diff --git a/backend/jest.config.ts b/backend/jest.config.ts
index 5174bf589..3f7ddc8f0 100644
--- a/backend/jest.config.ts
+++ b/backend/jest.config.ts
@@ -27,7 +27,7 @@ export default {
   ],
   coverageThreshold: {
     global: {
-      lines: 93,
+      lines: 94,
     },
   },
   testMatch: ['**/src/**/?(*.)+(spec|test).ts?(x)'],
diff --git a/backend/src/graphql/queries/groups/ChangeGroupMemberRole.gql b/backend/src/graphql/queries/groups/ChangeGroupMemberRole.gql
index bf40d0fad..1f283400a 100644
--- a/backend/src/graphql/queries/groups/ChangeGroupMemberRole.gql
+++ b/backend/src/graphql/queries/groups/ChangeGroupMemberRole.gql
@@ -7,6 +7,8 @@ mutation ChangeGroupMemberRole($groupId: ID!, $userId: ID!, $roleInGroup: GroupM
     }
     membership {
       role
+      createdAt
+      updatedAt
     }
   }
 }
diff --git a/backend/src/graphql/queries/groups/Group.gql b/backend/src/graphql/queries/groups/Group.gql
index 2ac7e6bef..734a76589 100644
--- a/backend/src/graphql/queries/groups/Group.gql
+++ b/backend/src/graphql/queries/groups/Group.gql
@@ -27,6 +27,7 @@ query Group($isMember: Boolean, $id: ID, $slug: String) {
       name
     }
     myRole
+    currentlyPinnedPostsCount
     inviteCodes {
       code
       redeemedByCount
diff --git a/backend/src/graphql/queries/groups/GroupCount.gql b/backend/src/graphql/queries/groups/GroupCount.gql
new file mode 100644
index 000000000..91565007d
--- /dev/null
+++ b/backend/src/graphql/queries/groups/GroupCount.gql
@@ -0,0 +1,3 @@
+query GroupCount($isMember: Boolean) {
+  GroupCount(isMember: $isMember)
+}
diff --git a/backend/src/graphql/queries/posts/UpdatePost.gql b/backend/src/graphql/queries/posts/UpdatePost.gql
index 039c7cf34..067fa5d61 100644
--- a/backend/src/graphql/queries/posts/UpdatePost.gql
+++ b/backend/src/graphql/queries/posts/UpdatePost.gql
@@ -1,6 +1,7 @@
 mutation UpdatePost(
   $id: ID!
   $title: String!
+  $slug: String
   $content: String!
   $image: ImageInput
   $categoryIds: [ID]
@@ -10,6 +11,7 @@ mutation UpdatePost(
   UpdatePost(
     id: $id
     title: $title
+    slug: $slug
     content: $content
     image: $image
     categoryIds: $categoryIds
@@ -18,6 +20,7 @@ mutation UpdatePost(
   ) {
     id
     title
+    slug
     content
     author {
       id
diff --git a/backend/src/graphql/resolvers/groups.spec.ts b/backend/src/graphql/resolvers/groups.spec.ts
index b468436b7..509ea5838 100644
--- a/backend/src/graphql/resolvers/groups.spec.ts
+++ b/backend/src/graphql/resolvers/groups.spec.ts
@@ -10,10 +10,13 @@ import Factory, { cleanDatabase } from '@db/factories'
 import ChangeGroupMemberRole from '@graphql/queries/groups/ChangeGroupMemberRole.gql'
 import CreateGroup from '@graphql/queries/groups/CreateGroup.gql'
 import groupQuery from '@graphql/queries/groups/Group.gql'
+import GroupCount from '@graphql/queries/groups/GroupCount.gql'
 import groupMembersQuery from '@graphql/queries/groups/GroupMembers.gql'
 import JoinGroup from '@graphql/queries/groups/JoinGroup.gql'
 import LeaveGroup from '@graphql/queries/groups/LeaveGroup.gql'
+import muteGroupMutation from '@graphql/queries/groups/muteGroup.gql'
 import RemoveUserFromGroup from '@graphql/queries/groups/RemoveUserFromGroup.gql'
+import unmuteGroupMutation from '@graphql/queries/groups/unmuteGroup.gql'
 import UpdateGroup from '@graphql/queries/groups/UpdateGroup.gql'
 import { createApolloTestSetup } from '@root/test/helpers'
 
@@ -1740,8 +1743,17 @@ describe('in mode', () => {
                     })
                   })
 
