diff --git a/others/easter.cpp b/others/easter.cpp
index f154566f2..c3561cd9d 100644
--- a/others/easter.cpp
+++ b/others/easter.cpp
@@ -102,6 +102,6 @@ static void test() {
 
 // Main
 int main() {
-    test();
+    test();  // run self-test implementations
     return 0;
 }