diff --git a/src/algorithms/sorting/heap-sort/__test__/HeapSort.test.js b/src/algorithms/sorting/heap-sort/__test__/HeapSort.test.js
index bc5a364e..1b877aee 100644
--- a/src/algorithms/sorting/heap-sort/__test__/HeapSort.test.js
+++ b/src/algorithms/sorting/heap-sort/__test__/HeapSort.test.js
@@ -8,6 +8,8 @@ import {
 } from '../../SortTester';
 
 // Complexity constants.
+// These numbers don't take into account up/dow heapifying of the heap.
+// Thus these numbers are higher in reality.
 const SORTED_ARRAY_VISITING_COUNT = 40;
 const NOT_SORTED_ARRAY_VISITING_COUNT = 40;
 const REVERSE_SORTED_ARRAY_VISITING_COUNT = 40;