diff --git a/Zend/tests/arginfo_zpp_mismatch.phpt b/Zend/tests/arginfo_zpp_mismatch.phpt
index d7aefc6f374f..94f6b070900e 100644
--- a/Zend/tests/arginfo_zpp_mismatch.phpt
+++ b/Zend/tests/arginfo_zpp_mismatch.phpt
@@ -10,6 +10,36 @@ if (getenv('SKIP_MSAN')) die("skip msan misses interceptors for some functions")
 
 require __DIR__ . "/arginfo_zpp_mismatch.inc";
 
+function testWeakSysvIpcFunction($function): bool {
+    if (!in_array($function, ['msg_queue_exists', 'msg_get_queue', 'sem_get', 'shm_attach'], true)) {
+        return false;
+    }
+
+    for ($argumentCount = 0; $argumentCount <= 8; $argumentCount++) {
+        $arguments = array_fill(0, $argumentCount, null);
+        if ($function === 'msg_queue_exists' && $argumentCount >= 1) {
+            $arguments[0] = 1;
+        }
+        if (($function === 'sem_get' || $function === 'shm_attach') && $argumentCount >= 3) {
+            $arguments[2] = 0600;
+        }
+
+        try {
+            $result = @$function(...$arguments);
+            if ($result instanceof SysvMessageQueue) {
+                msg_remove_queue($result);
+            } elseif ($result instanceof SysvSemaphore) {
+                sem_remove($result);
+            } elseif ($result instanceof SysvSharedMemory) {
+                shm_remove($result);
+            }
+        } catch (Throwable) {
+        }
+    }
+
+    return true;
+}
+
 function test($function) {
     if (skipFunction($function)) {
         return;
@@ -21,6 +51,10 @@ function test($function) {
     } else {
         echo "Testing " . get_class($function[0]) . "::$function[1]\n";
     }
+    if (testWeakSysvIpcFunction($function)) {
+        ob_end_clean();
+        return;
+    }
     try {
         @$function();
     } catch (Throwable) {
diff --git a/ext/sysvmsg/tests/gh16592.phpt b/ext/sysvmsg/tests/gh16592.phpt
index 8490d000f891..f5b8119ef8d8 100644
--- a/ext/sysvmsg/tests/gh16592.phpt
+++ b/ext/sysvmsg/tests/gh16592.phpt
@@ -8,12 +8,14 @@ class Test {
     function __serialize() {}
 }
 
-$q = msg_get_queue(1);
+// use a private queue, so we only remove our own.
+$q = msg_get_queue(0, 0600);
 try {
 	msg_send($q, 1, new Test, true);
 } catch (\TypeError $e) {
 	echo $e->getMessage();
 }
+msg_remove_queue($q);
 ?>
 --EXPECT--
 Test::__serialize() must return an array