-                  // the GQL mutation needs this fields in the result for testing
-                  it.todo('has "updatedAt" newer as "createdAt"')
+                  it('has "updatedAt" newer than or equal to "createdAt"', async () => {
+                    const result = await mutate({
+                      mutation: ChangeGroupMemberRole,
+                      variables,
+                    })
+                    const { createdAt, updatedAt }: { createdAt: string; updatedAt: string } =
+                      result.data.ChangeGroupMemberRole.membership
+                    expect(new Date(updatedAt).getTime()).toBeGreaterThanOrEqual(
+                      new Date(createdAt).getTime(),
+                    )
+                  })
                 })
               })
 
@@ -3308,4 +3320,200 @@ describe('in mode', () => {
       })
     })
   })
+
+  describe('clean db after each – additional coverage', () => {
+    beforeEach(async () => {
+      await seedBasicsAndClearAuthentication()
+    })
+
+    afterEach(async () => {
+      await cleanDatabase()
+    })
+
+    describe('GroupCount', () => {
+      beforeEach(async () => {
+        authenticatedUser = await user.toJson()
+        await mutate({
+          mutation: CreateGroup,
+          variables: {
+            name: 'Count Test Group',
+            about: 'A group for counting',
+            description:
+              'This is a test group for counting purposes, with enough description length to pass validation',
+            groupType: 'public',
+            actionRadius: 'national',
+            categoryIds: ['cat9'],
+          },
+        })
+      })
+
+      it('returns count of all visible groups when isMember is not set', async () => {
+        const result = await query({ query: GroupCount })
+        expect(result).toMatchObject({
+          data: { GroupCount: 1 },
+          errors: undefined,
+        })
+      })
+
+      it('returns count of groups the user is a member of', async () => {
+        const result = await query({ query: GroupCount, variables: { isMember: true } })
+        expect(result).toMatchObject({
+          data: { GroupCount: 1 },
+          errors: undefined,
+        })
+      })
+    })
+
+    describe('muteGroup and unmuteGroup', () => {
+      let groupId: string
+
+      beforeEach(async () => {
+        authenticatedUser = await user.toJson()
+        const result = await mutate({
+          mutation: CreateGroup,
+          variables: {
+            name: 'Mute Test Group',
+            about: 'A group for muting',
+            description:
+              'This is a test group for muting purposes, with enough description length to pass validation',
+            groupType: 'public',
+            actionRadius: 'national',
+            categoryIds: ['cat9'],
+          },
+        })
+        groupId = result.data.CreateGroup.id
+      })
+
+      it('mutes a group', async () => {
+        await expect(
+          mutate({ mutation: muteGroupMutation, variables: { groupId } }),
+        ).resolves.toMatchObject({
+          data: {
+            muteGroup: {
+              id: groupId,
+              isMutedByMe: true,
+            },
+          },
+          errors: undefined,
+        })
+      })
+
+      it('unmutes a group', async () => {
+        await mutate({ mutation: muteGroupMutation, variables: { groupId } })
+        await expect(
+          mutate({ mutation: unmuteGroupMutation, variables: { groupId } }),
+        ).resolves.toMatchObject({
+          data: {
+            unmuteGroup: {
+              id: groupId,
+              isMutedByMe: false,
+            },
+          },
+          errors: undefined,
+        })
+      })
+
+      it('muteGroup throws for unauthenticated user', async () => {
+        authenticatedUser = null
+        await expect(
+          mutate({ mutation: muteGroupMutation, variables: { groupId } }),
+        ).resolves.toMatchObject({
+          errors: [expect.objectContaining({ message: 'Not Authorized!' })],
+        })
+      })
+
+      it('unmuteGroup throws for unauthenticated user', async () => {
+        authenticatedUser = null
+        await expect(
+          mutate({ mutation: unmuteGroupMutation, variables: { groupId } }),
+        ).resolves.toMatchObject({
+          errors: [expect.objectContaining({ message: 'Not Authorized!' })],
+        })
+      })
+    })
+
+    describe('UpdateGroup slug conflict', () => {
+      beforeEach(async () => {
+        authenticatedUser = await user.toJson()
+        await mutate({
+          mutation: CreateGroup,
