diff --git a/backend/.eslintrc.js b/backend/.eslintrc.js
index 096e4d60a..6ce43ef35 100644
--- a/backend/.eslintrc.js
+++ b/backend/.eslintrc.js
@@ -4,7 +4,7 @@ module.exports = {
     node: true,
   },
   parser: '@typescript-eslint/parser',
-  plugins: ['prettier', '@typescript-eslint', 'type-graphql'],
+  plugins: ['prettier', '@typescript-eslint', 'type-graphql', 'jest'],
   extends: ['standard', 'eslint:recommended', 'plugin:prettier/recommended'],
   // add your custom rules here
   rules: {
@@ -16,11 +16,17 @@ module.exports = {
         htmlWhitespaceSensitivity: 'ignore',
       },
     ],
+    // jest
+    'jest/no-disabled-tests': 'error',
+    'jest/no-focused-tests': 'error',
+    'jest/no-identical-title': 'error',
+    'jest/prefer-to-have-length': 'error',
+    'jest/valid-expect': 'error',
   },
   overrides: [
     // only for ts files
     {
-      files: ['*.ts'],
+      files: ['*.ts', '*.tsx'],
       extends: [
         'plugin:@typescript-eslint/recommended',
         'plugin:@typescript-eslint/recommended-requiring-type-checking',
diff --git a/backend/package.json b/backend/package.json
index 19427091b..47636486f 100644
--- a/backend/package.json
+++ b/backend/package.json
@@ -62,6 +62,7 @@
     "eslint-config-prettier": "^8.3.0",
     "eslint-config-standard": "^16.0.3",
     "eslint-plugin-import": "^2.23.4",
+    "eslint-plugin-jest": "^27.2.1",
     "eslint-plugin-node": "^11.1.0",
     "eslint-plugin-prettier": "^3.4.0",
     "eslint-plugin-promise": "^5.1.0",
diff --git a/backend/src/emails/sendEmailTranslated.test.ts b/backend/src/emails/sendEmailTranslated.test.ts
index f3c75a7a6..73edb79f3 100644
--- a/backend/src/emails/sendEmailTranslated.test.ts
+++ b/backend/src/emails/sendEmailTranslated.test.ts
@@ -102,10 +102,12 @@ describe('sendEmailTranslated', () => {
       })
     })
 
+    // eslint-disable-next-line jest/no-disabled-tests
     it.skip('calls "i18n.setLocale" with "en"', () => {
       expect(i18n.setLocale).toBeCalledWith('en')
     })
 
+    // eslint-disable-next-line jest/no-disabled-tests
     it.skip('calls "i18n.__" for translation', () => {
       expect(i18n.__).toBeCalled()
     })
diff --git a/backend/src/graphql/resolver/ContributionLinkResolver.test.ts b/backend/src/graphql/resolver/ContributionLinkResolver.test.ts
index 77d64ad8a..607fafd65 100644
--- a/backend/src/graphql/resolver/ContributionLinkResolver.test.ts
+++ b/backend/src/graphql/resolver/ContributionLinkResolver.test.ts
@@ -280,7 +280,7 @@ describe('Contribution Links', () => {
           )
         })
 
-        it('logs the error thrown', () => {
+        it('logs the error "A Start-Date must be set"', () => {
           expect(logger.error).toBeCalledWith('A Start-Date must be set')
         })
 
@@ -301,7 +301,7 @@ describe('Contribution Links', () => {
           )
         })
 
-        it('logs the error thrown', () => {
+        it('logs the error "An End-Date must be set"', () => {
           expect(logger.error).toBeCalledWith('An End-Date must be set')
         })
 
@@ -325,7 +325,7 @@ describe('Contribution Links', () => {
           )
         })
 
-        it('logs the error thrown', () => {
+        it('logs the error "The value of validFrom must before or equals the validTo"', () => {
           expect(logger.error).toBeCalledWith(
             `The value of validFrom must before or equals the validTo`,
           )
@@ -348,7 +348,7 @@ describe('Contribution Links', () => {
           )
         })
 
-        it('logs the error thrown', () => {
+        it('logs the error "The value of name is too short"', () => {
           expect(logger.error).toBeCalledWith('The value of name is too short', 3)
         })
 
@@ -369,7 +369,7 @@ describe('Contribution Links', () => {
           )
         })
 
