diff --git a/test/fixtures/transformation/esnext-es6-classes/enumerable.js b/test/fixtures/transformation/esnext-es6-classes/enumerable.js
index fe5c02d113..392fda2ca9 100644
--- a/test/fixtures/transformation/esnext-es6-classes/enumerable.js
+++ b/test/fixtures/transformation/esnext-es6-classes/enumerable.js
@@ -17,4 +17,4 @@ for (var key in point) {
 }
 
 assert.equal(point.toString(), '(1, 2)');
-assert.deepEqual(keys.sort(), ['x', 'y']);
+assert.deepEqual(keys.sort(), ['toString', 'x', 'y']);