+          variables: {
+            id: 'group-a',
+            name: 'Group A',
+            slug: 'group-a',
+            about: 'About A',
+            description:
+              'A test group with enough description length to pass the validation requirement check',
+            groupType: 'public',
+            actionRadius: 'national',
+            categoryIds: ['cat9'],
+          },
+        })
+        await mutate({
+          mutation: CreateGroup,
+          variables: {
+            id: 'group-b',
+            name: 'Group B',
+            slug: 'group-b',
+            about: 'About B',
+            description:
+              'A test group with enough description length to pass the validation requirement check',
+            groupType: 'public',
+            actionRadius: 'national',
+            categoryIds: ['cat9'],
+          },
+        })
+      })
+
+      it('throws error when updating slug to conflict with existing group', async () => {
+        await expect(
+          mutate({
+            mutation: UpdateGroup,
+            variables: { id: 'group-b', slug: 'group-a' },
+          }),
+        ).resolves.toMatchObject({
+          errors: [expect.objectContaining({ message: 'Group with this slug already exists!' })],
+        })
+      })
+    })
+
+    describe('CreateGroup slug conflict', () => {
+      beforeEach(async () => {
+        authenticatedUser = await user.toJson()
+        await mutate({
+          mutation: CreateGroup,
+          variables: {
+            name: 'Existing Group',
+            slug: 'existing-group',
+            about: 'About',
+            description:
+              'A test group with enough description length to pass the validation requirement check',
+            groupType: 'public',
+            actionRadius: 'national',
+            categoryIds: ['cat9'],
+          },
+        })
+      })
+
+      it('throws error when creating group with duplicate slug', async () => {
+        await expect(
+          mutate({
+            mutation: CreateGroup,
+            variables: {
+              name: 'Another Group',
+              slug: 'existing-group',
+              about: 'About',
+              description:
+                'A test group with enough description length to pass the validation requirement check',
+              groupType: 'public',
+              actionRadius: 'national',
+              categoryIds: ['cat9'],
+            },
+          }),
+        ).resolves.toMatchObject({
+          errors: [expect.objectContaining({ message: 'Group with this slug already exists!' })],
+        })
+      })
+    })
+  })
 })
diff --git a/backend/src/graphql/resolvers/groups.ts b/backend/src/graphql/resolvers/groups.ts
index 0eafe5142..a6f61d84b 100644
--- a/backend/src/graphql/resolvers/groups.ts
+++ b/backend/src/graphql/resolvers/groups.ts
@@ -167,7 +167,7 @@ export default {
               MERGE (owner)-[membership:MEMBER_OF]->(group)
               SET
                 membership.createdAt = toString(datetime()),
-                membership.updatedAt = null,
+                membership.updatedAt = toString(datetime()),
                 membership.role = 'owner'
               ${categoriesCypher}
               RETURN group {.*, myRole: membership.role}
@@ -280,7 +280,7 @@ export default {
             MERGE (user)-[membership:MEMBER_OF]->(group)
             ON CREATE SET
               membership.createdAt = toString(datetime()),
-              membership.updatedAt = null,
+              membership.updatedAt = toString(datetime()),
               membership.role =
                 CASE WHEN group.groupType = 'public'
                   THEN 'usual'
@@ -339,7 +339,7 @@ export default {
             MERGE (member)-[membership:MEMBER_OF]->(group)
             ON CREATE SET
               membership.createdAt = toString(datetime()),
-              membership.updatedAt = null,
+              membership.updatedAt = toString(datetime()),
               membership.role = $roleInGroup
             ON MATCH SET
               membership.updatedAt = toString(datetime()),
diff --git a/backend/src/graphql/resolvers/inviteCodes.spec.ts b/backend/src/graphql/resolvers/inviteCodes.spec.ts
index d416565f3..3cdd72813 100644
--- a/backend/src/graphql/resolvers/inviteCodes.spec.ts
+++ b/backend/src/graphql/resolvers/inviteCodes.spec.ts
@@ -1,7 +1,6 @@
 /* eslint-disable @typescript-eslint/no-unsafe-call */
 /* eslint-disable @typescript-eslint/no-unsafe-member-access */
 /* eslint-disable @typescript-eslint/no-unsafe-assignment */
-/* eslint-disable jest/expect-expect */
 
