diff --git a/tests/conftest.py b/tests/conftest.py
index 312c992e6b..741aec1938 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -1039,7 +1039,7 @@ def inner(events, method_name):
         return [
             transaction
             for transaction in events
-            if transaction["type"] == "transaction"
+            if transaction.get("type") == "transaction"
             and any(
                 span["data"].get("mcp.method.name") == method_name
                 for span in transaction.get("spans", [])