diff --git a/.github/workflows/perf-pr-repeat.yml b/.github/workflows/perf-pr-repeat.yml
index f385430d9..3ccc631c5 100644
--- a/.github/workflows/perf-pr-repeat.yml
+++ b/.github/workflows/perf-pr-repeat.yml
@@ -221,7 +221,9 @@ jobs:
             // Resolved in the refs step so it works for both pull_request and
             // workflow_dispatch (where there's no pull_request in the payload).
             const issue_number = Number(process.env.PR);
-            const {data: comments} = await github.rest.issues.listComments({owner, repo, issue_number});
+            // paginate: the default page is 30, and a sticky upsert past that
+            // silently duplicates. Same call in perf-pr.yml.
+            const comments = await github.paginate(github.rest.issues.listComments, {owner, repo, issue_number});
             const existing = comments.find(c => c.body && c.body.includes(marker));
             if (existing) {
               await github.rest.issues.updateComment({owner, repo, comment_id: existing.id, body});
diff --git a/.github/workflows/perf-pr.yml b/.github/workflows/perf-pr.yml
index c8e52ece0..37e617bda 100644
--- a/.github/workflows/perf-pr.yml
+++ b/.github/workflows/perf-pr.yml
@@ -204,7 +204,9 @@ jobs:
             // Resolved in the refs step so it works for both pull_request and
             // workflow_dispatch (where there's no pull_request in the payload).
             const issue_number = Number(process.env.PR);
-            const {data: comments} = await github.rest.issues.listComments({owner, repo, issue_number});
+            // paginate: the default page is 30, and a sticky upsert past that
+            // silently duplicates. Same call in perf-pr-repeat.yml.
+            const comments = await github.paginate(github.rest.issues.listComments, {owner, repo, issue_number});
             const existing = comments.find(c => c.body && c.body.includes(marker));
             if (existing) {
               await github.rest.issues.updateComment({owner, repo, comment_id: existing.id, body});