diff --git a/setup.py b/setup.py
--- a/setup.py
+++ b/setup.py
@@ -35,6 +35,7 @@ is_windows = __platform__ in _get_meta_v
 requirements = [
     "waitress==0.8.2",
     "webob==1.0.8",
+    "webtest==1.4.3",
     "Pylons==1.0.0",
     "Beaker==1.6.4",
     "WebHelpers==1.3",