diff --git a/backtracking/subarray_sum.cpp b/backtracking/subarray_sum.cpp
index f30dbbd12..934f75dbf 100644
--- a/backtracking/subarray_sum.cpp
+++ b/backtracking/subarray_sum.cpp
@@ -111,6 +111,6 @@ static void test() {
  * @returns 0 on exit
  */
 int main() {
-    test();  // execute the test
+    test();  // run self-test implementations
     return 0;
 }