diff --git a/test/cpp/microbenchmarks/bm_fullstack.cc b/test/cpp/microbenchmarks/bm_fullstack.cc
index 3528d95b5db194f3885b74e1320ae52e5ab139f9..cd8087e65b43ff72bb110f2afefd1c9e52352e95 100644
--- a/test/cpp/microbenchmarks/bm_fullstack.cc
+++ b/test/cpp/microbenchmarks/bm_fullstack.cc
@@ -432,6 +432,8 @@ BENCHMARK_TEMPLATE(BM_UnaryPingPong, InProcessCHTTP2, NoOpMutator,
                    Server_AddInitialMetadata<RandomAsciiMetadata<31>, 1>);
 BENCHMARK_TEMPLATE(BM_UnaryPingPong, InProcessCHTTP2, NoOpMutator,
                    Server_AddInitialMetadata<RandomAsciiMetadata<100>, 1>);
+BENCHMARK_TEMPLATE(BM_UnaryPingPong, InProcessCHTTP2, NoOpMutator,
+                   Server_AddInitialMetadata<RandomAsciiMetadata<10>, 100>);
 
 }  // namespace testing
 }  // namespace grpc