diff --git a/backend/src/graphql/resolver/KlicktippResolver.test.ts b/backend/src/graphql/resolver/KlicktippResolver.test.ts
new file mode 100644
index 000000000..860444b88
--- /dev/null
+++ b/backend/src/graphql/resolver/KlicktippResolver.test.ts
@@ -0,0 +1,134 @@
+import { cleanDB, resetToken, testEnvironment } from '@test/helpers'
+import { userFactory } from '@/seeds/factory/user'
+import { logger, i18n as localization } from '@test/testSetup'
+import { bibiBloxberg } from '@/seeds/users/bibi-bloxberg'
+import { login, subscribeNewsletter, unsubscribeNewsletter } from '@/seeds/graphql/mutations'
+import { GraphQLError } from 'graphql'
+import { UserContact } from '@entity/UserContact'
+import { Event as DbEvent } from '@entity/Event'
+import { EventType } from '@/event/Event'
+
+let testEnv: any, mutate: any, query: any, con: any
+
+beforeAll(async () => {
+  testEnv = await testEnvironment(logger, localization)
+  mutate = testEnv.mutate
+  query = testEnv.query
+  con = testEnv.con
+  await cleanDB()
+})
+
+afterAll(async () => {
+  await cleanDB()
+  await con.close()
+})
+
+describe('KlicktippResolver', () => {
+  let bibi
+
+  beforeAll(async () => {
+    bibi = await userFactory(testEnv, bibiBloxberg)
+  })
+
+  afterAll(async () => {
+    await cleanDB()
+  })
+
+  describe('subscribeNewsletter', () => {
+    describe('unauthenticated', () => {
+      it('returns an error', async () => {
+        const { errors: errorObjects }: { errors: [GraphQLError] } = await mutate({
+          mutation: subscribeNewsletter,
+        })
+
+        expect(errorObjects).toEqual([new GraphQLError('401 Unauthorized')])
+      })
+    })
+
+    describe('authenticated', () => {
+      beforeAll(async () => {
+        await mutate({
+          mutation: login,
+          variables: { email: 'bibi@bloxberg.de', password: 'Aa12345_' },
+        })
+      })
+
+      afterAll(() => {
+        resetToken()
+      })
+
+      it('calls API', async () => {
+        const {
+          data: { subscribeNewsletter: isSubscribed },
+        }: { data: { subscribeNewsletter: boolean } } = await mutate({
+          mutation: subscribeNewsletter,
+        })
+
+        expect(isSubscribed).toEqual(true)
+      })
+
+      it('stores the SUBSCRIBE_NEWSLETTER event in the database', async () => {
+        const userConatct = await UserContact.findOneOrFail(
+          { email: 'bibi@bloxberg.de' },
+          { relations: ['user'] },
+        )
+        await expect(DbEvent.find()).resolves.toContainEqual(
+          expect.objectContaining({
+            type: EventType.SUBSCRIBE_NEWSLETTER,
+            affectedUserId: userConatct.user.id,
+            actingUserId: userConatct.user.id,
+          }),
+        )
+      })
+    })
+  })
+
+  describe('unsubscribeNewsletter', () => {
+    describe('unauthenticated', () => {
+      it('returns an error', async () => {
+        const { errors: errorObjects }: { errors: [GraphQLError] } = await mutate({
+          mutation: unsubscribeNewsletter,
+        })
+
+        expect(errorObjects).toEqual([new GraphQLError('401 Unauthorized')])
+      })
+    })
+
+    describe('authenticated', () => {
+      beforeAll(async () => {
+        await mutate({
+          mutation: login,
+          variables: { email: 'bibi@bloxberg.de', password: 'Aa12345_' },
+        })
+      })
+
+      afterAll(() => {
+        resetToken()
+      })
+
+      it('calls API', async () => {
+        const {
+          data: { unsubscribeNewsletter: isUnsubscribed },
+        }: { data: { unsubscribeNewsletter: boolean } } = await mutate({
+          mutation: unsubscribeNewsletter,
+        })
+
+        expect(isUnsubscribed).toEqual(true)
+      })
+
+      it('stores the UNSUBSCRIBE_NEWSLETTER event in the database', async () => {
+        const userConatct = await UserContact.findOneOrFail(
+          { email: 'bibi@bloxberg.de' },
+          { relations: ['user'] },
+        )
+        await expect(DbEvent.find()).resolves.toContainEqual(
+          expect.objectContaining({
+            type: EventType.UNSUBSCRIBE_NEWSLETTER,
+            affectedUserId: userConatct.user.id,
+            actingUserId: userConatct.user.id,
+          }),
+        )
+      })
+    })
+  })
+})