diff --git a/packages/backend/src/graphql/queries/get-user.test.ts b/packages/backend/src/graphql/queries/get-user.test.ts
index 4c427c7b..071fce5b 100644
--- a/packages/backend/src/graphql/queries/get-user.test.ts
+++ b/packages/backend/src/graphql/queries/get-user.test.ts
@@ -1,10 +1,11 @@
-import request from 'supertest';
+import request, { Test } from 'supertest';
 import app from '../../app';
 import createAuthTokenByUserId from '../../helpers/create-auth-token-by-user-id';
 import Crypto from 'crypto';
 import createRole from '../../../test/fixtures/role';
 import createPermission from '../../../test/fixtures/permission';
 import createUser from '../../../test/fixtures/user';
+import { IRole, IUser } from '@automatisch/types';
 
 describe('getUser', () => {
   describe('with unauthorized user', () => {
@@ -32,11 +33,11 @@ describe('getUser', () => {
   });
 
   describe('with authorized user', () => {
-    let role: any,
-      currentUser: any,
-      anotherUser: any,
-      token: any,
-      requestObject: any;
+    let role: IRole,
+      currentUser: IUser,
+      anotherUser: IUser,
+      token: string,
+      requestObject: Test;
 
     beforeEach(async () => {
       role = await createRole({
@@ -87,12 +88,12 @@ describe('getUser', () => {
       const expectedResponsePayload = {
         data: {
           getUser: {
-            createdAt: anotherUser.created_at.getTime().toString(),
+            createdAt: (anotherUser.createdAt as Date).getTime().toString(),
             email: anotherUser.email,
-            fullName: anotherUser.full_name,
+            fullName: anotherUser.fullName,
             id: anotherUser.id,
             role: { id: role.id, name: role.name },
-            updatedAt: anotherUser.updated_at.getTime().toString(),
+            updatedAt: (anotherUser.updatedAt as Date).getTime().toString(),
           },
         },
       };
diff --git a/packages/backend/test/fixtures/permission.ts b/packages/backend/test/fixtures/permission.ts
index 398dd31a..e5232674 100644
--- a/packages/backend/test/fixtures/permission.ts
+++ b/packages/backend/test/fixtures/permission.ts
@@ -1,3 +1,4 @@
+import { IPermission } from '@automatisch/types';
 import createRole from './role';
 
 type PermissionParams = {
@@ -6,9 +7,11 @@ type PermissionParams = {
   subject?: string;
 };
 
-const createPermission = async (params: PermissionParams = {}) => {
+const createPermission = async (
+  params: PermissionParams = {}
+): Promise<IPermission> => {
   const permissionData = {
-    role_id: params?.roleId || (await createRole()).id,
+    roleId: params?.roleId || (await createRole()).id,
     action: params?.action || 'read',
     subject: params?.subject || 'User',
   };
diff --git a/packages/backend/test/fixtures/role.ts b/packages/backend/test/fixtures/role.ts
index b6124116..dc568c3d 100644
--- a/packages/backend/test/fixtures/role.ts
+++ b/packages/backend/test/fixtures/role.ts
@@ -1,9 +1,11 @@
+import { IRole } from '@automatisch/types';
+
 type RoleParams = {
   name?: string;
   key?: string;
 };
 
-const createRole = async (params: RoleParams = {}) => {
+const createRole = async (params: RoleParams = {}): Promise<IRole> => {
   params.name = params?.name || 'Viewer';
   params.key = params?.key || 'viewer';
 
diff --git a/packages/backend/test/fixtures/user.ts b/packages/backend/test/fixtures/user.ts
index 7bb9bd03..f7aaeab6 100644
--- a/packages/backend/test/fixtures/user.ts
+++ b/packages/backend/test/fixtures/user.ts
@@ -10,8 +10,8 @@ type UserParams = {
 
 const createUser = async (params: UserParams = {}) => {
   const userData = {
-    role_id: params?.roleId || (await createRole()).id,
-    full_name: params?.fullName || faker.person.fullName(),
+    roleId: params?.roleId || (await createRole()).id,
+    fullName: params?.fullName || faker.person.fullName(),
     email: params?.email || faker.internet.email(),
     password: params?.password || faker.internet.password(),
   };
diff --git a/packages/types/index.d.ts b/packages/types/index.d.ts
index 74f49837..228558e3 100644
--- a/packages/types/index.d.ts
+++ b/packages/types/index.d.ts
@@ -99,6 +99,8 @@ export interface IUser {
   steps: IStep[];
   role: IRole;
   permissions: IPermission[];
+  createdAt: string | Date;
+  updatedAt: string | Date;
 }
 
 export interface IRole {