diff --git a/testing/ostest/mqueue.c b/testing/ostest/mqueue.c
index 1b4b3191c..fadbb0223 100644
--- a/testing/ostest/mqueue.c
+++ b/testing/ostest/mqueue.c
@@ -97,7 +97,7 @@ static void *sender_thread(void *arg)
   g_send_mqfd = mq_open("mqueue", O_WRONLY | O_CREAT, 0666, &attr);
   if (g_send_mqfd == (mqd_t)-1)
     {
-      printf("sender_thread: ERROR mq_open failed\n");
+      printf("sender_thread: ERROR mq_open failed, errno=%d\n", errno);
       ASSERT(false);
       pthread_exit((pthread_addr_t)1);
     }
@@ -113,8 +113,9 @@ static void *sender_thread(void *arg)
       status = mq_send(g_send_mqfd, msg_buffer, TEST_MSGLEN, 42);
       if (status < 0)
         {
-          printf("sender_thread: ERROR mq_send failure=%d on msg %d\n",
-                 status, i);
+          printf("sender_thread: ERROR mq_send failure=%d on msg %d, "
+                 "errno=%d\n",
+                 status, i, errno);
           ASSERT(false);
           nerrors++;
         }
@@ -128,7 +129,7 @@ static void *sender_thread(void *arg)
 
   if (mq_close(g_send_mqfd) < 0)
     {
-      printf("sender_thread: ERROR mq_close failed\n");
+      printf("sender_thread: ERROR mq_close failed, errno=%d\n", errno);
       ASSERT(false);
     }
   else
@@ -170,7 +171,7 @@ static void *receiver_thread(void *arg)
   g_recv_mqfd = mq_open("mqueue", O_RDONLY | O_CREAT, 0666, &attr);
   if (g_recv_mqfd == (mqd_t)-1)
     {
-      printf("receiver_thread: ERROR mq_open failed\n");
+      printf("receiver_thread: ERROR mq_open failed, errno=%d\n", errno);
       ASSERT(false);
       pthread_exit((pthread_addr_t)1);
     }