diff --git a/tests/test_per_token_group_quant_mxfp4_fused.py b/tests/test_per_token_group_quant_mxfp4_fused.py
index 193e5b781..420930432 100644
--- a/tests/test_per_token_group_quant_mxfp4_fused.py
+++ b/tests/test_per_token_group_quant_mxfp4_fused.py
@@ -9,6 +9,8 @@
 import pytest
 import torch
 
+torch.manual_seed(42)
+
 try:
     import sgl_kernel