-        it('logs the error thrown', () => {
+        it('logs the error "The value of name is too long"', () => {
           expect(logger.error).toBeCalledWith('The value of name is too long', 101)
         })
 
@@ -390,7 +390,7 @@ describe('Contribution Links', () => {
           )
         })
 
-        it('logs the error thrown', () => {
+        it('logs the error "The value of memo is too short"', () => {
           expect(logger.error).toBeCalledWith('The value of memo is too short', 3)
         })
 
@@ -411,7 +411,7 @@ describe('Contribution Links', () => {
           )
         })
 
-        it('logs the error thrown', () => {
+        it('logs the error "The value of memo is too long"', () => {
           expect(logger.error).toBeCalledWith('The value of memo is too long', 256)
         })
 
@@ -432,7 +432,7 @@ describe('Contribution Links', () => {
           )
         })
 
-        it('logs the error thrown', () => {
+        it('logs the error "The amount must be a positiv value"', () => {
           expect(logger.error).toBeCalledWith('The amount must be a positiv value', new Decimal(0))
         })
       })
@@ -490,7 +490,7 @@ describe('Contribution Links', () => {
           })
         })
 
-        it('logs the error thrown', () => {
+        it('logs the error "Contribution Link not found"', () => {
           expect(logger.error).toBeCalledWith('Contribution Link not found', -1)
         })
 
@@ -572,7 +572,7 @@ describe('Contribution Links', () => {
             )
           })
 
-          it('logs the error thrown', () => {
+          it('logs the error "Contribution Link not found"', () => {
             expect(logger.error).toBeCalledWith('Contribution Link not found', -1)
           })
         })
diff --git a/backend/src/graphql/resolver/ContributionMessageResolver.test.ts b/backend/src/graphql/resolver/ContributionMessageResolver.test.ts
index 3f10adae6..0801bb131 100644
--- a/backend/src/graphql/resolver/ContributionMessageResolver.test.ts
+++ b/backend/src/graphql/resolver/ContributionMessageResolver.test.ts
@@ -115,7 +115,7 @@ describe('ContributionMessageResolver', () => {
           )
         })
 
-        it('logs the error thrown', () => {
+        it('logs the error "ContributionMessage was not sent successfully: Error: Contribution not found"', () => {
           expect(logger.error).toBeCalledWith(
             'ContributionMessage was not sent successfully: Error: Contribution not found',
             new Error('Contribution not found'),
@@ -155,7 +155,7 @@ describe('ContributionMessageResolver', () => {
           )
         })
 
-        it('logs the error thrown', () => {
+        it('logs the error "ContributionMessage was not sent successfully: Error: Admin can not answer on his own contribution"', () => {
           expect(logger.error).toBeCalledWith(
             'ContributionMessage was not sent successfully: Error: Admin can not answer on his own contribution',
             new Error('Admin can not answer on his own contribution'),
@@ -265,7 +265,7 @@ describe('ContributionMessageResolver', () => {
           )
         })
 
-        it('logs the error thrown', () => {
+        it('logs the error "ContributionMessage was not sent successfully: Error: Contribution not found"', () => {
           expect(logger.error).toBeCalledWith(
             'ContributionMessage was not sent successfully: Error: Contribution not found',
             new Error('Contribution not found'),
@@ -297,7 +297,7 @@ describe('ContributionMessageResolver', () => {
           )
         })
 
-        it('logs the error thrown', () => {
+        it('logs the error "ContributionMessage was not sent successfully: Error: Can not send message to contribution of another user"', () => {
           expect(logger.error).toBeCalledWith(
             'ContributionMessage was not sent successfully: Error: Can not send message to contribution of another user',
             new Error('Can not send message to contribution of another user'),
diff --git a/backend/src/graphql/resolver/ContributionResolver.test.ts b/backend/src/graphql/resolver/ContributionResolver.test.ts
index ceb062e8c..8c753ae55 100644
--- a/backend/src/graphql/resolver/ContributionResolver.test.ts
+++ b/backend/src/graphql/resolver/ContributionResolver.test.ts
@@ -201,7 +201,7 @@ describe('ContributionResolver', () => {
           expect(errorObjects).toEqual([new GraphQLError('Memo text is too short')])
         })
 
-        it('logs the error found', () => {
+        it('logs the error "Memo text is too short"', () => {
           expect(logger.error).toBeCalledWith('Memo text is too short', 4)
         })
 
