diff --git a/editors/demo/src/HHMI/layout/EditorElements.js b/editors/demo/src/HHMI/layout/EditorElements.js
index e0f3b57ac42f93e9c2c77d5f581fdf04bb753b9c..9e27d8924194a7f54ea7f6647fb9ede55a4e90b6 100644
--- a/editors/demo/src/HHMI/layout/EditorElements.js
+++ b/editors/demo/src/HHMI/layout/EditorElements.js
@@ -109,6 +109,10 @@ export default css`
       position: relative;
       right: 20px;
     }
+
+    p span.wax-selection-marker:last-of-type {
+      display: none;
+    }
   }
 
   .mutiple-choice.ProseMirror-selectednode {