diff --git a/scripts/ci/pr_review_merge_scheduler.py b/scripts/ci/pr_review_merge_scheduler.py
index b85e981a..6b889219 100644
--- a/scripts/ci/pr_review_merge_scheduler.py
+++ b/scripts/ci/pr_review_merge_scheduler.py
@@ -552,8 +552,10 @@ def workflow_dispatch_target(repo: str, base_ref: str) -> tuple[str, str, list[s
     "i/o timeout",
     "server error",
     "service unavailable",
+    "stream error",
     "temporary failure",
     "timeout",
+    "received from peer",
 )
 
 
diff --git a/tests/test_pr_review_merge_scheduler.py b/tests/test_pr_review_merge_scheduler.py
index 8654e488..98b47205 100644
--- a/tests/test_pr_review_merge_scheduler.py
+++ b/tests/test_pr_review_merge_scheduler.py
@@ -301,6 +301,29 @@ def fake_run(args, stdin=None):
     assert sleeps == [1, 2]
 
 
+def test_gh_graphql_retries_transient_http2_stream_cancel(monkeypatch):
+    calls = []
+    sleeps = []
+
+    def fake_run(args, stdin=None):
+        calls.append((args, stdin))
+        if len(calls) == 1:
+            raise RuntimeError(
+                "Command failed (1): gh api graphql\n"
+                "stream error: stream ID 1; CANCEL; received from peer"
+            )
+        return '{"data":{"repository":{"pullRequests":{"nodes":[],"pageInfo":{"hasNextPage":false}}}}}'
+
+    monkeypatch.setattr(sched, "run", fake_run)
+    monkeypatch.setattr(sched.time, "sleep", lambda seconds: sleeps.append(seconds))
+
+    payload = sched.gh_graphql("query", owner="owner", name="repo", pageSize=100)
+
+    assert payload["data"]["repository"]["pullRequests"]["nodes"] == []
+    assert len(calls) == 2
+    assert sleeps == [1]
+
+
 def test_gh_graphql_does_not_retry_non_transient_errors(monkeypatch):
     calls = []