diff --git a/backend/src/tools/schocken/routes.js b/backend/src/tools/schocken/routes.js
index d5a2719..ecb00a9 100644
--- a/backend/src/tools/schocken/routes.js
+++ b/backend/src/tools/schocken/routes.js
@@ -102,7 +102,15 @@ function sendPush(userId, title, message) {
   }).catch(() => {});
 }
 
-const uid = req => req.user.id;
+const uid = req => {
+  // Testmodus: Admin kann als anderen User agieren
+  const testAs = req.headers['x-schocken-test-as'];
+  if (testAs && req.user?.role === 'admin') {
+    const testId = parseInt(testAs);
+    if (!isNaN(testId)) return testId;
+  }
+  return req.user.id;
+};
 
 // ── Alle Spiele des Users ─────────────────────────────────────────────────────
 router.get('/', authenticate, (req, res) => {
diff --git a/frontend/src/tools/schocken.jsx b/frontend/src/tools/schocken.jsx
index 15508c5..78e4275 100644
--- a/frontend/src/tools/schocken.jsx
+++ b/frontend/src/tools/schocken.jsx
@@ -1,6 +1,20 @@
 import { useState, useEffect, useCallback } from 'react';
 import { api, S } from '../lib.js';
 
+// Testmodus: API-Call als anderer User (nur Admin, nur Schocken)
+async function apiAs(userId, path, opts = {}) {
+  const token = localStorage.getItem('sk_token');
+  const headers = { 'Content-Type': 'application/json', Authorization: `Bearer ${token}` };
+  if (userId) headers['X-Schocken-Test-As'] = String(userId);
+  const res = await fetch(`/api${path}`, {
+    method: opts.method || (opts.body ? 'POST' : 'GET'),
+    headers,
+    body: opts.body ? JSON.stringify(opts.body) : undefined,
+  });
+  if (!res.ok) { const e = await res.json().catch(()=>({error:'Fehler'})); throw new Error(e.error||'Fehler'); }
+  return res.json();
+}
+
 const MY_COLOR = '#4ecdc4';
 
 function getMyId() {
@@ -441,7 +455,7 @@ function GameList({ games, myId, onSelect, onNew }) {
 }
 
 // ── Spielansicht ──────────────────────────────────────────────────────────────
-function GameView({ game, myId, onRefresh, toast }) {
+function GameView({ game, myId, onRefresh, toast, isAdmin=false, onSeatChange }) {
   const players     = game.players;
   const chips       = game.player_chips;
   const dl          = game.drink_losses;
@@ -483,6 +497,21 @@ function GameView({ game, myId, onRefresh, toast }) {
         <span style={{color:'rgba(255,255,255,0.4)',fontFamily:'monospace',fontSize:10}}>Runde {game.round_number}</span>
       </div>
 
+      {/* Testmodus-Switcher (nur Admin) */}
+      {isAdmin && (
+        <div style={{marginBottom:12,padding:'8px 12px',background:'rgba(245,158,11,0.08)',border:'1px solid rgba(245,158,11,0.25)',borderRadius:8}}>
+          <div style={{color:'#f59e0b',fontFamily:'monospace',fontSize:10,letterSpacing:1,marginBottom:6}}>🧪 TESTMODUS — SPIELER WECHSELN</div>
+          <div style={{display:'flex',gap:6,flexWrap:'wrap'}}>
+            {players.map(p => (
+              <button key={p.id} onClick={() => onSeatChange(p.id)}
+                style={{...S.btn(myId===p.id?'#f59e0b':'#666666',true),fontSize:10}}>
+                {p.username}{myId===p.id?' ✓':''}
+              </button>
+            ))}
+          </div>
+        </div>
+      )}
+
       {/* Schockstock */}
       <Schockstock stock={game.stock} players={players} chips={chips}/>
 
@@ -544,8 +573,12 @@ export default function Schocken({ toast }) {
   const [game,     setGame]     = useState(null);
   const [showNew,  setShowNew]  = useState(false);
   const [loading,  setLoading]  = useState(true);
+  const [testSeat, setTestSeat] = useState(null); // null = eigener Account, sonst userId
 
-  const myId = getMyId();
+  const myRealId = getMyId();
+  const isAdmin  = getMyRole() === 'admin';
+  // Im Testmodus: als anderen Spieler agieren
+  const myId = (isAdmin && testSeat) ? testSeat : myRealId;
 
   const loadGames = useCallback(async () => {
     try { setGames(await api('/tools/schocken')); }
@@ -585,7 +618,7 @@ export default function Schocken({ toast }) {
       {!activeId
         ? <GameList games={games} myId={myId} onSelect={setActiveId} onNew={()=>setShowNew(true)}/>
         : game && myId
-          ? <GameView game={game} myId={myId} onRefresh={loadGame} toast={toast}/>
+          ? <GameView game={game} myId={myId} onRefresh={loadGame} toast={toast} isAdmin={isAdmin} onSeatChange={id=>{setTestSeat(id);}} />
           : <div style={{color:'rgba(255,255,255,0.3)',fontFamily:'monospace',textAlign:'center',paddingTop:40}}>Lade…</div>
       }