1 files changed, 1 insertions, 1 deletions

diff --git a/tests/test_state.py b/tests/test_state.py

index 55f37c521f..0274c4bc18 100644
--- a/tests/test_state.py
+++ b/tests/test_state.py
@@ -35,7 +35,7 @@ def create_event(name=None, type=None, state_key=None, depth=2, event_id=None,
 
     if not event_id:
         _next_event_id += 1
-        event_id = str(_next_event_id)
+        event_id = "$%s:test" % (_next_event_id,)
 
     if not name:
         if state_key is not None: