diff --git a/tools/run_tests/run_microbenchmark.py b/tools/run_tests/run_microbenchmark.py
index 3bb4a9547c8..d748e5a0ce4 100755
--- a/tools/run_tests/run_microbenchmark.py
+++ b/tools/run_tests/run_microbenchmark.py
@@ -173,7 +173,7 @@ argp.add_argument('-c', '--collect',
                   default=sorted(collectors.keys()),
                   help='Which collectors should be run against each benchmark')
 argp.add_argument('-b', '--benchmarks',
-                  default=['bm_fullstack'],
+                  default=['bm_fullstack', 'bm_closure'],
                   nargs='+',
                   type=str,
                   help='Which microbenchmarks should be run')