diff --git a/common/lib/capa/capa/templates/textbox.html b/common/lib/capa/capa/templates/textbox.html
index dbdb597cf9..73cb1def60 100644
--- a/common/lib/capa/capa/templates/textbox.html
+++ b/common/lib/capa/capa/templates/textbox.html
@@ -27,9 +27,6 @@
-
-
-
-
diff --git a/lms/static/css/codemirror.css b/lms/static/css/codemirror.css
index c28dfae339..daee5f6ab7 100644
--- a/lms/static/css/codemirror.css
+++ b/lms/static/css/codemirror.css
@@ -1,4 +1,5 @@
.CodeMirror {
+ border: 2px solid black;
line-height: 1em;
font-family: monospace;
}