diff --git a/tests/regression/03-practical/21-pfscan_combine_minimal.c b/tests/regression/03-practical/21-pfscan_combine_minimal.c
index 86cfdabac1..b8fc7948b2 100644
--- a/tests/regression/03-practical/21-pfscan_combine_minimal.c
+++ b/tests/regression/03-practical/21-pfscan_combine_minimal.c
@@ -18,7 +18,7 @@ int pqueue_init(PQUEUE *qp)
 
 void pqueue_close(PQUEUE *qp )
 {
-  pthread_mutex_lock(& qp->mtx); // WARN (must double locking)
+  pthread_mutex_lock(& qp->mtx); // TODO (OSX): WARN (must double locking)
   qp->closed = 1;
   pthread_mutex_unlock(& qp->mtx);
   return;
@@ -26,7 +26,7 @@ void pqueue_close(PQUEUE *qp )
 
 int pqueue_put(PQUEUE *qp)
 {
-  pthread_mutex_lock(& qp->mtx); // WARN (must double locking)
+  pthread_mutex_lock(& qp->mtx); // TODO (OSX): WARN (must double locking)
   if (qp->closed) {
     // pfscan actually has a bug and is missing the following unlock at early return
     // pthread_mutex_unlock(& qp->mtx);