diff --git a/tests/hs-run-filtered.js b/tests/hs-run-filtered.js
index e1a626b3..9fa66352 100755
--- a/tests/hs-run-filtered.js
+++ b/tests/hs-run-filtered.js
@@ -869,6 +869,8 @@ for(let i=startTest;i<Math.min(endTest,testCount);i++){
     "hs-upstream-expressions/collectionExpressions": 60000,
     "hs-upstream-expressions/typecheck": 30000,
     "hs-upstream-behavior": 20000,
+    // eventsource: JIT saturation after multiple compilations in suite sequence
+    "hs-upstream-ext/eventsource": 30000,
   };
   _testDeadline = Date.now() + (_SLOW_DEADLINE[name] || _SLOW_DEADLINE_SUITES[suite] || 10000);
   globalThis.__hs_deadline = _testDeadline; // expose to WASM cek_step_loop