diff --git a/bruno/neon-sprawl-server/combat-health/Get combat health after elite attack.bru b/bruno/neon-sprawl-server/combat-health/Get combat health after elite attack.bru
index b953592..41314ea 100644
--- a/bruno/neon-sprawl-server/combat-health/Get combat health after elite attack.bru	
+++ b/bruno/neon-sprawl-server/combat-health/Get combat health after elite attack.bru	
@@ -64,10 +64,10 @@ script:pre-request {
 
   await axios.get(`${baseUrl}/game/world/npc-runtime-snapshot`);
 
-  await sleep(5000);
+  await sleep(bru, 5000);
   await axios.get(`${baseUrl}/game/world/npc-runtime-snapshot`);
 
-  await sleep(2500);
+  await sleep(bru, 2500);
   await axios.get(`${baseUrl}/game/world/npc-runtime-snapshot`);
 
   bru.setVar("neo95CastBody", JSON.stringify(castBody));
diff --git a/bruno/neon-sprawl-server/encounter-progress/Get encounter progress after defeat spine.bru b/bruno/neon-sprawl-server/encounter-progress/Get encounter progress after defeat spine.bru
index d715e61..02e23b5 100644
--- a/bruno/neon-sprawl-server/encounter-progress/Get encounter progress after defeat spine.bru	
+++ b/bruno/neon-sprawl-server/encounter-progress/Get encounter progress after defeat spine.bru	
@@ -47,7 +47,7 @@ script:pre-request {
       { schemaVersion: 1, targetId },
       jsonHeaders,
     );
-    await sleep(PULSE_COOLDOWN_MS);
+    await sleep(bru, PULSE_COOLDOWN_MS);
     const castBody = {
       schemaVersion: 1,
       slotIndex,
@@ -70,7 +70,7 @@ script:pre-request {
         return;
       }
       if (i < 3) {
-        await sleep(PULSE_COOLDOWN_MS);
+        await sleep(bru, PULSE_COOLDOWN_MS);
       }
     }
     throw new Error(`did not defeat ${targetId} within 4 pulses`);
diff --git a/bruno/neon-sprawl-server/scripts/prototype-npc-bruno-helper.js b/bruno/neon-sprawl-server/scripts/prototype-npc-bruno-helper.js
index 2638715..a1cd06c 100644
--- a/bruno/neon-sprawl-server/scripts/prototype-npc-bruno-helper.js
+++ b/bruno/neon-sprawl-server/scripts/prototype-npc-bruno-helper.js
@@ -10,8 +10,9 @@ const PROTOTYPE_NPC_ANCHORS = {
 /** <c>prototype_pulse</c> catalog cooldown (seconds) — real-time Bruno waits. */
 const PULSE_COOLDOWN_MS = 3200;
 
-function sleep(ms) {
-  return new Promise((resolve) => setTimeout(resolve, ms));
+/** Bruno sandbox has no <c>setTimeout</c> — use <c>bru.sleep</c>. */
+async function sleep(bru, ms) {
+  await bru.sleep(ms);
 }
 
 async function moveNearPrototypeNpc(baseUrl, playerId, targetId, jsonHeaders) {