diff --git a/test/fixtures/test-parallel.behavior.json b/test/fixtures/test-parallel.behavior.json
index bb47e531db7..727aef8c198 100644
--- a/test/fixtures/test-parallel.behavior.json
+++ b/test/fixtures/test-parallel.behavior.json
@@ -94,6 +94,10 @@
         "file": "extensions/telegram/src/fetch.test.ts",
         "reason": "This Telegram transport suite measured ~759.3 MiB RSS growth locally; keep it in its own forked channel lane so the shared channels worker can recycle immediately after the hotspot file."
       },
+      {
+        "file": "extensions/telegram/src/monitor.test.ts",
+        "reason": "This Telegram monitor suite measured ~748.4 MiB RSS growth locally; keep it in its own forked channel lane so the shared channels worker can recycle immediately after the hotspot file."
+      },
       {
         "file": "extensions/telegram/src/webhook.test.ts",
         "reason": "This Telegram webhook suite hoists grammY bot and InputFile mocks; keep it in its own forked channel lane so shared workers do not reuse telegram runtime modules with mismatched constructors."