diff --git a/tools/run_tests/generated/tests.json b/tools/run_tests/generated/tests.json
index 43879ff9b9606ebaf1c673d05a98a29c0c68c6cb..c33907a469e5a4bf220481e0cb08959ea87504ae 100644
--- a/tools/run_tests/generated/tests.json
+++ b/tools/run_tests/generated/tests.json
@@ -39675,6 +39675,31 @@
     "shortname": "json_run_localhost:cpp_protobuf_async_client_sync_server_unary_qps_unconstrained_secure", 
     "timeout_seconds": 360
   }, 
+  {
+    "args": [
+      "--scenarios_json", 
+      "{\"scenarios\": [{\"name\": \"cpp_protobuf_async_client_unary_1channel_64wide_128Breq_8MBresp_secure\", \"warmup_seconds\": 0, \"benchmark_seconds\": 1, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 0, \"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"server_type\": \"ASYNC_SERVER\"}, \"num_clients\": 1, \"client_config\": {\"client_type\": \"ASYNC_CLIENT\", \"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"payload_config\": {\"simple_params\": {\"resp_size\": 8388608, \"req_size\": 128}}, \"client_channels\": 1, \"async_client_threads\": 1, \"outstanding_rpcs_per_channel\": 1, \"rpc_type\": \"UNARY\", \"load_params\": {\"closed_loop\": {}}, \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}}]}"
+    ], 
+    "boringssl": true, 
+    "ci_platforms": [
+      "linux"
+    ], 
+    "cpu_cost": "capacity", 
+    "defaults": "boringssl", 
+    "exclude_configs": [
+      "tsan", 
+      "asan"
+    ], 
+    "excluded_poll_engines": [], 
+    "flaky": false, 
+    "language": "c++", 
+    "name": "json_run_localhost", 
+    "platforms": [
+      "linux"
+    ], 
+    "shortname": "json_run_localhost:cpp_protobuf_async_client_unary_1channel_64wide_128Breq_8MBresp_secure", 
+    "timeout_seconds": 360
+  }, 
   {
     "args": [
       "--scenarios_json", 
@@ -40054,6 +40079,31 @@
     "shortname": "json_run_localhost:cpp_protobuf_async_client_sync_server_unary_qps_unconstrained_insecure", 
     "timeout_seconds": 360
   }, 
+  {
+    "args": [
+      "--scenarios_json", 
+      "{\"scenarios\": [{\"name\": \"cpp_protobuf_async_client_unary_1channel_64wide_128Breq_8MBresp_insecure\", \"warmup_seconds\": 0, \"benchmark_seconds\": 1, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 0, \"security_params\": null, \"server_type\": \"ASYNC_SERVER\"}, \"num_clients\": 1, \"client_config\": {\"client_type\": \"ASYNC_CLIENT\", \"security_params\": null, \"payload_config\": {\"simple_params\": {\"resp_size\": 8388608, \"req_size\": 128}}, \"client_channels\": 1, \"async_client_threads\": 1, \"outstanding_rpcs_per_channel\": 1, \"rpc_type\": \"UNARY\", \"load_params\": {\"closed_loop\": {}}, \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}}]}"
+    ], 
+    "boringssl": true, 
+    "ci_platforms": [
+      "linux"
+    ], 
+    "cpu_cost": "capacity", 
+    "defaults": "boringssl", 
+    "exclude_configs": [
+      "tsan", 
+      "asan"
+    ], 
+    "excluded_poll_engines": [], 
+    "flaky": false, 
+    "language": "c++", 
+    "name": "json_run_localhost", 
+    "platforms": [
+      "linux"
+    ], 
+    "shortname": "json_run_localhost:cpp_protobuf_async_client_unary_1channel_64wide_128Breq_8MBresp_insecure", 
+    "timeout_seconds": 360
+  }, 
   {
     "args": [
       "--scenarios_json", 
@@ -40505,6 +40555,43 @@
     "shortname": "json_run_localhost:cpp_protobuf_async_client_sync_server_unary_qps_unconstrained_secure_low_thread_count", 
     "timeout_seconds": 360
   }, 
+  {
+    "args": [
+      "--scenarios_json", 
+      "{\"scenarios\": [{\"name\": \"cpp_protobuf_async_client_unary_1channel_64wide_128Breq_8MBresp_secure\", \"warmup_seconds\": 0, \"benchmark_seconds\": 1, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 0, \"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"server_type\": \"ASYNC_SERVER\"}, \"num_clients\": 1, \"client_config\": {\"client_type\": \"ASYNC_CLIENT\", \"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"payload_config\": {\"simple_params\": {\"resp_size\": 8388608, \"req_size\": 128}}, \"client_channels\": 1, \"async_client_threads\": 1, \"outstanding_rpcs_per_channel\": 1, \"rpc_type\": \"UNARY\", \"load_params\": {\"closed_loop\": {}}, \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}}]}"
