diff --git a/client/src/components/layout/Layout.tsx b/client/src/components/layout/Layout.tsx
index 8cdf1fb..cd9ac96 100644
--- a/client/src/components/layout/Layout.tsx
+++ b/client/src/components/layout/Layout.tsx
@@ -1,13 +1,26 @@
-import { Outlet } from 'react-router';
+import { Outlet, useLocation } from 'react-router';
+import { useEffect } from 'react';
 import Header from './Header';
 import { BottomNav } from './BottomNav';
 import { MotionConfig } from 'motion/react';
 
+// starter øverst på siden når man går til en ny side
+function ScrollToTop() {
+  const { pathname } = useLocation();
+
+  useEffect(() => {
+    window.scrollTo(0, 0);
+  }, [pathname]);
+
+  return null;
+}
+
 // felles ramme for alle sider
 export default function Layout() {
   return (
     // gir mulighet for bruker å skru av animasjoner
     <MotionConfig reducedMotion="user">
+      <ScrollToTop />
       <div className="min-h-screen bg-background text-text">
         <Header />
         {/* ekstra plass nederst på mobil så bunnmenyen ikke dekker innholdet */}
diff --git a/client/src/components/layout/UserLink.tsx b/client/src/components/layout/UserLink.tsx
index fcc5f0e..ebcc1db 100644
--- a/client/src/components/layout/UserLink.tsx
+++ b/client/src/components/layout/UserLink.tsx
@@ -3,6 +3,12 @@ import PersonOutlinedIcon from '@mui/icons-material/PersonOutlined';
 import PersonIcon from '@mui/icons-material/Person';
 import { useCurrentUser } from '../../lib/useCurrentUser';
 
+// glir til toppen men hopper rett opp hvis animasjoner er skrudd av
+function scrollToTop() {
+  const reduce = window.matchMedia('(prefers-reduced-motion: reduce)').matches;
+  window.scrollTo({ top: 0, behavior: reduce ? 'auto' : 'smooth' });
+}
+
 // brukerikonet går til min side eller til innlogging
 export function UserLink() {
   const { user } = useCurrentUser();
@@ -11,6 +17,7 @@ export function UserLink() {
     <NavLink
       to={user ? '/profile' : '/login'}
       aria-label={user ? 'Min side' : 'Logg inn'}
+      onClick={scrollToTop}
       className={({ isActive }) =>
         `flex text-4xl transition-colors focus-visible:outline-2 focus-visible:outline-offset-4 focus-visible:outline-pink-light ${
           isActive ? 'text-primary' : 'text-primary/80 hover:text-primary'
diff --git a/client/src/lib/AuthProvider.tsx b/client/src/lib/AuthProvider.tsx
index bf4d844..4bf606e 100644
--- a/client/src/lib/AuthProvider.tsx
+++ b/client/src/lib/AuthProvider.tsx
@@ -1,6 +1,6 @@
 import { type ReactNode } from 'react';
 import { CombinedGraphQLErrors } from '@apollo/client';
-import { useMutation, useQuery } from '@apollo/client/react';
+import { useMutation, useQuery, useApolloClient } from '@apollo/client/react';
 import type { User } from '../types/user';
 import { AuthContext } from './authContext';
 import {
@@ -23,7 +23,9 @@ type AuthProviderProps = { children: ReactNode };
 
 export function AuthProvider({ children }: AuthProviderProps) {
   // spør serveren hvem som er logget inn
-  const { data, loading, refetch } = useQuery(ME);
+  const { data, loading } = useQuery(ME);
+  // tømmer cachen når bruker byttes
+  const client = useApolloClient();
   const [loginMutation] = useMutation(LOGIN);
   const [registerMutation] = useMutation(REGISTER);
   const [logoutMutation] = useMutation(LOGOUT);
@@ -38,7 +40,7 @@ export function AuthProvider({ children }: AuthProviderProps) {
   const continueAsGuest = async () => {
     try {
       await guestMutation();
-      await refetch();
+      await client.resetStore();
       return null;
     } catch (error) {
       return getErrorMessage(error);
@@ -49,7 +51,7 @@ export function AuthProvider({ children }: AuthProviderProps) {
   const login = async (username: string, password: string) => {
     try {
       await loginMutation({ variables: { username, password } });
-      await refetch();
+      await client.resetStore();
       return null;
     } catch (error) {
       return getErrorMessage(error);
@@ -60,7 +62,7 @@ export function AuthProvider({ children }: AuthProviderProps) {
   const register = async (username: string, password: string) => {
     try {
       await registerMutation({ variables: { username, password } });
-      await refetch();
+      await client.resetStore();
       return null;
     } catch (error) {
       return getErrorMessage(error);
@@ -69,7 +71,7 @@ export function AuthProvider({ children }: AuthProviderProps) {
 
   const logout = async () => {
     await logoutMutation();
-    await refetch();
+    await client.resetStore();
   };
 
   return (
diff --git a/client/src/routes/ProfilePage.tsx b/client/src/routes/ProfilePage.tsx
index 047d777..fdbbbe0 100644
--- a/client/src/routes/ProfilePage.tsx
+++ b/client/src/routes/ProfilePage.tsx
@@ -241,8 +241,9 @@ export default function ProfilePage() {
       </div>
 
       {/* oppskriftsfanene */}
+      {/* minstehøyde så siden ikke krymper og kaster deg opp når fanen byttes */}
       <div
-        className={`${activeTab === 'preferences' ? 'hidden' : 'block'} md:block`}
+        className={`${activeTab === 'preferences' ? 'hidden' : 'block'} min-h-screen md:block`}
       >
         <div
           role="tablist"
diff --git a/server/src/schema/resolvers/user.ts b/server/src/schema/resolvers/user.ts
index b508a2c..203d9d1 100644
--- a/server/src/schema/resolvers/user.ts
+++ b/server/src/schema/resolvers/user.ts
@@ -70,6 +70,22 @@ async function findOwnRecipe(id: string, userId: string) {
   return recipe;
 }
 
+// testbrukeren deles av alle som tester så den skal ikke kunne endres passord eller navn
+const TEST_USERNAME = 'test';
+
+// stopper endringer på den delte testbrukeren
+async function blockTestUser(userId: string) {
+  const user = await prisma.user.findUnique({ where: { id: userId } });
+  if (user?.username === TEST_USERNAME) {
+    throw new GraphQLError(
+      'Testbrukeren kan ikke endres, lag en egen bruker hvis du ønsker å teste funksjonen.',
+      {
+        extensions: { code: 'FORBIDDEN' },
+      },
+    );
+  }
+}
+
 // bytter ut alt innhold i en oppskrift
 async function replaceRecipe(
   id: string,
@@ -304,6 +320,7 @@ export const userResolvers = {
           extensions: { code: 'UNAUTHENTICATED' },
         });
       }
+      await blockTestUser(context.userId);
 
       // fjerner mellomrom før og etter navnet
       const name = args.name.trim();
@@ -330,6 +347,7 @@ export const userResolvers = {
           extensions: { code: 'UNAUTHENTICATED' },
         });
       }
+      await blockTestUser(context.userId);
 
       const user = await prisma.user.findUnique({
         where: { id: context.userId },