diff --git a/tests/constants.py b/tests/constants.py
index 0bc6673c..07a34bcd 100644
--- a/tests/constants.py
+++ b/tests/constants.py
@@ -537,6 +537,7 @@
     (MARS, {'lr': 5e-1, 'lr_1d': 5e-1, 'weight_decay': 1e-3, 'mars_type': 'adamw'}, 5),
     (MARS, {'lr': 1e-1, 'weight_decay': 1e-3, 'mars_type': 'lion', 'optimize_1d': True}, 5),
     (MARS, {'lr': 5e-1, 'lr_1d': 5e-1, 'weight_decay': 1e-3, 'mars_type': 'shampoo'}, 5),
+    (MARS, {'lr': 5e-1, 'lr_1d': 5e-1, 'weight_decay': 1e-3, 'mars_type': 'adamw', 'ams_bound': True}, 5),
 ]
 ADANORM_SUPPORTED_OPTIMIZERS: List[Tuple[Any, Dict[str, Union[float, bool, int]], int]] = [
     (AdaBelief, {'lr': 5e-1, 'weight_decay': 1e-3, 'adanorm': True}, 10),