diff --git a/test/srt/test_deepseek_v3_fp4_4gpu.py b/test/srt/test_deepseek_v3_fp4_4gpu.py
index a63f52501..d92216e7a 100644
--- a/test/srt/test_deepseek_v3_fp4_4gpu.py
+++ b/test/srt/test_deepseek_v3_fp4_4gpu.py
@@ -35,6 +35,8 @@ class TestDeepseekV3FP4(CustomTestCase):
             "modelopt_fp4",
             "--kv-cache-dtype",
             "fp8_e4m3",
+            "--model-loader-extra-config",
+            '{"enable_multithread_load": true}',
         ]
         cls.process = popen_launch_server(
             cls.model,
@@ -106,6 +108,8 @@ class TestDeepseekV3FP4MTP(CustomTestCase):
             "4",
             "--kv-cache-dtype",
             "fp8_e4m3",
+            "--model-loader-extra-config",
+            '{"enable_multithread_load": true}',
         ]
         cls.process = popen_launch_server(
             cls.model,
@@ -184,6 +188,8 @@ class TestDeepseekV3FP4CutlassMoE(CustomTestCase):
             "flashinfer_cutlass",
             "--quantization",
             "modelopt_fp4",
+            "--model-loader-extra-config",
+            '{"enable_multithread_load": true}',
         ]
         cls.process = popen_launch_server(
             cls.model,