diff --git a/infra/fast-time/tn-late-join.mjs b/infra/fast-time/tn-late-join.mjs
index 87db8444..e3cb8aa9 100644
--- a/infra/fast-time/tn-late-join.mjs
+++ b/infra/fast-time/tn-late-join.mjs
@@ -101,6 +101,7 @@ class Node {
     const out = openSync(this.logFile, 'a');
     this.proc = spawn(IGNEUMD, a, { stdio: ['ignore', out, out], env: { ...process.env, IGNEUM_CLASS_SIGNAL: '4' } });
     started.push(this.proc);
+    writeFileSync(`${TMP}/n${this.i}.pid`, String(this.proc.pid));
     await sleep(1500);
     if (this.proc.exitCode != null) throw new Error(`n${this.i} exited ${this.proc.exitCode}: ${this.grepLog(/ERROR|Error|error|refused|invalid/).slice(-3).join(' | ')}`);
     for (let i = 0; i < 20; i++) {
@@ -118,6 +119,7 @@ function miner(name, grpc, threads, secs) {
   const out = openSync(`${TMP}/${name}.log`, 'a');
   const p = spawn(CPU_MINER, ['mine', grpc, String(threads), String(secs), name, '--engine', 'igneum-pow', '--payout-label', name, '--status-secs', '60', '--no-vote', '--stall-secs', '0'], { stdio: ['ignore', out, out], env: { ...process.env, IGNEUM_POW_DAY_MS: String(DAY_MS) } });
   started.push(p);
+  writeFileSync(`${TMP}/${name}.pid`, String(p.pid));
   return p;
 }
 async function stopAll() {
@@ -127,6 +129,7 @@ async function stopAll() {
 }
 process.on('SIGINT', async () => { await stopAll(); process.exit(130); });
 process.on('unhandledRejection', async (e) => { log(`FAILED: ${e?.stack || e}`); await stopAll(); process.exit(3); });
+process.on('uncaughtException', async (e) => { log(`FAILED: ${e?.stack || e}`); await stopAll(); process.exit(3); });
 
 const a = await new Node(0).start();
 const genesis = (await a.dag()).pruningPointHash;
@@ -136,6 +139,8 @@ let prover = null;
 if (PROVER) {
   const out = openSync(`${TMP}/prover.log`, 'a');
   prover = spawn('/bin/sh', ['-c', PROVER], { stdio: ['ignore', out, out], env: { ...process.env, IGNEUM_GRPC: a.grpc, IGNEUM_EVM_RPC: `http://127.0.0.1:${a.evmPort}` } });
+  started.push(prover);
+  writeFileSync(`${TMP}/prover.pid`, String(prover.pid));
   log(`prover up pid ${prover.pid}: ${PROVER}`);
 }
 const t0 = Date.now();