1 files changed, 2 insertions, 2 deletions
diff --git a/tests/storage/test_state.py b/tests/storage/test_state.py
index 0b88308ff4..a0e133cd4a 100644
--- a/tests/storage/test_state.py
+++ b/tests/storage/test_state.py
@@ -64,8 +64,8 @@ class StateStoreTestCase(tests.unittest.TestCase):
             },
         )
 
-        event, context = yield self.event_creation_handler.create_new_client_event(
-            builder
+        event, context = yield defer.ensureDeferred(
+            self.event_creation_handler.create_new_client_event(builder)
         )
 
         yield self.storage.persistence.persist_event(event, context)