diff --git a/src/js/textmode.js b/src/js/textmode.js
index b9e6574..a4adde2 100644
--- a/src/js/textmode.js
+++ b/src/js/textmode.js
@@ -442,6 +442,12 @@ textmode.validate = function () {
     this.content.style.marginBottom = (-height) + 'px';
     this.content.style.paddingBottom = height + 'px';
   }
+
+  // update the height of the ace editor
+  if (this.aceEditor) {
+    var force = false;
+    this.aceEditor.resize(force);
+  }
 };
 
 // define modes
diff --git a/test/test_schema.html b/test/test_schema.html
index 28f615a..e48dee0 100644
--- a/test/test_schema.html
+++ b/test/test_schema.html
@@ -64,7 +64,7 @@
   };
 
   var options = {
-    mode: 'tree',
+    mode: 'code',
     modes: ['code', 'form', 'text', 'tree', 'view'], // allowed modes
     onError: function (err) {
       console.error(err);