diff --git a/test/registered/cpu/test_binding.py b/test/registered/cpu/test_binding.py
index 045829730..6721ee217 100644
--- a/test/registered/cpu/test_binding.py
+++ b/test/registered/cpu/test_binding.py
@@ -29,7 +29,7 @@ class TestBinding(CustomTestCase):
         self.assertEqual(bindings, expected_cores)
 
 
-class TestInitThreadsBinding(unittest.TestCase):
+class TestInitThreadsBinding(CustomTestCase):
     """Tests for init_threads_binding: NUMA/core selection by global rank.
 
     numa_index is the worker's global device id (gpu_id) across all DP
diff --git a/test/registered/cpu/test_request_decompression.py b/test/registered/cpu/test_request_decompression.py
index 06a7ce556..79c642eb0 100644
--- a/test/registered/cpu/test_request_decompression.py
+++ b/test/registered/cpu/test_request_decompression.py
@@ -7,6 +7,7 @@ from sglang.srt.entrypoints.http_request_decompression import (
     RequestDecompressionMiddleware,
 )
 from sglang.test.ci.ci_register import register_cpu_ci
+from sglang.test.test_utils import CustomTestCase
 
 register_cpu_ci(est_time=5, suite="stage-a-test-cpu-intel")
 
@@ -47,7 +48,7 @@ def _drive(scope, body_chunks):
     return (seen or None), sent
 
 
-class TestRequestDecompressionMiddleware(unittest.TestCase):
+class TestRequestDecompressionMiddleware(CustomTestCase):
     def test_passthrough_when_header_absent(self):
         scope = {"type": "http", "headers": [(b"content-length", b"4")]}
         seen, sent = _drive(scope, [(b"abcd", False)])
diff --git a/test/registered/cpu/test_request_headers.py b/test/registered/cpu/test_request_headers.py
index 392a4f57d..d7800209d 100644
--- a/test/registered/cpu/test_request_headers.py
+++ b/test/registered/cpu/test_request_headers.py
@@ -6,6 +6,7 @@ from starlette.datastructures import Headers
 
 from sglang.srt.entrypoints.request_headers import apply_header_overrides
 from sglang.test.ci.ci_register import register_cpu_ci
+from sglang.test.test_utils import CustomTestCase
 
 register_cpu_ci(est_time=4, suite="stage-a-test-cpu-intel")
 
@@ -23,7 +24,7 @@ def _obj():
     )
 
 
-class TestApplyRoutingHeaders(unittest.TestCase):
+class TestApplyRoutingHeaders(CustomTestCase):
     def test_sets_all_fields_with_types(self):
         obj = _obj()
         apply_header_overrides(
diff --git a/test/registered/cpu/test_server_args_backend.py b/test/registered/cpu/test_server_args_backend.py
index 52d8aadaa..5427990f4 100644
--- a/test/registered/cpu/test_server_args_backend.py
+++ b/test/registered/cpu/test_server_args_backend.py
@@ -9,12 +9,13 @@ from sglang.srt.arg_groups.platform_hook import handle_cpu_backends
 from sglang.srt.arg_groups.validation_hook import validate_ib_devices
 from sglang.srt.server_args import ServerArgs
 from sglang.test.ci.ci_register import register_cpu_ci
+from sglang.test.test_utils import CustomTestCase
 
 register_cpu_ci(est_time=6, suite="stage-a-test-cpu-intel")
 register_cpu_ci(est_time=10, suite="base-b-test-cpu-arm64")
 
 
-class TestServerArgsCPUBackend(unittest.TestCase):
+class TestServerArgsCPUBackend(CustomTestCase):
     def _make_server_args(self, attention_backend=None):
         server_args = ServerArgs.__new__(ServerArgs)
         server_args.device = "cpu"
@@ -45,7 +46,7 @@ class TestServerArgsCPUBackend(unittest.TestCase):
         self.assertEqual(resolution_result(server_args, "sampling_backend"), "pytorch")
 
 
-class TestServerArgsIBDeviceValidation(unittest.TestCase):
+class TestServerArgsIBDeviceValidation(CustomTestCase):
     def _validate_ib_devices(self, device_str, available_devices=None):
         available_devices = available_devices or [
             "mlx5_0",