diff --git a/runner/lib/helpers/procsfs.js b/runner/lib/helpers/procsfs.js
index b20ee41..a28a608 100644
--- a/runner/lib/helpers/procsfs.js
+++ b/runner/lib/helpers/procsfs.js
@@ -49,6 +49,7 @@ export const makeProcfsHelper = ({ fs, spawn, startPid = process.pid }) => {
 
     return parseInt(res.toString(bufferOptions.encoding), 10);
   })();
+  userHertzP.catch(() => {});
 
   /** @typedef {string[]} ProcStat */
   /**
@@ -106,6 +107,7 @@ export const makeProcfsHelper = ({ fs, spawn, startPid = process.pid }) => {
   const getStartTicks = (stat) => parseInt(stat[21], 10);
 
   const startTicksOriginP = getStat(startPid).then(getStartTicks);
+  startTicksOriginP.catch(() => {});
 
   // TODO: Use a WeakValueMap
   /** @type {Map<string, ProcessInfo>} */
diff --git a/runner/lib/main.js b/runner/lib/main.js
index 00a0f0f..8ad5305 100644
--- a/runner/lib/main.js
+++ b/runner/lib/main.js
@@ -303,7 +303,7 @@ const main = async (progName, rawArgs, powers) => {
   /** @type {Promise<void>[]} */
   const pendingBackups = [];
   const timeSource = makeTimeSource({ performance });
-  const cpuTimeOffset = await getCPUTimeOffset();
+  const cpuTimeOffset = await getCPUTimeOffset().catch(() => 0);
   const cpuTimeSource = timeSource.shift(0 - cpuTimeOffset);
   let currentStageTimeSource = timeSource;
 
@@ -505,9 +505,11 @@ const main = async (progName, rawArgs, powers) => {
         logPerfEvent('chain-stopped');
       });
 
-      currentStageTimeSource = cpuTimeSource.shift(
-        runChainResult.processInfo.startTimestamp,
-      );
+      if (runChainResult.processInfo) {
+        currentStageTimeSource = cpuTimeSource.shift(
+          runChainResult.processInfo.startTimestamp,
+        );
+      }
 
       const slogLinesStream = Readable.from(runChainResult.slogLines);
       const slogLines = new PassThrough({ objectMode: true });
@@ -561,19 +563,21 @@ const main = async (progName, rawArgs, powers) => {
         },
       };
 
-      const chainMonitor = makeChainMonitor(
-        {
-          processInfo: runChainResult.processInfo,
-          storageLocation: chainStorageLocation,
-        },
-        {
-          ...makeConsole('monitor-chain', out, err),
-          logPerfEvent,
-          cpuTimeSource,
-          dirDiskUsage,
-        },
-      );
-      chainMonitor.start(monitorInterval);
+      const chainMonitor =
+        runChainResult.processInfo &&
+        makeChainMonitor(
+          {
+            processInfo: runChainResult.processInfo,
+            storageLocation: chainStorageLocation,
+          },
+          {
+            ...makeConsole('monitor-chain', out, err),
+            logPerfEvent,
+            cpuTimeSource,
+            dirDiskUsage,
+          },
+        );
+      chainMonitor?.start(monitorInterval);
 
       const slogMonitorDone = monitorSlog(
         { slogLines },
@@ -616,7 +620,7 @@ const main = async (progName, rawArgs, powers) => {
         async () =>
           aggregateTryFinally(
             async () => {
-              chainMonitor.stop();
+              chainMonitor?.stop();
 
               if (!chainExited) {
                 stageConsole.log('Stopping chain');
diff --git a/runner/lib/monitor/loadgen-monitor.js b/runner/lib/monitor/loadgen-monitor.js
index ee14a5f..291042a 100644
--- a/runner/lib/monitor/loadgen-monitor.js
+++ b/runner/lib/monitor/loadgen-monitor.js
@@ -1,12 +1,16 @@
 /** @typedef {import('../stats/types.js').StageStats} StageStats */
 
