diff --git a/test/cpp/end2end/BUILD b/test/cpp/end2end/BUILD
index 4c28eee4d15..c061947e1cb 100644
--- a/test/cpp/end2end/BUILD
+++ b/test/cpp/end2end/BUILD
@@ -223,6 +223,7 @@ grpc_cc_test(
         ":end2end_test_lib",
     ],
     size = "large",  # with poll-cv this takes long, see #17493
+    timeout = "long",
 )
 
 grpc_cc_test(