructure-experiments/common/commonspace/settingsdocument (interfaces: DeletedIdsProvider,Deleter)
 
 // Package mock_settingsdocument is a generated GoMock package.
 package mock_settingsdocument
@@ -49,3 +49,38 @@ func (mr *MockDeletedIdsProviderMockRecorder) ProvideIds(arg0, arg1 interface{})
 	mr.mock.ctrl.T.Helper()
 	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "ProvideIds", reflect.TypeOf((*MockDeletedIdsProvider)(nil).ProvideIds), arg0, arg1)
 }
+
+// MockDeleter is a mock of Deleter interface.
+type MockDeleter struct {
+	ctrl     *gomock.Controller
+	recorder *MockDeleterMockRecorder
+}
+
+// MockDeleterMockRecorder is the mock recorder for MockDeleter.
+type MockDeleterMockRecorder struct {
+	mock *MockDeleter
+}
+
+// NewMockDeleter creates a new mock instance.
+func NewMockDeleter(ctrl *gomock.Controller) *MockDeleter {
+	mock := &MockDeleter{ctrl: ctrl}
+	mock.recorder = &MockDeleterMockRecorder{mock}
+	return mock
+}
+
+// EXPECT returns an object that allows the caller to indicate expected use.
+func (m *MockDeleter) EXPECT() *MockDeleterMockRecorder {
+	return m.recorder
+}
+
+// Delete mocks base method.
+func (m *MockDeleter) Delete() {
+	m.ctrl.T.Helper()
+	m.ctrl.Call(m, "Delete")
+}
+
+// Delete indicates an expected call of Delete.
+func (mr *MockDeleterMockRecorder) Delete() *gomock.Call {
+	mr.mock.ctrl.T.Helper()
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "Delete", reflect.TypeOf((*MockDeleter)(nil).Delete))
+}
diff --git a/common/commonspace/settingsdocument/settingsdocument.go b/common/commonspace/settingsdocument/settingsdocument.go
index 64d07987..7bb034a6 100644
--- a/common/commonspace/settingsdocument/settingsdocument.go
+++ b/common/commonspace/settingsdocument/settingsdocument.go
@@ -1,3 +1,4 @@
+//go:generate mockgen -destination mock_settingsdocument/mock_settingsdocument.go github.com/anytypeio/go-anytype-infrastructure-experiments/common/commonspace/settingsdocument DeletedIdsProvider,Deleter
 package settingsdocument
 
 import (
@@ -29,9 +30,10 @@ type Deps struct {
 	Account       account.Service
 	TreeGetter    treegetter.TreeGetter
 	Store         spacestorage.SpaceStorage
-	DeletionState *deletionstate.DeletionState
-	// prov exists mainly for the ease of testing
+	DeletionState deletionstate.DeletionState
+	// testing dependencies
 	prov DeletedIdsProvider
+	del  Deleter
 }
 
 type settingsDocument struct {
@@ -44,14 +46,20 @@ type settingsDocument struct {
 	buildFunc  BuildTreeFunc
 	loop       *deleteLoop
 
-	deletionState *deletionstate.DeletionState
+	deletionState deletionstate.DeletionState
 	lastChangeId  string
 }
 
-func NewSettingsDocument(deps Deps, spaceId string) (doc SettingsDocument, err error) {
-	deleter := newDeleter(deps.Store, deps.DeletionState, deps.TreeGetter)
+func NewSettingsDocument(deps Deps, spaceId string) (doc SettingsDocument) {
+	var deleter Deleter
+	if deps.del == nil {
+		deleter = newDeleter(deps.Store, deps.DeletionState, deps.TreeGetter)
+	} else {
+		deleter = deps.del
+	}
+
 	loop := newDeleteLoop(func() {
-		deleter.delete()
+		deleter.Delete()
 	})
 	deps.DeletionState.AddObserver(func(ids []string) {
 		loop.notify()
@@ -89,10 +97,12 @@ func (s *settingsDocument) updateIds(tr tree.ObjectTree, lastChangeId string) {
 	}
 }
 
+// Update is called as part of UpdateListener interface
 func (s *settingsDocument) Update(tr tree.ObjectTree) {
 	s.updateIds(tr, s.lastChangeId)
 }
 
+// Rebuild is called as part of UpdateListener interface (including when the object is built for the first time, e.g. on Init call)
 func (s *settingsDocument) Rebuild(tr tree.ObjectTree) {
 	// at initial build "s" may not contain the object tree, so it is safer to provide it from the function parameter
 	s.updateIds(tr, "")
@@ -128,6 +138,7 @@ func (s *settingsDocument) DeleteObject(id string) (err error) {
 		},
 		Snapshot: nil,
 	}
+	// TODO: add snapshot logic
 	res, err := change.Marshal()
 	if err != nil {
 		return
diff --git a/common/commonspace/settingsdocument/settingsdocument_test.go b/common/commonspace/settingsdocument/settingsdocument_test.go
index 43d929dc..9ee5a9e4 100644
--- a/common/commonspace/settingsdocument/settingsdocument_test.go
+++ b/common/commonspace/settingsdocument/settingsdocument_test.go
@@ -1,7 +1,108 @@
 package settingsdocument
 
