diff --git a/runtests.py b/runtests.py
index 75a7253..ac8d9f1 100755
--- a/runtests.py
+++ b/runtests.py
@@ -74,6 +74,7 @@ if not settings.configured:
         ],
         POLYMORPHIC_TEST_SWAPPABLE="polymorphic.swappedmodel",
         ROOT_URLCONF=None,
+        SECRET_KEY="supersecret"
     )