diff --git a/test/cpp/end2end/BUILD b/test/cpp/end2end/BUILD
index 47cb6ba14c3..4c28eee4d15 100644
--- a/test/cpp/end2end/BUILD
+++ b/test/cpp/end2end/BUILD
@@ -222,6 +222,7 @@ grpc_cc_test(
     deps = [
         ":end2end_test_lib",
     ],
+    size = "large",  # with poll-cv this takes long, see #17493
 )
 
 grpc_cc_test(