-import "testing"
+import (
+	"context"
+	"github.com/anytypeio/go-anytype-infrastructure-experiments/common/account/mock_account"
+	"github.com/anytypeio/go-anytype-infrastructure-experiments/common/commonspace/settingsdocument/deletionstate"
+	"github.com/anytypeio/go-anytype-infrastructure-experiments/common/commonspace/settingsdocument/mock_settingsdocument"
+	"github.com/anytypeio/go-anytype-infrastructure-experiments/common/commonspace/storage/mock_storage"
+	"github.com/anytypeio/go-anytype-infrastructure-experiments/common/commonspace/synctree"
+	"github.com/anytypeio/go-anytype-infrastructure-experiments/common/commonspace/synctree/mock_synctree"
+	"github.com/anytypeio/go-anytype-infrastructure-experiments/common/commonspace/synctree/updatelistener"
+	"github.com/anytypeio/go-anytype-infrastructure-experiments/common/commonspace/treegetter/mock_treegetter"
+	"github.com/golang/mock/gomock"
+	"github.com/stretchr/testify/require"
+	"testing"
+	"time"
+)
+
+type settingsFixture struct {
+	spaceId      string
+	docId        string
+	doc          SettingsDocument
+	ctrl         *gomock.Controller
+	treeGetter   *mock_treegetter.MockTreeGetter
+	spaceStorage *mock_storage.MockSpaceStorage
+	provider     *mock_settingsdocument.MockDeletedIdsProvider
+	deleter      *mock_settingsdocument.MockDeleter
+	syncTree     *mock_synctree.MockSyncTree
+	delState     *deletionstate.DeletionState
+	account      *mock_account.MockService
+}
+
+func newSettingsFixture(t *testing.T) *settingsFixture {
+	spaceId := "spaceId"
+	docId := "documentId"
+
+	ctrl := gomock.NewController(t)
+	acc := mock_account.NewMockService(ctrl)
+	treeGetter := mock_treegetter.NewMockTreeGetter(ctrl)
+	st := mock_storage.NewMockSpaceStorage(ctrl)
+	delState := deletionstate.NewDeletionState(st)
+	prov := mock_settingsdocument.NewMockDeletedIdsProvider(ctrl)
+	syncTree := mock_synctree.NewMockSyncTree(ctrl)
+	del := mock_settingsdocument.NewMockDeleter(ctrl)
+
+	buildFunc := BuildTreeFunc(func(ctx context.Context, id string, listener updatelistener.UpdateListener) (synctree.SyncTree, error) {
+		require.Equal(t, docId, id)
+		return syncTree, nil
+	})
+
+	deps := Deps{
+		BuildFunc:     buildFunc,
+		Account:       acc,
+		TreeGetter:    treeGetter,
+		Store:         st,
+		DeletionState: delState,
+		prov:          prov,
+		del:           del,
+	}
+	doc := NewSettingsDocument(deps, spaceId)
+	return &settingsFixture{
+		spaceId:      spaceId,
+		docId:        docId,
+		doc:          doc,
+		ctrl:         ctrl,
+		treeGetter:   treeGetter,
+		spaceStorage: st,
+		provider:     prov,
+		deleter:      del,
+		syncTree:     syncTree,
+		account:      acc,
+		delState:     delState,
+	}
+}
+
+func (fx *settingsFixture) stop() {
+	fx.ctrl.Finish()
+}
 
 func TestSettingsDocument_Init(t *testing.T) {
+	fx := newSettingsFixture(t)
+	defer fx.stop()
 
+	fx.spaceStorage.EXPECT().SpaceSettingsId().Return(fx.docId)
+	fx.deleter.EXPECT().Delete()
+	fx.syncTree.EXPECT().Close().Return(nil)
+
+	err := fx.doc.Init(context.Background())
+	require.NoError(t, err)
+	err = fx.doc.Close()
+	require.NoError(t, err)
+}
+
+func TestSettingsDocument_DeleteObject(t *testing.T) {
+	fx := newSettingsFixture(t)
+	defer fx.stop()
+
+	fx.spaceStorage.EXPECT().SpaceSettingsId().Return(fx.docId)
+	fx.deleter.EXPECT().Delete()
+	fx.syncTree.EXPECT().Close().Return(nil)
+
+	err := fx.doc.Init(context.Background())
+	require.NoError(t, err)
+	time.Sleep(10 * time.Millisecond)
+
+	err = fx.doc.Close()
+	require.NoError(t, err)
 }
diff --git a/common/commonspace/space.go b/common/commonspace/space.go
index 78085be4..7401f30c 100644
--- a/common/commonspace/space.go
+++ b/common/commonspace/space.go
@@ -167,10 +167,7 @@ func (s *space) Init(ctx context.Context) (err error) {
 		Store:         s.storage,
 		DeletionState: deletionState,
 	}
-	s.settingsDocument, err = settingsdocument.NewSettingsDocument(deps, s.id)
-	if err != nil {
-		return
-	}
+	s.settingsDocument = settingsdocument.NewSettingsDocument(deps, s.id)
 
 	objectGetter := newCommonSpaceGetter(s.id, s.aclList, s.cache, s.settingsDocument)
 	s.syncService.Init(objectGetter)