diff --git a/tests/e2e/load/test_session_anomaly.py b/tests/e2e/load/test_session_anomaly.py
index 80f8aff3ba4..7062587352b 100644
--- a/tests/e2e/load/test_session_anomaly.py
+++ b/tests/e2e/load/test_session_anomaly.py
@@ -62,7 +62,7 @@ class TestSummarizePlannedTurns:
 
 class TestRetried:
     def test_transient_failures_then_success_returns_the_success(self) -> None:
-        outcome = Success(data=SessionMessagesResponse())
+        outcome = Success[SessionMessagesResponse](status_code=200, data=SessionMessagesResponse())
         calls = iter(
             (NetworkError(message="overloaded"), NetworkError(message="overloaded"), outcome)
         )
@@ -88,7 +88,7 @@ class TestRetried:
             raise AssertionError("slept after a successful attempt")
 
         result = retried(
-            lambda: Success(data=SessionMessagesResponse()),
+            lambda: Success[SessionMessagesResponse](status_code=200, data=SessionMessagesResponse()),
             attempts=3,
             sleep=sleep_means_retry,
         )