diff --git a/test/unit/cartodb/prepare-context.test.js b/test/unit/cartodb/prepare-context.test.js
index 2eb7e890..b2864c1a 100644
--- a/test/unit/cartodb/prepare-context.test.js
+++ b/test/unit/cartodb/prepare-context.test.js
@@ -61,6 +61,8 @@ describe('prepare-context', function() {
         }
         res.locals.user = 'localhost';
 
+        res.set = function () {};
+
         return res;
     }