diff --git a/tests/hermes_state/test_shared_session_db_registry.py b/tests/hermes_state/test_shared_session_db_registry.py
index 01f8bce964..58d4837625 100644
--- a/tests/hermes_state/test_shared_session_db_registry.py
+++ b/tests/hermes_state/test_shared_session_db_registry.py
@@ -35,10 +35,12 @@ def _clean_registry():
     registry.close_all()
     registry._generations.clear()
     registry._retired.clear()
+    registry._opening.clear()
     yield
     registry.close_all()
     registry._generations.clear()
     registry._retired.clear()
+    registry._opening.clear()
 
 
 def _replace_file_preserving_schema(src: Path, dst: Path) -> None: