diff --git a/test/setup.js b/test/setup.js
index 990ff7af7a..cac2351127 100644
--- a/test/setup.js
+++ b/test/setup.js
@@ -1,6 +1,6 @@
 'use strict';
 
-const unexpected = require('unexpected');
+var unexpected = require('unexpected');
 global.expect = require('./assertions').mixinMochaAssertions(
   unexpected.clone()
 );