diff --git a/lib/6to5/transform.js b/lib/6to5/transform.js
index 00961d0bd0..6bf572cc6d 100644
--- a/lib/6to5/transform.js
+++ b/lib/6to5/transform.js
@@ -38,12 +38,6 @@ var transform = module.exports = function (code, opts) {
 };
 
 transform._run = function (code, tree, opts) {
-  traverse(tree, function (node) {
-    if (node.type === "EmptyStatement") {
-      return traverse.Delete;
-    }
-  });
-
   var generateUid = util.buildUidGenerator();
 
   _.each(transform.transformers, function (transformer, name) {
@@ -108,6 +102,10 @@ transform.test = function (task, assert) {
 
   assert.equal(actualCode, expectCode);
 
+  if (task.sourceMap) {
+    assert.deepEqual(task.sourceMap, actualResult.map);
+  }
+
   if (task.sourceMappings) {
     var consumer = new sourceMap.SourceMapConsumer(actualResult.map);