@@ -219,7 +219,7 @@ describe('ContributionResolver', () => {
           expect(errorObjects).toEqual([new GraphQLError('Memo text is too long')])
         })
 
-        it('logs the error found', () => {
+        it('logs the error "Memo text is too long"', () => {
           expect(logger.error).toBeCalledWith('Memo text is too long', 259)
         })
 
@@ -238,7 +238,7 @@ describe('ContributionResolver', () => {
           ])
         })
 
-        it('logs the error found', () => {
+        it('logs the error "No information for available creations for the given date"', () => {
           expect(logger.error).toBeCalledWith(
             'No information for available creations for the given date',
             expect.any(Date),
@@ -261,7 +261,7 @@ describe('ContributionResolver', () => {
           ])
         })
 
-        it('logs the error found', () => {
+        it('logs the error "No information for available creations for the given date" again', () => {
           expect(logger.error).toBeCalledWith(
             'No information for available creations for the given date',
             expect.any(Date),
@@ -337,7 +337,7 @@ describe('ContributionResolver', () => {
           expect(errorObjects).toEqual([new GraphQLError('Memo text is too short')])
         })
 
-        it('logs the error found', () => {
+        it('logs the error "Memo text is too short"', () => {
           expect(logger.error).toBeCalledWith('Memo text is too short', 4)
         })
       })
@@ -358,7 +358,7 @@ describe('ContributionResolver', () => {
           expect(errorObjects).toEqual([new GraphQLError('Memo text is too long')])
         })
 
-        it('logs the error found', () => {
+        it('logs the error "Memo text is too long"', () => {
           expect(logger.error).toBeCalledWith('Memo text is too long', 259)
         })
       })
@@ -383,7 +383,7 @@ describe('ContributionResolver', () => {
           )
         })
 
-        it('logs the error found', () => {
+        it('logs the error "Contribution not found"', () => {
           expect(logger.error).toBeCalledWith('Contribution not found', -1)
         })
       })
@@ -412,7 +412,7 @@ describe('ContributionResolver', () => {
           ])
         })
 
-        it('logs the error found', () => {
+        it('logs the error "Can not update contribution of another user"', () => {
           expect(logger.error).toBeCalledWith(
             'Can not update contribution of another user',
             expect.any(Object),
@@ -446,7 +446,7 @@ describe('ContributionResolver', () => {
           ])
         })
 
-        it('logs the error found', () => {
+        it('logs the error "An admin is not allowed to update an user contribution"', () => {
           expect(logger.error).toBeCalledWith(
             'An admin is not allowed to update an user contribution',
           )
@@ -492,7 +492,7 @@ describe('ContributionResolver', () => {
             )
           })
 
-          it('logs the error found', () => {
+          it('logs the error "Contribution can not be updated due to status"', () => {
             expect(logger.error).toBeCalledWith(
               'Contribution can not be updated due to status',
               ContributionStatus.DELETED,
@@ -527,7 +527,7 @@ describe('ContributionResolver', () => {
           ])
         })
 
-        it('logs the error found', () => {
+        it('logs the error "The amount to be created exceeds the amount still available for this month"', () => {
           expect(logger.error).toBeCalledWith(
             'The amount to be created exceeds the amount still available for this month',
             new Decimal(1019),
@@ -554,7 +554,7 @@ describe('ContributionResolver', () => {
           ])
         })
 
-        it('logs the error found', () => {
+        it('logs the error "Month of contribution can not be changed"', () => {
           expect(logger.error).toBeCalledWith('Month of contribution can not be changed')
         })
       })
@@ -659,7 +659,7 @@ describe('ContributionResolver', () => {
           expect(errorObjects).toEqual([new GraphQLError('Contribution not found')])
         })
 
-        it('logs the error found', () => {
+        it('logs the error "Contribution not found"', () => {
           expect(logger.error).toBeCalledWith('Contribution not found', -1)
         })
       })
@@ -703,7 +703,7 @@ describe('ContributionResolver', () => {
           expect(errorObjects).toEqual([new GraphQLError('Contribution not found')])
         })
 
