diff --git a/message_passing/safe_message_handlers/activities.py b/message_passing/safe_message_handlers/activities.py
index f3e369ce..da8a8be0 100644
--- a/message_passing/safe_message_handlers/activities.py
+++ b/message_passing/safe_message_handlers/activities.py
@@ -18,7 +18,7 @@ class ClusterState:
 
 @activity.defn
 async def start_cluster() -> ClusterState:
-    return ClusterState(node_ids=[f"{i}" for i in range(25)])
+    return ClusterState(node_ids=[f"node-{i}" for i in range(25)])
 
 
 @activity.defn
@@ -47,7 +47,7 @@ class FindBadNodesInput:
 @activity.defn
 async def find_bad_nodes(input: FindBadNodesInput) -> Set[str]:
     await asyncio.sleep(0.1)
-    bad_nodes = set([n for n in input.nodes_to_check if int(n) % 5 == 0])
+    bad_nodes = set([id for id in input.nodes_to_check if hash(id) % 5 == 0])
     if bad_nodes:
         print(f"Found bad nodes: {bad_nodes}")
     else: