diff --git a/test/fixtures/demo-os/package.json b/test/fixtures/demo-os/package.json
index 164737a469..eac8154e3a 100644
--- a/test/fixtures/demo-os/package.json
+++ b/test/fixtures/demo-os/package.json
@@ -92,7 +92,7 @@
     "should": "6.0.3",
     "sinon": "1.14.1",
     "supertest": "1.0.1",
-    "testem": "0.8.3",
+    "testem": "3.4.3",
     "top-gh-contribs": "2.0.2"
   }
 }