-        it('logs the error found', () => {
+        it('logs the error "Contribution not found"', () => {
           expect(logger.error).toBeCalledWith('Contribution not found', expect.any(Number))
         })
       })
@@ -748,7 +748,7 @@ describe('ContributionResolver', () => {
           expect(errorObjects).toEqual([new GraphQLError('Contribution not found')])
         })
 
-        it('logs the error found', () => {
+        it('logs the error "Contribution not found"', () => {
           expect(logger.error).toBeCalledWith(`Contribution not found`, expect.any(Number))
         })
       })
@@ -793,7 +793,7 @@ describe('ContributionResolver', () => {
           expect(errorObjects).toEqual([new GraphQLError('Contribution not found')])
         })
 
-        it('logs the error found', () => {
+        it('logs the error "Contribution not found"', () => {
           expect(logger.error).toBeCalledWith(`Contribution not found`, expect.any(Number))
         })
       })
@@ -879,7 +879,7 @@ describe('ContributionResolver', () => {
           expect(errorObjects).toEqual([new GraphQLError('Contribution not found')])
         })
 
-        it('logs the error found', () => {
+        it('logs the error "Contribution not found"', () => {
           expect(logger.error).toBeCalledWith('Contribution not found', expect.any(Number))
         })
       })
@@ -909,7 +909,7 @@ describe('ContributionResolver', () => {
           ])
         })
 
-        it('logs the error found', () => {
+        it('logs the error "Can not delete contribution of another user"', () => {
           expect(logger.error).toBeCalledWith(
             'Can not delete contribution of another user',
             expect.any(Contribution),
@@ -984,7 +984,7 @@ describe('ContributionResolver', () => {
           ])
         })
 
-        it('logs the error found', () => {
+        it('logs the error "A confirmed contribution can not be deleted"', () => {
           expect(logger.error).toBeCalledWith(
             'A confirmed contribution can not be deleted',
             expect.objectContaining({ contributionStatus: 'CONFIRMED' }),
@@ -1849,7 +1849,7 @@ describe('ContributionResolver', () => {
               )
             })
 
-            it('logs the error thrown', () => {
+            it('logs the error "Could not find user"', () => {
               expect(logger.error).toBeCalledWith('Could not find user', 'some@fake.email')
             })
           })
@@ -1876,7 +1876,7 @@ describe('ContributionResolver', () => {
               )
             })
 
-            it('logs the error thrown', () => {
+            it('logs the error "Cannot create contribution since the user was deleted"', () => {
               expect(logger.error).toBeCalledWith(
                 'Cannot create contribution since the user was deleted',
                 expect.objectContaining({
@@ -1912,7 +1912,7 @@ describe('ContributionResolver', () => {
               )
             })
 
-            it('logs the error thrown', () => {
+            it('logs the error "Cannot create contribution since the users email is not activated"', () => {
               expect(logger.error).toBeCalledWith(
                 'Cannot create contribution since the users email is not activated',
                 expect.objectContaining({ emailChecked: false }),
@@ -1938,7 +1938,7 @@ describe('ContributionResolver', () => {
                 )
               })
 
-              it('logs the error thrown', () => {
+              it('logs the error "CreationDate is invalid"', () => {
                 expect(logger.error).toBeCalledWith('CreationDate is invalid', 'invalid-date')
               })
             })
@@ -1960,7 +1960,7 @@ describe('ContributionResolver', () => {
                 )
               })
 
-              it('logs the error thrown', () => {
+              it('logs the error "No information for available creations for the given date"', () => {
                 expect(logger.error).toBeCalledWith(
                   'No information for available creations for the given date',
                   new Date(variables.creationDate),
@@ -1985,7 +1985,7 @@ describe('ContributionResolver', () => {
                 )
               })
 
-              it('logs the error thrown', () => {
+              it('logs the error "No information for available creations for the given date"', () => {
                 expect(logger.error).toBeCalledWith(
                   'No information for available creations for the given date',
                   new Date(variables.creationDate),
@@ -2010,7 +2010,7 @@ describe('ContributionResolver', () => {
                 )
               })
 
-              it('logs the error thrown', () => {
+              it('logs the error "The amount to be created exceeds the amount still available for this month"', () => {
                 expect(logger.error).toBeCalledWith(
                   'The amount to be created exceeds the amount still available for this month',
                   new Decimal(2000),
@@ -2062,7 +2062,7 @@ describe('ContributionResolver', () => {
                 )
               })
 
