diff --git a/lib/ipni-client.js b/lib/ipni-client.js
index f93a63c..2a13437 100644
--- a/lib/ipni-client.js
+++ b/lib/ipni-client.js
@@ -16,7 +16,7 @@ export async function queryTheIndex (cid, providerId) {
   try {
     const res = await fetch(url)
     if (!res.ok) {
-      console.error('IPNI query failed, HTTP response: %s %s', res.status, await res.text())
+      console.error('IPNI query failed, HTTP response: %s %s', res.status, (await res.text()).trimEnd())
       return { indexerResult: `ERROR_${res.status}` }
     }
 
diff --git a/lib/miner-info.js b/lib/miner-info.js
index f69db09..0761184 100644
--- a/lib/miner-info.js
+++ b/lib/miner-info.js
@@ -36,7 +36,7 @@ async function rpc (method, ...params) {
   const res = await fetch(req)
 
   if (!res.ok) {
-    throw new Error(`JSON RPC failed with ${res.code}: ${await res.text()}`)
+    throw new Error(`JSON RPC failed with ${res.code}: ${(await res.text()).trimEnd()}`)
   }
 
   const body = await res.json()
diff --git a/lib/spark.js b/lib/spark.js
index f731832..168de42 100644
--- a/lib/spark.js
+++ b/lib/spark.js
@@ -153,14 +153,13 @@ export default class Spark {
         }
       } else {
         console.error('Retrieval failed with status code %s: %s',
-          res.status, await res.text())
+          res.status, (await res.text()).trimEnd())
       }
     } finally {
       clearTimeout(timeout)
     }
 
     stats.endAt = new Date()
-    console.log(stats)
   }
 
   async submitMeasurement (task, stats) {
@@ -226,6 +225,7 @@ export default class Spark {
       if (delay > 0) {
         console.log('Sleeping for %s seconds before starting the next task...', Math.round(delay / 1000))
         await sleep(delay)
+        console.log() // add an empty line to visually delimit logs from different tasks
       }
     }
   }
@@ -247,7 +247,7 @@ async function assertOkResponse (res, errorMsg) {
   try {
     body = await res.text()
   } catch {}
-  const err = new Error(`${errorMsg ?? 'Fetch failed'} (${res.status}): ${body}`)
+  const err = new Error(`${errorMsg ?? 'Fetch failed'} (${res.status}): ${body.trimEnd()}`)
   err.statusCode = res.status
   err.serverMessage = body
   throw err
diff --git a/manual-check.js b/manual-check.js
index 50906cd..5b83efe 100644
--- a/manual-check.js
+++ b/manual-check.js
@@ -13,3 +13,4 @@ const minerId = 'f010479'
 const spark = new Spark()
 const stats = { cid, minerId, indexerResult: null, statusCode: null, byteLength: 0 }
 await spark.executeRetrievalCheck({ cid, minerId }, stats)
+console.log('Measurement: %o', stats)