diff --git a/packages/server/modules/notifications/domain/operations.ts b/packages/server/modules/notifications/domain/operations.ts
index 1c659dc96..74b76d0fd 100644
--- a/packages/server/modules/notifications/domain/operations.ts
+++ b/packages/server/modules/notifications/domain/operations.ts
@@ -3,3 +3,8 @@ import { NotificationPreferences } from '@/modules/notifications/helpers/types'
 export type GetSavedUserNotificationPreferences = (
   userId: string
 ) => Promise<NotificationPreferences>
+
+export type SaveUserNotificationPreferences = (
+  userId: string,
+  preferences: NotificationPreferences
+) => Promise<void>
diff --git a/packages/server/modules/notifications/graph/resolvers/userNotificationPreferences.ts b/packages/server/modules/notifications/graph/resolvers/userNotificationPreferences.ts
index debe9c522..f4f4faee7 100644
--- a/packages/server/modules/notifications/graph/resolvers/userNotificationPreferences.ts
+++ b/packages/server/modules/notifications/graph/resolvers/userNotificationPreferences.ts
@@ -1,9 +1,12 @@
 import { db } from '@/db/knex'
 import { Resolvers } from '@/modules/core/graph/generated/graphql'
-import { getSavedUserNotificationPreferencesFactory } from '@/modules/notifications/repositories'
 import {
-  updateNotificationPreferences,
-  getUserNotificationPreferencesFactory
+  getSavedUserNotificationPreferencesFactory,
+  saveUserNotificationPreferencesFactory
+} from '@/modules/notifications/repositories'
+import {
+  getUserNotificationPreferencesFactory,
+  updateNotificationPreferencesFactory
 } from '@/modules/notifications/services/notificationPreferences'
 
 const getUserNotificationPreferences = getUserNotificationPreferencesFactory({
@@ -12,6 +15,10 @@ const getUserNotificationPreferences = getUserNotificationPreferencesFactory({
   })
 })
 
+const updateNotificationPreferences = updateNotificationPreferencesFactory({
+  saveUserNotificationPreferences: saveUserNotificationPreferencesFactory({ db })
+})
+
 export = {
   User: {
     async notificationPreferences(parent) {
diff --git a/packages/server/modules/notifications/repositories.ts b/packages/server/modules/notifications/repositories.ts
index 4a2569302..fd78ad0d4 100644
--- a/packages/server/modules/notifications/repositories.ts
+++ b/packages/server/modules/notifications/repositories.ts
@@ -1,5 +1,8 @@
 import { UserNotificationPreferences } from '@/modules/core/dbSchema'
-import { GetSavedUserNotificationPreferences } from '@/modules/notifications/domain/operations'
+import {
+  GetSavedUserNotificationPreferences,
+  SaveUserNotificationPreferences
+} from '@/modules/notifications/domain/operations'
 import {
   NotificationPreferences,
   UserNotificationPreferencesRecord
@@ -22,12 +25,12 @@ export const getSavedUserNotificationPreferencesFactory =
     return userPreferences?.preferences ?? {}
   }
 
-export async function saveUserNotificationPreferences(
-  userId: string,
-  preferences: NotificationPreferences
-): Promise<void> {
-  await UserNotificationPreferences.knex()
-    .insert({ userId, preferences })
-    .onConflict('userId')
-    .merge()
-}
+export const saveUserNotificationPreferencesFactory =
+  (deps: { db: Knex }): SaveUserNotificationPreferences =>
+  async (userId: string, preferences: NotificationPreferences): Promise<void> => {
+    await tables
+      .userNotificationPreferences(deps.db)
+      .insert({ userId, preferences })
+      .onConflict('userId')
+      .merge()
+  }
diff --git a/packages/server/modules/notifications/services/notificationPreferences.ts b/packages/server/modules/notifications/services/notificationPreferences.ts
index 3134091ac..115e26458 100644
--- a/packages/server/modules/notifications/services/notificationPreferences.ts
+++ b/packages/server/modules/notifications/services/notificationPreferences.ts
@@ -1,11 +1,13 @@
-import * as repo from '@/modules/notifications/repositories'
 import {
   NotificationChannel,
   NotificationType,
   NotificationPreferences
 } from '@/modules/notifications/helpers/types'
 import { InvalidArgumentError } from '@/modules/shared/errors'
-import { GetSavedUserNotificationPreferences } from '@/modules/notifications/domain/operations'
+import {
+  GetSavedUserNotificationPreferences,
+  SaveUserNotificationPreferences
+} from '@/modules/notifications/domain/operations'
 
 export const getUserNotificationPreferencesFactory =
   (deps: {
@@ -32,35 +34,34 @@ function addDefaultPreferenceValues(
   return savedPreferences
 }
 