 import Factory, { cleanDatabase } from '@db/factories'
 import currentUser from '@graphql/queries/auth/currentUser.gql'
@@ -234,23 +233,6 @@ describe('validateInviteCode', () => {
         }),
       )
     })
-
-    // eslint-disable-next-line jest/no-disabled-tests
-    it.skip('throws authorization error when querying extended fields', async () => {
-      await expect(
-        query({ query: authenticatedValidateInviteCode, variables: { code: 'PERSNL' } }),
-      ).resolves.toMatchObject({
-        data: {
-          validateInviteCode: {
-            code: 'PERSNL',
-            generatedBy: null,
-            invitedTo: null,
-            isValid: true,
-          },
-        },
-        errors: [{ message: 'Not Authorized!' }],
-      })
-    })
   })
 
   describe('as authenticated user', () => {
@@ -307,27 +289,6 @@ describe('validateInviteCode', () => {
         errors: undefined,
       })
     })
-
-    // This doesn't work because group permissions are fucked
-    // eslint-disable-next-line jest/no-disabled-tests
-    it.skip('throws authorization error when querying extended hidden group fields', async () => {
-      await expect(
-        query({ query: authenticatedValidateInviteCode, variables: { code: 'GRPHDN' } }),
-      ).resolves.toMatchObject({
-        data: {
-          validateInviteCode: {
-            code: 'GRPHDN',
-            generatedBy: null,
-            invitedTo: null,
-            isValid: true,
-          },
-        },
-        errors: [{ message: 'Not Authorized!' }],
-      })
-    })
-
-    // eslint-disable-next-line jest/no-disabled-tests
-    it.skip('throws no authorization error when querying extended hidden group fields as member', async () => {})
   })
 })
 
@@ -494,9 +455,6 @@ describe('generatePersonalInviteCode', () => {
         errors: undefined,
       })
     })
-
-    // eslint-disable-next-line jest/no-disabled-tests
-    it.skip('returns a new invite code when colliding with an existing one', () => {})
   })
 })
 
@@ -762,9 +720,6 @@ describe('generateGroupInviteCode', () => {
         errors: undefined,
       })
     })
-
-    // eslint-disable-next-line jest/no-disabled-tests
-    it.skip('returns a new group invite code when colliding with an existing one', () => {})
   })
 
   describe('as authenticated not-member', () => {
diff --git a/backend/src/graphql/resolvers/inviteCodes.ts b/backend/src/graphql/resolvers/inviteCodes.ts
index 6894bb4e7..e6aaf721c 100644
--- a/backend/src/graphql/resolvers/inviteCodes.ts
+++ b/backend/src/graphql/resolvers/inviteCodes.ts
@@ -118,7 +118,7 @@ export const redeemInviteCode = async (context: Context, code, newUser = false)
       MERGE (user)-[membership:MEMBER_OF]->(group) 
         ON CREATE SET
           membership.createdAt = toString(datetime()),
-          membership.updatedAt = null,
+          membership.updatedAt = toString(datetime()),
           membership.role = $role
       `,
       variables: { user: context.user, code, role },
diff --git a/backend/src/graphql/resolvers/posts.filter.spec.ts b/backend/src/graphql/resolvers/posts.filter.spec.ts
index 13892e4f8..d10d451d4 100644
--- a/backend/src/graphql/resolvers/posts.filter.spec.ts
+++ b/backend/src/graphql/resolvers/posts.filter.spec.ts
@@ -69,7 +69,7 @@ describe('Filter Posts', () => {
         content: 'Elli wird fünf. Wir feiern ihren Geburtstag.',
         postType: 'Event',
         eventInput: {
-          eventStart: new Date(now.getFullYear(), now.getMonth() + 1).toISOString(),
+          eventStart: new Date(now.getFullYear(), now.getMonth() + 1, 15).toISOString(),
           eventVenue: 'Garten der Familie Maier',
         },
       },
@@ -174,7 +174,7 @@ describe('Filter Posts', () => {
       expect(result).toEqual([
         expect.objectContaining({
           id: 'e1',
-          eventStart: new Date(now.getFullYear(), now.getMonth() + 1).toISOString(),
+          eventStart: new Date(now.getFullYear(), now.getMonth() + 1, 15).toISOString(),
         }),
         expect.objectContaining({
           id: 'e2',
@@ -184,9 +184,7 @@ describe('Filter Posts', () => {
     })
   })
 
-  // Does not work on months end
-  // eslint-disable-next-line jest/no-disabled-tests
-  describe.skip('order events by event start ascending', () => {
+  describe('order events by event start ascending', () => {
     it('finds the events ordered accordingly', async () => {
       const {
         data: { Post: result },
@@ -202,15 +200,13 @@ describe('Filter Posts', () => {
         }),
         expect.objectContaining({
           id: 'e1',
-          eventStart: new Date(now.getFullYear(), now.getMonth() + 1).toISOString(),
+          eventStart: new Date(now.getFullYear(), now.getMonth() + 1, 15).toISOString(),
         }),
       ])
     })
   })
 
