diff --git a/beat/web/experiments/tests.py b/beat/web/experiments/tests.py
index b00e97fddc67096b414753673b7d0f33d7812a7d..413b243d637082847c847999a2a7e9273f3b1f8b 100755
--- a/beat/web/experiments/tests.py
+++ b/beat/web/experiments/tests.py
@@ -906,7 +906,7 @@ class ExperimentModificationAPI(ExperimentTestBase):
 
         experiment = experiments[0]
         self.assertEqual(experiment.short_description, 'short description')
-        self.assertEqual(experiment.description, 'long description')
+        self.assertEqual(experiment.description, b'long description')
 
 
 #----------------------------------------------------------