+    ], 
+    "boringssl": true, 
+    "ci_platforms": [
+      "linux"
+    ], 
+    "cpu_cost": "capacity", 
+    "defaults": "boringssl", 
+    "exclude_configs": [
+      "asan-noleaks", 
+      "asan-trace-cmp", 
+      "basicprof", 
+      "counters", 
+      "dbg", 
+      "gcov", 
+      "helgrind", 
+      "lto", 
+      "memcheck", 
+      "msan", 
+      "mutrace", 
+      "opt", 
+      "stapprof", 
+      "ubsan"
+    ], 
+    "excluded_poll_engines": [], 
+    "flaky": false, 
+    "language": "c++", 
+    "name": "json_run_localhost", 
+    "platforms": [
+      "linux"
+    ], 
+    "shortname": "json_run_localhost:cpp_protobuf_async_client_unary_1channel_64wide_128Breq_8MBresp_secure_low_thread_count", 
+    "timeout_seconds": 360
+  }, 
   {
     "args": [
       "--scenarios_json", 
@@ -41064,6 +41151,43 @@
     "shortname": "json_run_localhost:cpp_protobuf_async_client_sync_server_unary_qps_unconstrained_insecure_low_thread_count", 
     "timeout_seconds": 360
   }, 
+  {
+    "args": [
+      "--scenarios_json", 
+      "{\"scenarios\": [{\"name\": \"cpp_protobuf_async_client_unary_1channel_64wide_128Breq_8MBresp_insecure\", \"warmup_seconds\": 0, \"benchmark_seconds\": 1, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 0, \"security_params\": null, \"server_type\": \"ASYNC_SERVER\"}, \"num_clients\": 1, \"client_config\": {\"client_type\": \"ASYNC_CLIENT\", \"security_params\": null, \"payload_config\": {\"simple_params\": {\"resp_size\": 8388608, \"req_size\": 128}}, \"client_channels\": 1, \"async_client_threads\": 1, \"outstanding_rpcs_per_channel\": 1, \"rpc_type\": \"UNARY\", \"load_params\": {\"closed_loop\": {}}, \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}}]}"
+    ], 
+    "boringssl": true, 
+    "ci_platforms": [
+      "linux"
+    ], 
+    "cpu_cost": "capacity", 
+    "defaults": "boringssl", 
+    "exclude_configs": [
+      "asan-noleaks", 
+      "asan-trace-cmp", 
+      "basicprof", 
+      "counters", 
+      "dbg", 
+      "gcov", 
+      "helgrind", 
+      "lto", 
+      "memcheck", 
+      "msan", 
+      "mutrace", 
+      "opt", 
+      "stapprof", 
+      "ubsan"
+    ], 
+    "excluded_poll_engines": [], 
+    "flaky": false, 
+    "language": "c++", 
+    "name": "json_run_localhost", 
+    "platforms": [
+      "linux"
+    ], 
+    "shortname": "json_run_localhost:cpp_protobuf_async_client_unary_1channel_64wide_128Breq_8MBresp_insecure_low_thread_count", 
+    "timeout_seconds": 360
+  }, 
   {
     "args": [
       "--scenarios_json", 
diff --git a/tools/run_tests/performance/scenario_config.py b/tools/run_tests/performance/scenario_config.py
index 1870a738cac2d8e91ccf0cb8765c736d68057b2d..7169c474333d6e5ed6eebfea570e187bffed8c3a 100644
--- a/tools/run_tests/performance/scenario_config.py
+++ b/tools/run_tests/performance/scenario_config.py
@@ -257,6 +257,19 @@ class CXXLanguage:
           categories=smoketest_categories + [SCALABLE],
           excluded_poll_engines = ['poll-cv'])
 
+      yield _ping_pong_scenario(
+          'cpp_protobuf_async_client_unary_1channel_64wide_128Breq_8MBresp_%s' %
+          (secstr),
+          rpc_type='UNARY',
+          client_type='ASYNC_CLIENT',
+          server_type='ASYNC_SERVER',
+          channels=1,
+          outstanding=64,
+          req_size=128,
+          resp_size=8*1024*1024,
+          secure=secure,
+          categories=smoketest_categories + [SCALABLE])
+
       yield _ping_pong_scenario(
           'cpp_protobuf_async_client_sync_server_streaming_qps_unconstrained_%s' % secstr,
           rpc_type='STREAMING',