-              it('logs the error thrown', () => {
+              it('logs the error "The amount to be created exceeds the amount still available for this month"', () => {
                 expect(logger.error).toBeCalledWith(
                   'The amount to be created exceeds the amount still available for this month',
                   new Decimal(1000),
@@ -2101,7 +2101,7 @@ describe('ContributionResolver', () => {
               )
             })
 
-            it('logs the error thrown', () => {
+            it('logs the error "Could not find User"', () => {
               expect(logger.error).toBeCalledWith('Could not find User', 'bob@baumeister.de')
             })
           })
@@ -2127,7 +2127,7 @@ describe('ContributionResolver', () => {
               )
             })
 
-            it('logs the error thrown', () => {
+            it('logs the error "User was deleted"', () => {
               expect(logger.error).toBeCalledWith('User was deleted', 'stephen@hawking.uk')
             })
           })
@@ -2153,7 +2153,7 @@ describe('ContributionResolver', () => {
               )
             })
 
-            it('logs the error thrown', () => {
+            it('logs the error "Contribution not found"', () => {
               expect(logger.error).toBeCalledWith('Contribution not found', -1)
             })
           })
@@ -2185,7 +2185,7 @@ describe('ContributionResolver', () => {
               )
             })
 
-            it('logs the error thrown', () => {
+            it('logs the error "User of the pending contribution and send user does not correspond"', () => {
               expect(logger.error).toBeCalledWith(
                 'User of the pending contribution and send user does not correspond',
               )
@@ -2220,7 +2220,7 @@ describe('ContributionResolver', () => {
               )
             })
 
-            it('logs the error thrown', () => {
+            it('logs the error "The amount to be created exceeds the amount still available for this month"', () => {
               expect(logger.error).toBeCalledWith(
                 'The amount to be created exceeds the amount still available for this month',
                 new Decimal(1900),
@@ -2229,6 +2229,7 @@ describe('ContributionResolver', () => {
             })
           })
 
+          // eslint-disable-next-line jest/no-disabled-tests
           describe.skip('creation update is successful changing month', () => {
             // skipped as changing the month is currently disable
             it('returns update creation object', async () => {
@@ -2332,7 +2333,7 @@ describe('ContributionResolver', () => {
               )
             })
 
-            it('logs the error thrown', () => {
+            it('logs the error "Contribution not found"', () => {
               expect(logger.error).toBeCalledWith('Contribution not found', -1)
             })
           })
@@ -2474,7 +2475,7 @@ describe('ContributionResolver', () => {
               )
             })
 
-            it('logs the error thrown', () => {
+            it('logs the error "Contribution not found"', () => {
               expect(logger.error).toBeCalledWith('Contribution not found', -1)
             })
           })
@@ -2508,7 +2509,7 @@ describe('ContributionResolver', () => {
               )
             })
 
-            it('logs the error thrown', () => {
+            it('logs the error "Moderator can not confirm own contribution"', () => {
               expect(logger.error).toBeCalledWith('Moderator can not confirm own contribution')
             })
           })
@@ -2603,7 +2604,7 @@ describe('ContributionResolver', () => {
               })
             })
 
-            it('logs the error thrown', () => {
+            it('logs the error "Contribution already confirmed"', () => {
               expect(logger.error).toBeCalledWith(
                 'Contribution already confirmed',
                 expect.any(Number),
diff --git a/backend/src/graphql/resolver/TransactionLinkResolver.test.ts b/backend/src/graphql/resolver/TransactionLinkResolver.test.ts
index e1c73b98c..d86f260fe 100644
--- a/backend/src/graphql/resolver/TransactionLinkResolver.test.ts
+++ b/backend/src/graphql/resolver/TransactionLinkResolver.test.ts
@@ -99,7 +99,7 @@ describe('TransactionLinkResolver', () => {
           errors: [new GraphQLError('Amount must be a positive number')],
         })
       })
-      it('logs the error thrown', () => {
+      it('logs the error "Amount must be a positive number" - 0', () => {
         expect(logger.error).toBeCalledWith('Amount must be a positive number', new Decimal(0))
       })
 
@@ -117,7 +117,7 @@ describe('TransactionLinkResolver', () => {
           errors: [new GraphQLError('Amount must be a positive number')],
         })
       })
-      it('logs the error thrown', () => {
+      it('logs the error "Amount must be a positive number" - -10', () => {
         expect(logger.error).toBeCalledWith('Amount must be a positive number', new Decimal(-10))
       })
 
