diff --git a/common/commonspace/diffservice/diffservice.go b/common/commonspace/diffservice/diffservice.go
index e5a94a1f..44401783 100644
--- a/common/commonspace/diffservice/diffservice.go
+++ b/common/commonspace/diffservice/diffservice.go
@@ -1,3 +1,4 @@
+//go:generate mockgen -destination mock_diffservice/mock_diffservice.go github.com/anytypeio/go-anytype-infrastructure-experiments/common/commonspace/diffservice DiffSyncer
 package diffservice
 
 import (
diff --git a/common/commonspace/diffservice/mock_diffservice/mock_diffservice.go b/common/commonspace/diffservice/mock_diffservice/mock_diffservice.go
new file mode 100644
index 00000000..6f22a1a4
--- /dev/null
+++ b/common/commonspace/diffservice/mock_diffservice/mock_diffservice.go
@@ -0,0 +1,49 @@
+// Code generated by MockGen. DO NOT EDIT.
+// Source: github.com/anytypeio/go-anytype-infrastructure-experiments/common/commonspace/diffservice (interfaces: DiffSyncer)
+
+// Package mock_diffservice is a generated GoMock package.
+package mock_diffservice
+
+import (
+	context "context"
+	reflect "reflect"
+
+	gomock "github.com/golang/mock/gomock"
+)
+
+// MockDiffSyncer is a mock of DiffSyncer interface.
+type MockDiffSyncer struct {
+	ctrl     *gomock.Controller
+	recorder *MockDiffSyncerMockRecorder
+}
+
+// MockDiffSyncerMockRecorder is the mock recorder for MockDiffSyncer.
+type MockDiffSyncerMockRecorder struct {
+	mock *MockDiffSyncer
+}
+
+// NewMockDiffSyncer creates a new mock instance.
+func NewMockDiffSyncer(ctrl *gomock.Controller) *MockDiffSyncer {
+	mock := &MockDiffSyncer{ctrl: ctrl}
+	mock.recorder = &MockDiffSyncerMockRecorder{mock}
+	return mock
+}
+
+// EXPECT returns an object that allows the caller to indicate expected use.
+func (m *MockDiffSyncer) EXPECT() *MockDiffSyncerMockRecorder {
+	return m.recorder
+}
+
+// Sync mocks base method.
+func (m *MockDiffSyncer) Sync(arg0 context.Context) error {
+	m.ctrl.T.Helper()
+	ret := m.ctrl.Call(m, "Sync", arg0)
+	ret0, _ := ret[0].(error)
+	return ret0
+}
+
+// Sync indicates an expected call of Sync.
+func (mr *MockDiffSyncerMockRecorder) Sync(arg0 interface{}) *gomock.Call {
+	mr.mock.ctrl.T.Helper()
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "Sync", reflect.TypeOf((*MockDiffSyncer)(nil).Sync), arg0)
+}
diff --git a/common/commonspace/diffservice/periodicsync_test.go b/common/commonspace/diffservice/periodicsync_test.go
new file mode 100644
index 00000000..5b7c7e41
--- /dev/null
+++ b/common/commonspace/diffservice/periodicsync_test.go
@@ -0,0 +1,39 @@
+package diffservice
+
+import (
+	"github.com/anytypeio/go-anytype-infrastructure-experiments/app/logger"
+	"github.com/anytypeio/go-anytype-infrastructure-experiments/common/commonspace/diffservice/mock_diffservice"
+	"github.com/golang/mock/gomock"
+	"testing"
+	"time"
+)
+
+func TestPeriodicSync_Run(t *testing.T) {
+	// setup
+	//ctx := context.Background()
+	ctrl := gomock.NewController(t)
+	defer ctrl.Finish()
+
+	l := logger.NewNamed("sync")
+	diffSyncer := mock_diffservice.NewMockDiffSyncer(ctrl)
+	t.Run("diff syncer 1 time", func(t *testing.T) {
+		secs := 0
+		pSync := newPeriodicSync(secs, diffSyncer, l)
+
+		diffSyncer.EXPECT().Sync(gomock.Any()).Times(1).Return(nil)
+
+		pSync.Run()
+		pSync.Close()
+	})
+
+	t.Run("diff syncer 2 times", func(t *testing.T) {
+		secs := 1
+
+		pSync := newPeriodicSync(secs, diffSyncer, l)
+		diffSyncer.EXPECT().Sync(gomock.Any()).Times(2).Return(nil)
+
+		pSync.Run()
+		time.Sleep(time.Second * time.Duration(secs))
+		pSync.Close()
+	})
+}