diff --git a/tests/ffi/many_listener_callbacks_test.dart b/tests/ffi/many_listener_callbacks_test.dart
index 3e73e02c7a8..329484271d9 100644
--- a/tests/ffi/many_listener_callbacks_test.dart
+++ b/tests/ffi/many_listener_callbacks_test.dart
@@ -54,7 +54,7 @@ void main() async {
 
   await firstIsRunning.future;
 
-  for (var i = 0; i < 30; ++i) {
+  for (var i = 0; i < 10; ++i) {
     spawn((int n) {});
   }