diff --git a/backend/src/graphql/resolver/UserResolver.test.ts b/backend/src/graphql/resolver/UserResolver.test.ts
index c658476a4..67edceb59 100644
--- a/backend/src/graphql/resolver/UserResolver.test.ts
+++ b/backend/src/graphql/resolver/UserResolver.test.ts
@@ -12,7 +12,28 @@ import { User } from '@entity/User'
 import CONFIG from '@/config'
 import { sendAccountActivationEmail } from '@/mailer/sendAccountActivationEmail'
 import { sendResetPasswordEmail } from '@/mailer/sendResetPasswordEmail'
-import { printTimeDuration, activationLink } from './UserResolver'
+import { printTimeDuration, activationLink, logger } from './UserResolver'
+
+import { getLogger } from '@/server/logger'
+
+jest.mock('@/server/logger', () => {
+  const originalModule = jest.requireActual('@/server/logger')
+  return {
+    __esModule: true,
+    ...originalModule,
+    getLogger: jest.fn(() => {
+      return {
+        addContext: jest.fn(),
+        trace: jest.fn(),
+        debug: jest.fn(),
+        warn: jest.fn(),
+        info: jest.fn(),
+        error: jest.fn(),
+        fatal: jest.fn(),
+      }
+    }),
+  }
+})
 
 // import { klicktippSignIn } from '@/apis/KlicktippController'
 
@@ -56,6 +77,16 @@ afterAll(async () => {
 })
 
 describe('UserResolver', () => {
+  describe('logger', () => {
+    it('creates a logger', () => {
+      expect(getLogger).toBeCalledWith('backend.graphql.resolver.UserResolver')
+    })
+
+    it('adds user context to logger', () => {
+      expect(logger.addContext).toBeCalledWith('user', 'unknown')
+    })
+  })
+
   describe('createUser', () => {
     const variables = {
       email: 'peter@lustig.de',
@@ -149,12 +180,14 @@ describe('UserResolver', () => {
     })
 
     describe('email already exists', () => {
-      it('throws an error', async () => {
-        await expect(mutate({ mutation: createUser, variables })).resolves.toEqual(
+      it('throws and logs an error', async () => {
+        const mutation = await mutate({ mutation: createUser, variables })
+        expect(mutation).toEqual(
           expect.objectContaining({
             errors: [new GraphQLError('User already exists.')],
           }),
         )
+        expect(logger.error).toBeCalledWith('User already exists with this email=peter@lustig.de')
       })
     })
 
diff --git a/backend/src/graphql/resolver/UserResolver.ts b/backend/src/graphql/resolver/UserResolver.ts
index df6e1a715..9ad908111 100644
--- a/backend/src/graphql/resolver/UserResolver.ts
+++ b/backend/src/graphql/resolver/UserResolver.ts
@@ -1,5 +1,5 @@
 import fs from 'fs'
-import log4js from '@/server/logger'
+import { getLogger } from '@/server/logger'
 
 import { Context, getUser } from '@/server/context'
 import { Resolver, Query, Args, Arg, Authorized, Ctx, UseMiddleware, Mutation } from 'type-graphql'
@@ -28,7 +28,7 @@ const sodium = require('sodium-native')
 // eslint-disable-next-line @typescript-eslint/no-var-requires
 const random = require('random-bigint')
 
-const logger = log4js.getLogger('backend.graphql.resolver.UserResolver')
+export const logger = getLogger('backend.graphql.resolver.UserResolver')
 logger.addContext('user', 'unknown')
 
 // We will reuse this for changePassword
diff --git a/backend/src/server/logger.ts b/backend/src/server/logger.ts
index 057c55307..dc0fd8602 100644
--- a/backend/src/server/logger.ts
+++ b/backend/src/server/logger.ts
@@ -1,6 +1,10 @@
-import log4js from 'log4js'
+import log4js, { Logger } from 'log4js'
 import CONFIG from '@/config'
 
 log4js.configure(CONFIG.LOG4JS_CONFIG)
 
+export const getLogger = (name: string): Logger => {
+  return log4js.getLogger(name)
+}
+
 export default log4js