+/**
+ * @typedef {object} TaskNotifier
+ * @property {(task: string, seq: number) => void} start
+ * @property {(task: string, seq: number, success: boolean) => void} finish
+ */
+
 /**
  * @param {import("../tasks/types.js").RunLoadgenInfo} loadgenInfo
  * @param {object} param1
  * @param {StageStats} param1.stats
- * @param {object} [param1.notifier]
- * @param {(task: string, seq: number) => void} [param1.notifier.start]
- * @param {(task: string, seq: number, success: boolean) => void} [param1.notifier.finish]
+ * @param {TaskNotifier} [param1.notifier]
  * @param {Console} param1.console
  */
 export const monitorLoadgen = async (
diff --git a/runner/lib/tasks/local-chain.js b/runner/lib/tasks/local-chain.js
index 48ebd67..a70cbc4 100644
--- a/runner/lib/tasks/local-chain.js
+++ b/runner/lib/tasks/local-chain.js
@@ -334,7 +334,7 @@ export const makeTasks = ({
 
         const processInfo = await getProcessInfo(
           /** @type {number} */ (chainCp.pid),
-        );
+        ).catch(() => undefined);
 
         return harden({
           stop,
@@ -576,7 +576,7 @@ export const makeTasks = ({
 
         const processInfo = await getProcessInfo(
           /** @type {number} */ (soloCp.pid),
-        );
+        ).catch(() => undefined);
 
         const stop = () => {
           ignoreKill.signal = 'SIGTERM';
diff --git a/runner/lib/tasks/testnet.js b/runner/lib/tasks/testnet.js
index a984704..ffd9fbe 100644
--- a/runner/lib/tasks/testnet.js
+++ b/runner/lib/tasks/testnet.js
@@ -157,15 +157,17 @@ export const makeTasks = ({
     }
 
     console.log('Fetching network config');
-    // eslint-disable-next-line jsdoc/check-alignment
-    const { chainName, peers, rpcAddrs, seeds } = /**
-     * @type {{
-     *   chainName: string,
-     *   peers: string[],
-     *   rpcAddrs: string[],
-     *   seeds: string[]
-     * } & Record<string, unknown>}
-     */ (await fetchAsJSON(`${testnetOrigin}/network-config`));
+    /**
+     * @typedef {object} NetworkConfigRequired
+     * @property {string} chainName
+     * @property {string[]} peers
+     * @property {string[]} rpcAddrs
+     * @property {string[]} seeds
+     */
+    const { chainName, peers, rpcAddrs, seeds } =
+      /** @type {NetworkConfigRequired & Record<string, unknown>} */ (
+        await fetchAsJSON(`${testnetOrigin}/network-config`)
+      );
 
     if (withMonitor !== false) {
       storageLocations.chainStorageLocation = chainStateDir;
@@ -208,7 +210,9 @@ export const makeTasks = ({
         const config = await TOML.parse.async(
           await fs.readFile(configPath, 'utf-8'),
         );
-        const configP2p = /** @type {TOML.JsonMap} */ (config.p2p);
+        const configP2p = /** @type {import('@iarna/toml').JsonMap} */ (
+          config.p2p
+        );
         configP2p.persistent_peers = peers.join(',');
         configP2p.seeds = seeds.join(',');
         configP2p.addr_book_strict = false;
@@ -496,7 +500,7 @@ ${chainName} chain does not yet know of address ${soloAddr}
 
         const processInfo = await getProcessInfo(
           /** @type {number} */ (chainCp.pid),
-        );
+        ).catch(() => undefined);
 
         return harden({
           stop,
@@ -607,7 +611,7 @@ ${chainName} chain does not yet know of address ${soloAddr}
 
         const processInfo = await getProcessInfo(
           /** @type {number} */ (soloCp.pid),
-        );
+        ).catch(() => undefined);
 
         const stop = () => {
           ignoreKill.signal = 'SIGTERM';
diff --git a/runner/lib/tasks/types.d.ts b/runner/lib/tasks/types.d.ts
index 0e8799f..9627713 100644
--- a/runner/lib/tasks/types.d.ts
+++ b/runner/lib/tasks/types.d.ts
@@ -25,7 +25,9 @@ export type TaskResult = {
 
 export type RunKernelInfo = {
   readonly slogLines: AsyncIterable<Buffer>;
-  readonly processInfo: import('../helpers/process-info.js').ProcessInfo;
+  readonly processInfo:
+    | import('../helpers/process-info.js').ProcessInfo
+    | undefined;
 };
 
 export type TaskEventStatus = Record<string, unknown> & {