diff --git a/lib/util/http/queue.ts b/lib/util/http/queue.ts
index a645f905f193ffbd44a2daee83d7953c830e031a..731fecd1acd2d23ffbaa38b6527f33ccbe124dad 100644
--- a/lib/util/http/queue.ts
+++ b/lib/util/http/queue.ts
@@ -18,7 +18,7 @@ export function getQueue(url: string): PQueue | null {
     queue = null; // null represents "no queue", as opposed to undefined
     const concurrency = getRequestLimit(url);
     if (concurrency) {
-      logger.debug({ concurrency, host }, 'Using queue');
+      logger.debug(`Using queue: host=${host}, concurrency=${concurrency}`);
       queue = new PQueue({ concurrency });
     } else {
       logger.debug({ host }, 'No concurrency limits');
diff --git a/lib/workers/repository/package-files.ts b/lib/workers/repository/package-files.ts
index 6bd9c43b3a17ed7421ebc29a3c406088ad520033..0dc26a8c7db3d62c1ad70231f3e98f9f4af1cc28 100644
--- a/lib/workers/repository/package-files.ts
+++ b/lib/workers/repository/package-files.ts
@@ -18,10 +18,7 @@ export class PackageFiles {
   }
 
   static clear(): void {
-    logger.debug(
-      { baseBranches: [...this.data.keys()] },
-      'PackageFiles.clear() - Package files deleted'
-    );
+    logger.debug('PackageFiles.clear() - Package files deleted');
     this.data.clear();
   }
 
diff --git a/lib/workers/repository/process/extract-update.ts b/lib/workers/repository/process/extract-update.ts
index 2ca6d3344aa023f8d4e339573f5918ade7e52742..44894838d2a509bef33d6b33edcf579be55b3fe4 100644
--- a/lib/workers/repository/process/extract-update.ts
+++ b/lib/workers/repository/process/extract-update.ts
@@ -79,7 +79,9 @@ export async function extract(
     cachedExtract?.sha === baseBranchSha &&
     cachedExtract?.configHash === configHash
   ) {
-    logger.debug({ baseBranch, baseBranchSha }, 'Found cached extract');
+    logger.debug(
+      `Found cached extract for ${baseBranch!} (sha=${baseBranchSha})`
+    );
     packageFiles = cachedExtract.packageFiles;
     try {
       for (const files of Object.values(packageFiles)) {
diff --git a/lib/workers/repository/process/write.ts b/lib/workers/repository/process/write.ts
index 7b8600fc104c2c950faafdbecea5a6dd1733ed7b..66bca98b1e3e8c1270a2a251126bfbc8d2f8b03c 100644
--- a/lib/workers/repository/process/write.ts
+++ b/lib/workers/repository/process/write.ts
@@ -102,13 +102,12 @@ export async function writeUpdates(
       .join(', ')}`
   );
   const prsRemaining = await getPrsRemaining(config, branches);
-  logger.debug({ prsRemaining }, 'Calculated maximum PRs remaining this run');
+  logger.debug(`Calculated maximum PRs remaining this run: ${prsRemaining}`);
   setMaxLimit(Limit.PullRequests, prsRemaining);
 
   const branchesRemaining = await getBranchesRemaining(config, branches);
   logger.debug(
-    { branchesRemaining },
-    'Calculated maximum branches remaining this run'
+    `Calculated maximum branches remaining this run: ${branchesRemaining}`
   );
   setMaxLimit(Limit.Branches, branchesRemaining);