diff --git a/sparta/test/PriorityQueue/PriorityQueue_test.cpp b/sparta/test/PriorityQueue/PriorityQueue_test.cpp
index 6e6d94e441..636bee48fd 100644
--- a/sparta/test/PriorityQueue/PriorityQueue_test.cpp
+++ b/sparta/test/PriorityQueue/PriorityQueue_test.cpp
@@ -20,7 +20,7 @@ void test_defafult_pq()
     EXPECT_EQUAL(pqueue.size(), 8);
 
     EXPECT_EQUAL(pqueue.top(), 1);
-    pqueue.pop();
+    pqueue.pop(); // 1
 
     EXPECT_FALSE(pqueue.empty());