diff --git a/client/less/challenge.less b/client/less/challenge.less
index e3f6224fad..308ad10e3c 100644
--- a/client/less/challenge.less
+++ b/client/less/challenge.less
@@ -116,6 +116,7 @@
   font-family: "Ubuntu Mono";
   margin-top: 8px;
   line-height:20px;
+  word-wrap: break-word;
 }
 
 .grayed-out-test-output {