@@ -135,7 +135,7 @@ describe('TransactionLinkResolver', () => {
           errors: [new GraphQLError('User has not enough GDD')],
         })
       })
-      it('logs the error thrown', () => {
+      it('logs the error "User has not enough GDD"', () => {
         expect(logger.error).toBeCalledWith('User has not enough GDD', expect.any(Number))
       })
     })
@@ -187,7 +187,7 @@ describe('TransactionLinkResolver', () => {
             })
           })
 
-          it('logs the error thrown', () => {
+          it('logs the error "No contribution link found to given code"', () => {
             expect(logger.error).toBeCalledWith(
               'No contribution link found to given code',
               'CL-123456',
@@ -231,7 +231,7 @@ describe('TransactionLinkResolver', () => {
             await resetEntity(DbContributionLink)
           })
 
-          it('logs the error thrown', () => {
+          it('logs the error "Contribution link is not valid yet"', () => {
             expect(logger.error).toBeCalledWith('Contribution link is not valid yet', validFrom)
             expect(logger.error).toBeCalledWith(
               'Creation from contribution link was not successful',
@@ -270,7 +270,7 @@ describe('TransactionLinkResolver', () => {
             await resetEntity(DbContributionLink)
           })
 
-          it('logs the error thrown', () => {
+          it('logs the error "Contribution link has unknown cycle"', () => {
             expect(logger.error).toBeCalledWith('Contribution link has unknown cycle', 'INVALID')
             expect(logger.error).toBeCalledWith(
               'Creation from contribution link was not successful',
@@ -309,7 +309,7 @@ describe('TransactionLinkResolver', () => {
             await resetEntity(DbContributionLink)
           })
 
-          it('logs the error thrown', () => {
+          it('logs the error "Contribution link is no longer valid"', () => {
             expect(logger.error).toBeCalledWith('Contribution link is no longer valid', validTo)
             expect(logger.error).toBeCalledWith(
               'Creation from contribution link was not successful',
@@ -405,7 +405,7 @@ describe('TransactionLinkResolver', () => {
               })
             })
 
-            it('logs the error thrown', () => {
+            it('logs the error "Creation from contribution link was not successful"', () => {
               expect(logger.error).toBeCalledWith(
                 'Creation from contribution link was not successful',
                 new Error(
@@ -480,7 +480,7 @@ describe('TransactionLinkResolver', () => {
               })
             })
 
-            it('logs the error thrown', () => {
+            it('logs the error "Creation from contribution link was not successful"', () => {
               expect(logger.error).toBeCalledWith(
                 'Creation from contribution link was not successful',
                 new Error('Contribution link already redeemed today'),
@@ -532,7 +532,7 @@ describe('TransactionLinkResolver', () => {
                 })
               })
 
-              it('logs the error thrown', () => {
+              it('logs the error "Creation from contribution link was not successful"', () => {
                 expect(logger.error).toBeCalledWith(
                   'Creation from contribution link was not successful',
                   new Error('Contribution link already redeemed today'),
@@ -735,7 +735,7 @@ describe('TransactionLinkResolver', () => {
             })
           })
 
-          it('logs the error thrown', () => {
+          it('logs the error "Could not find requested User"', () => {
             expect(logger.error).toBeCalledWith('Could not find requested User', -1)
           })
         })
@@ -874,6 +874,7 @@ describe('TransactionLinkResolver', () => {
         })
 
         // TODO: works not as expected, because 'redeemedAt' and 'redeemedBy' have to be added to the transaktion link factory
+        // eslint-disable-next-line jest/no-disabled-tests
         describe.skip('filter by redeemed', () => {
           it('finds 6 open transaction links, 1 deleted, and no redeemed', async () => {
             await expect(
diff --git a/backend/src/graphql/resolver/UserResolver.test.ts b/backend/src/graphql/resolver/UserResolver.test.ts
index 3c01089dc..11b0169ef 100644
--- a/backend/src/graphql/resolver/UserResolver.test.ts
+++ b/backend/src/graphql/resolver/UserResolver.test.ts
@@ -797,6 +797,7 @@ describe('UserResolver', () => {
       })
     })
 
