diff --git a/test/test_mbuf.c b/test/test_mbuf.c
index 9b7464f..fc37e43 100644
--- a/test/test_mbuf.c
+++ b/test/test_mbuf.c
@@ -331,6 +331,9 @@ START_TEST (test_mbuf_queue)
 
     fail_if(!uc_tailq_empty(&head));
 
+    q = uc_mbuf_dequeue(&head);
+    fail_if(q != NULL);
+
     uc_mbuf_free(m1);
     uc_mbuf_free(m2);