diff --git a/js/src/carousel.js b/js/src/carousel.js
index 70c5fd286a..edaec08f2d 100644
--- a/js/src/carousel.js
+++ b/js/src/carousel.js
@@ -328,6 +328,7 @@ class Carousel extends BaseComponent {
 
     if (!activeElement || !nextElement) {
       // Some weirdness is happening, so we bail
+      // todo: change tests that use empty divs to avoid this check
       return
     }