+    // eslint-disable-next-line jest/no-disabled-tests
     describe.skip('user is in database but password is not set', () => {
       beforeAll(async () => {
         jest.clearAllMocks()
diff --git a/backend/src/graphql/resolver/semaphore.test.ts b/backend/src/graphql/resolver/semaphore.test.ts
index b3c99ba7d..716d077ac 100644
--- a/backend/src/graphql/resolver/semaphore.test.ts
+++ b/backend/src/graphql/resolver/semaphore.test.ts
@@ -5,8 +5,6 @@
 /* eslint-disable @typescript-eslint/no-explicit-any */
 
 import Decimal from 'decimal.js-light'
-// eslint-disable-next-line @typescript-eslint/no-unused-vars
-import { logger } from '@test/testSetup'
 import { userFactory } from '@/seeds/factory/user'
 import { bibiBloxberg } from '@/seeds/users/bibi-bloxberg'
 import { bobBaumeister } from '@/seeds/users/bob-baumeister'
diff --git a/backend/src/util/decay.test.ts b/backend/src/util/decay.test.ts
index cf00ec851..0e7b02f56 100644
--- a/backend/src/util/decay.test.ts
+++ b/backend/src/util/decay.test.ts
@@ -16,6 +16,7 @@ describe('utils/decay', () => {
       expect(decayFormula(amount, seconds).toString()).toBe('1.000000021964959992727444')
     })
     // we get pretty close, but not exact here, skipping
+    // eslint-disable-next-line jest/no-disabled-tests
     it.skip('has correct forward calculation', () => {
       const amount = new Decimal(1.0).div(
         new Decimal('0.99999997803504048973201202316767079413460520837376'),
diff --git a/backend/yarn.lock b/backend/yarn.lock
index e169a9ce7..2e5487de4 100644
--- a/backend/yarn.lock
+++ b/backend/yarn.lock
@@ -1239,6 +1239,14 @@
     "@typescript-eslint/types" "5.53.0"
     "@typescript-eslint/visitor-keys" "5.53.0"
 
+"@typescript-eslint/scope-manager@5.54.1":
+  version "5.54.1"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/scope-manager/-/scope-manager-5.54.1.tgz#6d864b4915741c608a58ce9912edf5a02bb58735"
+  integrity sha512-zWKuGliXxvuxyM71UA/EcPxaviw39dB2504LqAmFDjmkpO8qNLHcmzlh6pbHs1h/7YQ9bnsO8CCcYCSA8sykUg==
+  dependencies:
+    "@typescript-eslint/types" "5.54.1"
+    "@typescript-eslint/visitor-keys" "5.54.1"
+
 "@typescript-eslint/types@4.33.0":
   version "4.33.0"
   resolved "https://registry.yarnpkg.com/@typescript-eslint/types/-/types-4.33.0.tgz#a1e59036a3b53ae8430ceebf2a919dc7f9af6d72"
@@ -1249,6 +1257,11 @@
   resolved "https://registry.yarnpkg.com/@typescript-eslint/types/-/types-5.53.0.tgz#f79eca62b97e518ee124086a21a24f3be267026f"
   integrity sha512-5kcDL9ZUIP756K6+QOAfPkigJmCPHcLN7Zjdz76lQWWDdzfOhZDTj1irs6gPBKiXx5/6O3L0+AvupAut3z7D2A==
 
+"@typescript-eslint/types@5.54.1":
+  version "5.54.1"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/types/-/types-5.54.1.tgz#29fbac29a716d0f08c62fe5de70c9b6735de215c"
+  integrity sha512-G9+1vVazrfAfbtmCapJX8jRo2E4MDXxgm/IMOF4oGh3kq7XuK3JRkOg6y2Qu1VsTRmWETyTkWt1wxy7X7/yLkw==
+
 "@typescript-eslint/typescript-estree@4.33.0":
   version "4.33.0"
   resolved "https://registry.yarnpkg.com/@typescript-eslint/typescript-estree/-/typescript-estree-4.33.0.tgz#0dfb51c2908f68c5c08d82aefeaf166a17c24609"
@@ -1275,6 +1288,19 @@
     semver "^7.3.7"
     tsutils "^3.21.0"
 
