diff --git a/common/app/Panes/Pane.jsx b/common/app/Panes/Pane.jsx
index b3c5dedc38..93629d0512 100644
--- a/common/app/Panes/Pane.jsx
+++ b/common/app/Panes/Pane.jsx
@@ -23,8 +23,8 @@ export function Pane({
     position: 'absolute',
     right: right + '%',
     top: 0,
-    paddingLeft: '4px',
-    paddingRight: '4px'
+    paddingLeft: '0px',
+    paddingRight: '0px'
   };
   return (
     <div style={ style }>
diff --git a/common/app/routes/Challenges/challenges.less b/common/app/routes/Challenges/challenges.less
index bb155942d9..c57d2ab4eb 100644
--- a/common/app/routes/Challenges/challenges.less
+++ b/common/app/routes/Challenges/challenges.less
@@ -227,6 +227,7 @@
 .@{ns}-preview {
   .max-element-height();
   width: 100%;
+  overflow-y: hidden;
 }
 
 .@{ns}-preview-frame {