diff --git a/curriculum/challenges/english/25-front-end-development/lab-pyramid-generator/66f2836c459cfb16ae76f24f.md b/curriculum/challenges/english/25-front-end-development/lab-pyramid-generator/66f2836c459cfb16ae76f24f.md
index f246d787f1c..97d443ff830 100644
--- a/curriculum/challenges/english/25-front-end-development/lab-pyramid-generator/66f2836c459cfb16ae76f24f.md
+++ b/curriculum/challenges/english/25-front-end-development/lab-pyramid-generator/66f2836c459cfb16ae76f24f.md
@@ -40,6 +40,12 @@ You should have a function named `pyramid`.
 assert.isFunction(pyramid);
 ```
 
+Your `pyramid` function should have three parameters.
+
+```js
+assert.lengthOf(pyramid, 3);
+```
+
 `pyramid('o', 4, false)` should return `"\n   o\n  ooo\n ooooo\nooooooo\n"`.
 
 ```js