-  // Does not work on months end
-  // eslint-disable-next-line jest/no-disabled-tests
-  describe.skip('filter events by event start date', () => {
+  describe('filter events by event start date', () => {
     it('finds only events after given date', async () => {
       const {
         data: { Post: result },
@@ -231,7 +227,7 @@ describe('Filter Posts', () => {
       expect(result).toEqual([
         expect.objectContaining({
           id: 'e1',
-          eventStart: new Date(now.getFullYear(), now.getMonth() + 1).toISOString(),
+          eventStart: new Date(now.getFullYear(), now.getMonth() + 1, 15).toISOString(),
         }),
       ])
     })
diff --git a/backend/src/graphql/resolvers/posts.spec.ts b/backend/src/graphql/resolvers/posts.spec.ts
index 452e52754..4bbfcfa1d 100644
--- a/backend/src/graphql/resolvers/posts.spec.ts
+++ b/backend/src/graphql/resolvers/posts.spec.ts
@@ -20,7 +20,6 @@ import unpushPost from '@graphql/queries/posts/unpushPost.gql'
 import UpdatePost from '@graphql/queries/posts/UpdatePost.gql'
 import { createApolloTestSetup } from '@root/test/helpers'
 
-import type Image from '@db/models/Image'
 import type { ApolloTestSetup } from '@root/test/helpers'
 import type { Context } from '@src/context'
 
@@ -885,50 +884,6 @@ describe('UpdatePost', () => {
         })
       })
     })
-
-    // eslint-disable-next-line jest/no-disabled-tests
-    describe.skip('params.image', () => {
-      describe('is object', () => {
-        beforeEach(() => {
-          variables = { ...variables, image: { sensitive: true } }
-        })
-        it('updates the image', async () => {
-          await expect(
-            database.neode.first<typeof Image>('Image', { sensitive: true }, undefined),
-          ).resolves.toBeFalsy()
-          await mutate({ mutation: UpdatePost, variables })
-          await expect(
-            database.neode.first<typeof Image>('Image', { sensitive: true }, undefined),
-          ).resolves.toBeTruthy()
-        })
-      })
-
-      describe('is null', () => {
-        beforeEach(() => {
-          variables = { ...variables, image: null }
-        })
-        it('deletes the image', async () => {
-          await expect(database.neode.all('Image')).resolves.toHaveLength(6)
-          await mutate({ mutation: UpdatePost, variables })
-          await expect(database.neode.all('Image')).resolves.toHaveLength(5)
-        })
-      })
-
-      describe('is undefined', () => {
-        beforeEach(() => {
-          delete variables.image
-        })
-        it('keeps the image unchanged', async () => {
-          await expect(
-            database.neode.first<typeof Image>('Image', { sensitive: true }, undefined),
-          ).resolves.toBeFalsy()
-          await mutate({ mutation: UpdatePost, variables })
-          await expect(
-            database.neode.first<typeof Image>('Image', { sensitive: true }, undefined),
-          ).resolves.toBeFalsy()
-        })
-      })
-    })
   })
 })
 
diff --git a/backend/src/graphql/resolvers/posts.ts b/backend/src/graphql/resolvers/posts.ts
index 5d975f3f8..50ba2e44a 100644
--- a/backend/src/graphql/resolvers/posts.ts
+++ b/backend/src/graphql/resolvers/posts.ts
@@ -219,7 +219,7 @@ export default {
       } catch (e) {
         if (e.code === 'Neo.ClientError.Schema.ConstraintValidationFailed')
           throw new UserInputError('Post with this slug already exists!')
-        throw new Error(e)
+        throw e
       } finally {
         await session.close()
       }
@@ -286,6 +286,10 @@ export default {
           await createOrUpdateLocations('Post', post.id, locationName, session, context)
         }
         return post
+      } catch (e) {
+        if (e.code === 'Neo.ClientError.Schema.ConstraintValidationFailed')
+          throw new UserInputError('Post with this slug already exists!')
+        throw e
       } finally {
         await session.close()
       }
diff --git a/backend/src/graphql/resolvers/reports.spec.ts b/backend/src/graphql/resolvers/reports.spec.ts
index a85810948..2f818cfdf 100644
--- a/backend/src/graphql/resolvers/reports.spec.ts
+++ b/backend/src/graphql/resolvers/reports.spec.ts
@@ -239,7 +239,30 @@ describe('reports', () => {
             })
           })
 
