diff --git a/test/unittests.html b/test/unittests.html
index 06db2137..ebe2c3fe 100644
--- a/test/unittests.html
+++ b/test/unittests.html
@@ -16,7 +16,7 @@
     <script src="lib/fetch.js"></script>
     <script>
         mocha.setup('bdd');
-        mocha.timeout(20000);
+        mocha.timeout(240000);
     </script>
     <script src="lib/unittests-bundle.js"></script>
     <script>