-export async function updateNotificationPreferences(
-  userId: string,
-  rawPreferences: Record<string, unknown>
-): Promise<void> {
-  const parsedPreferences: NotificationPreferences = {}
-  // lets do some nested attribute copying, to sanitize the input
-  for (const key in rawPreferences) {
-    if (!Object.values(NotificationType).includes(key as NotificationType))
-      throw new InvalidArgumentError(
-        `Notification preferences input contains an unknown setting: ${key}`
-      )
-    const nt = key as NotificationType
-    const notificationTypePreferences: Partial<Record<NotificationChannel, boolean>> =
-      {}
-    const notificationTypeSettings = rawPreferences[nt] as Record<string, unknown>
-    for (const ncKey in notificationTypeSettings) {
-      if (!Object.values(NotificationChannel).includes(ncKey as NotificationChannel))
+export const updateNotificationPreferencesFactory =
+  (deps: { saveUserNotificationPreferences: SaveUserNotificationPreferences }) =>
+  async (userId: string, rawPreferences: Record<string, unknown>): Promise<void> => {
+    const parsedPreferences: NotificationPreferences = {}
+    // lets do some nested attribute copying, to sanitize the input
+    for (const key in rawPreferences) {
+      if (!Object.values(NotificationType).includes(key as NotificationType))
         throw new InvalidArgumentError(
-          `Notification preferences input contains an unknown setting: ${ncKey}`
+          `Notification preferences input contains an unknown setting: ${key}`
         )
-      const nc = ncKey as NotificationChannel
-      const preferenceValue = notificationTypeSettings[nc]
-      if (typeof preferenceValue !== 'boolean')
-        throw new InvalidArgumentError(
-          `Notification preferences input contains and invalid value: ${preferenceValue}`
-        )
-      notificationTypePreferences[nc] = preferenceValue
+      const nt = key as NotificationType
+      const notificationTypePreferences: Partial<Record<NotificationChannel, boolean>> =
+        {}
+      const notificationTypeSettings = rawPreferences[nt] as Record<string, unknown>
+      for (const ncKey in notificationTypeSettings) {
+        if (!Object.values(NotificationChannel).includes(ncKey as NotificationChannel))
+          throw new InvalidArgumentError(
+            `Notification preferences input contains an unknown setting: ${ncKey}`
+          )
+        const nc = ncKey as NotificationChannel
+        const preferenceValue = notificationTypeSettings[nc]
+        if (typeof preferenceValue !== 'boolean')
+          throw new InvalidArgumentError(
+            `Notification preferences input contains and invalid value: ${preferenceValue}`
+          )
+        notificationTypePreferences[nc] = preferenceValue
+      }
+      parsedPreferences[nt] = notificationTypePreferences
     }
-    parsedPreferences[nt] = notificationTypePreferences
+    return await deps.saveUserNotificationPreferences(userId, parsedPreferences)
   }
-  return await repo.saveUserNotificationPreferences(userId, parsedPreferences)
-}
diff --git a/packages/server/modules/notifications/tests/notificationsPreferences.spec.ts b/packages/server/modules/notifications/tests/notificationsPreferences.spec.ts
index 372d9a16f..559291328 100644
--- a/packages/server/modules/notifications/tests/notificationsPreferences.spec.ts
+++ b/packages/server/modules/notifications/tests/notificationsPreferences.spec.ts
@@ -1,15 +1,20 @@
 import { truncateTables } from '@/test/hooks'
 import { UserNotificationPreferences, Users } from '@/modules/core/dbSchema'
 import { BasicTestUser, createTestUsers } from '@/test/authHelper'
-import * as services from '@/modules/notifications/services/notificationPreferences'
 import { expect } from 'chai'
 import {
   NotificationType,
   NotificationChannel
 } from '@/modules/notifications/helpers/types'
 import { BaseError } from '@/modules/shared/errors'
-import { getUserNotificationPreferencesFactory } from '@/modules/notifications/services/notificationPreferences'
-import { getSavedUserNotificationPreferencesFactory } from '@/modules/notifications/repositories'
+import {
+  getUserNotificationPreferencesFactory,
+  updateNotificationPreferencesFactory
+} from '@/modules/notifications/services/notificationPreferences'
+import {
+  getSavedUserNotificationPreferencesFactory,
+  saveUserNotificationPreferencesFactory
+} from '@/modules/notifications/repositories'
 import { db } from '@/db/knex'
 
 const getSavedUserNotificationPreferences = getSavedUserNotificationPreferencesFactory({
@@ -18,6 +23,9 @@ const getSavedUserNotificationPreferences = getSavedUserNotificationPreferencesF
 const getUserNotificationPreferences = getUserNotificationPreferencesFactory({
   getSavedUserNotificationPreferences
 })
+const updateNotificationPreferences = updateNotificationPreferencesFactory({
+  saveUserNotificationPreferences: saveUserNotificationPreferencesFactory({ db })
+})
 
 const cleanup = async () => {
   await truncateTables([Users.name, UserNotificationPreferences.name])
@@ -49,13 +57,13 @@ describe('User notification preferences @notifications', () => {
       }
     })
     it('store notification settings', async () => {
-      await services.updateNotificationPreferences(userA.id, {
+      await updateNotificationPreferences(userA.id, {
         activityDigest: { email: false }
       })
       let preferences = await getUserNotificationPreferences(userA.id)
       expect(preferences).to.not.be.empty
       expect(preferences.activityDigest?.email).to.be.false
-      await services.updateNotificationPreferences(userA.id, {
+      await updateNotificationPreferences(userA.id, {
         activityDigest: { email: true }
       })
       preferences = await getUserNotificationPreferences(userA.id)
@@ -81,7 +89,7 @@ describe('User notification preferences @notifications', () => {
           // eslint-disable-next-line @typescript-eslint/ban-ts-comment
           //@ts-ignore
           preferences[nt][nc] = value
-          await services.updateNotificationPreferences(userA.id, preferences)
+          await updateNotificationPreferences(userA.id, preferences)
         } catch (err) {
           expect(err instanceof BaseError)
           const error = err as BaseError