-          it.todo('creates multiple filed reports')
+          it('creates separate reports for different resources', async () => {
+            await Factory.build(
+              'user',
+              {
+                id: 'second-abusive-user-id',
+                role: 'user',
+                name: 'second-abusive-user',
+              },
+              {
+                email: 'second-abusive@example.org',
+              },
+            )
+            const firstReport = await mutate({
+              mutation: fileReport,
+              variables: { ...variables, resourceId: 'abusive-user-id' },
+            })
+            const secondReport = await mutate({
+              mutation: fileReport,
+              variables: { ...variables, resourceId: 'second-abusive-user-id' },
+            })
+            expect(firstReport.data.fileReport.reportId).not.toEqual(
+              secondReport.data.fileReport.reportId,
+            )
+          })
         })
 
         describe('reported resource is a user', () => {
diff --git a/backend/src/middleware/slugifyMiddleware.spec.ts b/backend/src/middleware/slugifyMiddleware.spec.ts
index 809ec46f4..2509dcd5f 100644
--- a/backend/src/middleware/slugifyMiddleware.spec.ts
+++ b/backend/src/middleware/slugifyMiddleware.spec.ts
@@ -7,6 +7,7 @@ import SignupVerification from '@graphql/queries/auth/SignupVerification.gql'
 import CreateGroup from '@graphql/queries/groups/CreateGroup.gql'
 import UpdateGroup from '@graphql/queries/groups/UpdateGroup.gql'
 import CreatePost from '@graphql/queries/posts/CreatePost.gql'
+import UpdatePost from '@graphql/queries/posts/UpdatePost.gql'
 import { createApolloTestSetup } from '@root/test/helpers'
 
 import type { ApolloTestSetup } from '@root/test/helpers'
@@ -424,7 +425,100 @@ describe('slugifyMiddleware', () => {
     })
   })
 
-  it.todo('UpdatePost')
+  describe('UpdatePost', () => {
+    let createPostResult
+
+    beforeEach(async () => {
+      createPostResult = await mutate({
+        mutation: CreatePost,
+        variables: {
+          title: 'I am a brand new post',
+          content: 'Some content',
+          categoryIds,
+        },
+      })
+    })
+
+    describe('if new slug not exists', () => {
+      describe('setting slug explicitly', () => {
+        it('has the new slug', async () => {
+          await expect(
+            mutate({
+              mutation: UpdatePost,
+              variables: {
+                id: createPostResult.data.CreatePost.id,
+                title: 'I am a brand new post',
+                content: 'Some content',
+                slug: 'my-brand-new-post',
+              },
+            }),
+          ).resolves.toMatchObject({
+            data: {
+              UpdatePost: {
+                slug: 'my-brand-new-post',
+              },
+            },
+            errors: undefined,
+          })
+        })
+      })
+    })
+
+    describe('if new slug exists in another post', () => {
+      beforeEach(async () => {
+        await Factory.build(
+          'post',
+          {
+            title: 'Pre-existing post',
+            slug: 'pre-existing-post',
+            content: 'Someone else content',
+          },
+          {
+            categoryIds,
+          },
+        )
+      })
+
+      describe('setting slug explicitly', () => {
+        it('rejects UpdatePost', async () => {
+          try {
+            await expect(
+              mutate({
+                mutation: UpdatePost,
+                variables: {
+                  id: createPostResult.data.CreatePost.id,
+                  title: 'I am a brand new post',
+                  content: 'Some content',
+                  slug: 'pre-existing-post',
+                },
+              }),
+            ).resolves.toMatchObject({
+              errors: [
+                {
+                  message: 'Post with this slug already exists!',
+                },
+              ],
+            })
+          } catch (error) {
+            throw new Error(`
+              ${error}
+
+              Probably your database has no unique constraints!
+
+              To see all constraints go to http://localhost:7474/browser/ and
+              paste the following:
+              \`\`\`
+                CALL db.constraints();
+              \`\`\`
+
+              Learn how to setup the database here:
+              https://github.com/Ocelot-Social-Community/Ocelot-Social/blob/master/backend/README.md#database-indices-and-constraints
+            `)
+          }
+        })
+      })
+    })
+  })
 
   describe('SignupVerification', () => {
     beforeEach(() => {