diff --git a/ext/pcntl/tests/gh11498.phpt b/ext/pcntl/tests/gh11498.phpt
index a9dc784ff6a..4a9f87a94d8 100644
--- a/ext/pcntl/tests/gh11498.phpt
+++ b/ext/pcntl/tests/gh11498.phpt
@@ -19,7 +19,8 @@ pcntl_signal(SIGCHLD, function($sig, $info) use (&$processes) {
 }, false);
 
 for ($i = 0; $i <= 5; $i++) {
-    $process = proc_open('echo $$ > /dev/null', [], $pipes);
+    // Sleeping ensures we get to add the process to the list before the signal is invoked.
+    $process = proc_open('sleep 1', [], $pipes);
     $pid = proc_get_status($process)['pid'];
     $processes[$pid] = $process;
 }