+"@typescript-eslint/typescript-estree@5.54.1":
+  version "5.54.1"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/typescript-estree/-/typescript-estree-5.54.1.tgz#df7b6ae05fd8fef724a87afa7e2f57fa4a599be1"
+  integrity sha512-bjK5t+S6ffHnVwA0qRPTZrxKSaFYocwFIkZx5k7pvWfsB1I57pO/0M0Skatzzw1sCkjJ83AfGTL0oFIFiDX3bg==
+  dependencies:
+    "@typescript-eslint/types" "5.54.1"
+    "@typescript-eslint/visitor-keys" "5.54.1"
+    debug "^4.3.4"
+    globby "^11.1.0"
+    is-glob "^4.0.3"
+    semver "^7.3.7"
+    tsutils "^3.21.0"
+
 "@typescript-eslint/utils@5.53.0":
   version "5.53.0"
   resolved "https://registry.yarnpkg.com/@typescript-eslint/utils/-/utils-5.53.0.tgz#e55eaad9d6fffa120575ffaa530c7e802f13bce8"
@@ -1289,6 +1315,20 @@
     eslint-utils "^3.0.0"
     semver "^7.3.7"
 
+"@typescript-eslint/utils@^5.10.0":
+  version "5.54.1"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/utils/-/utils-5.54.1.tgz#7a3ee47409285387b9d4609ea7e1020d1797ec34"
+  integrity sha512-IY5dyQM8XD1zfDe5X8jegX6r2EVU5o/WJnLu/znLPWCBF7KNGC+adacXnt5jEYS9JixDcoccI6CvE4RCjHMzCQ==
+  dependencies:
+    "@types/json-schema" "^7.0.9"
+    "@types/semver" "^7.3.12"
+    "@typescript-eslint/scope-manager" "5.54.1"
+    "@typescript-eslint/types" "5.54.1"
+    "@typescript-eslint/typescript-estree" "5.54.1"
+    eslint-scope "^5.1.1"
+    eslint-utils "^3.0.0"
+    semver "^7.3.7"
+
 "@typescript-eslint/visitor-keys@4.33.0":
   version "4.33.0"
   resolved "https://registry.yarnpkg.com/@typescript-eslint/visitor-keys/-/visitor-keys-4.33.0.tgz#2a22f77a41604289b7a186586e9ec48ca92ef1dd"
@@ -1305,6 +1345,14 @@
     "@typescript-eslint/types" "5.53.0"
     eslint-visitor-keys "^3.3.0"
 
+"@typescript-eslint/visitor-keys@5.54.1":
+  version "5.54.1"
+  resolved "https://registry.yarnpkg.com/@typescript-eslint/visitor-keys/-/visitor-keys-5.54.1.tgz#d7a8a0f7181d6ac748f4d47b2306e0513b98bf8b"
+  integrity sha512-q8iSoHTgwCfgcRJ2l2x+xCbu8nBlRAlsQ33k24Adj8eoVBE0f8dUeI+bAa8F84Mv05UGbAx57g2zrRsYIooqQg==
+  dependencies:
+    "@typescript-eslint/types" "5.54.1"
+    eslint-visitor-keys "^3.3.0"
+
 "@wry/equality@^0.1.2":
   version "0.1.11"
   resolved "https://registry.yarnpkg.com/@wry/equality/-/equality-0.1.11.tgz#35cb156e4a96695aa81a9ecc4d03787bc17f1790"
@@ -2714,6 +2762,13 @@ eslint-plugin-import@^2.23.4:
     resolve "^1.20.0"
     tsconfig-paths "^3.11.0"
 
+eslint-plugin-jest@^27.2.1:
+  version "27.2.1"
+  resolved "https://registry.yarnpkg.com/eslint-plugin-jest/-/eslint-plugin-jest-27.2.1.tgz#b85b4adf41c682ea29f1f01c8b11ccc39b5c672c"
+  integrity sha512-l067Uxx7ZT8cO9NJuf+eJHvt6bqJyz2Z29wykyEdz/OtmcELQl2MQGQLX8J94O1cSJWAwUSEvCjwjA7KEK3Hmg==
+  dependencies:
+    "@typescript-eslint/utils" "^5.10.0"
+
 eslint-plugin-node@^11.1.0:
   version "11.1.0"
   resolved "https://registry.yarnpkg.com/eslint-plugin-node/-/eslint-plugin-node-11.1.0.tgz#c95544416ee4ada26740a30474eefc5402dc671d"