Fix typechecks against twisted trunk (#13061)

1 files changed, 1 insertions, 0 deletions

diff --git a/tests/state/test_v2.py b/tests/state/test_v2.py

index 78b83d97b6..2e3f2318d9 100644
--- a/tests/state/test_v2.py
+++ b/tests/state/test_v2.py
@@ -495,6 +495,7 @@ class StateTestCase(unittest.TestCase):
 
             prev_events = list(graph[node_id])
 
+            state_before: StateMap[str]
             if len(prev_events) == 0:
                 state_before = {}
             elif len(prev_events) == 1: