diff --git a/scripts/ci/check_registered_tests.py b/scripts/ci/check_registered_tests.py
index 7c012b45d..d9f80121c 100755
--- a/scripts/ci/check_registered_tests.py
+++ b/scripts/ci/check_registered_tests.py
@@ -4,13 +4,18 @@ Pre-commit hook: validate CI registry calls under test/registered/.
 
 1. Every test file must contain a CI registry call (register_cuda_ci,
    register_amd_ci, etc.).
-2. A CUDA test must not register a `{stage}-test-{runner_config}`-shaped suite
-   via the legacy single-string `suite=`: that form is not dispatchable via
-   /rerun-test. Use the modern `stage=`/`runner_config=` form instead -- it
-   resolves to the identical suite (CIRegistry.effective_suite is
-   f"{stage}-test-{runner_config}"), so same stage and same runner, just
-   /rerun-test-able. Legacy `suite=` stays valid for nightly/stress/weekly +
-   AMD/CPU/NPU suites whose names don't follow that shape.
+2. A CUDA test must register its PR-test suite via the modern
+   `stage=`/`runner_config=` form. The legacy single-string `suite=` is reserved
+   for the nightly/stress/weekly families (and for AMD/CPU/NPU suites); any other
+   CUDA `suite=` resolves to a name no PR-test workflow invokes, so the test
+   silently never runs. Two shapes are rejected:
+     a. `{stage}-test-{runner_config}` -- the modern name stuffed back into the
+        legacy form. Reported with the exact stage/runner split to use.
+     b. an older `{stage}-{runner_config}` PR-test name (e.g. the pre-migration
+        `base-b-kernel-unit-1-gpu-large`) -- no longer matches any workflow
+        suite at all.
+   The modern form resolves to the identical suite (CIRegistry.effective_suite
+   is f"{stage}-test-{runner_config}") and is /rerun-test-able.
 
 Reuses ut_parse_one_file() from ci_register.py (AST-based parsing)
 to match the same logic used by run_suite.py's collect_tests().
@@ -27,6 +32,12 @@ import sys
 # shape is always expressible (and should be expressed) the modern way.
 _MODERN_SHAPE = re.compile(r"^(.+)-test-(.+)$")
 
+# The only suite families a CUDA registry may keep on the legacy single-string
+# `suite=` form. Everything else is a PR-test/base stage that must use the
+# modern stage=/runner_config= form (otherwise its effective_suite matches no
+# suite the PR-test workflows invoke, and the test silently never runs).
+_LEGACY_CUDA_PREFIXES = ("nightly", "stress", "weekly")
+
 
 def main() -> int:
     # Import ci_register directly to avoid pulling in all of sglang
@@ -48,7 +59,8 @@ def main() -> int:
         return 0
 
     missing = []
-    legacy_shape = []  # (file, suite, stage, runner_config)
+    legacy_shape = []  # (file, suite, stage, runner_config) -- has a -test- split
+    non_dispatchable = []  # (file, suite) -- legacy CUDA suite no workflow invokes
     for f in files:
         try:
             registries, _has_main_entry = ci_register.ut_parse_one_file(f)
@@ -67,9 +79,15 @@ def main() -> int:
                 and r.runner_config is None
             ):
                 continue
+            # nightly/stress/weekly are the only CUDA suites allowed to stay on
+            # the legacy single-string form.
+            if r.suite.split("-", 1)[0] in _LEGACY_CUDA_PREFIXES:
+                continue
             m = _MODERN_SHAPE.match(r.suite)
             if m:
                 legacy_shape.append((f, r.suite, m.group(1), m.group(2)))
+            else:
+                non_dispatchable.append((f, r.suite))
 
     exit_code = 0
     if missing:
@@ -94,6 +112,21 @@ def main() -> int:
             )
         print()
         exit_code = 1
+    if non_dispatchable:
+        print(
+            'ERROR: CUDA test(s) register a legacy `suite="..."` that is neither a '
+            "nightly/stress/weekly suite nor the modern `stage=`/`runner_config=` "
+            "form. This name matches no suite the PR-test workflows invoke, so the "
+            "test silently never runs. Switch to the modern form:\n"
+        )
+        for f, suite in non_dispatchable:
+            print(
+                f"  {f}\n"
+                f'    suite="{suite}"'
+                f'  ->  stage="...", runner_config="..."'
+            )
+        print()
+        exit_code = 1
 
     return exit_code
 
diff --git a/test/registered/dcp/test_reduce_scatter_along_dim.py b/test/registered/dcp/test_reduce_scatter_along_dim.py
index c29eed194..cbad393e6 100644
--- a/test/registered/dcp/test_reduce_scatter_along_dim.py
+++ b/test/registered/dcp/test_reduce_scatter_along_dim.py
@@ -29,7 +29,8 @@ from sglang.test.ci.ci_register import register_cuda_ci
 
 register_cuda_ci(
     est_time=120,
-    suite="base-b-kernel-unit-8-gpu-h200",
+    stage="extra-b",
+    runner_config="8-gpu-h200",
 )
 
 # ---------------------------------------------------------------------------
diff --git a/test/registered/jit/benchmark/bench_dsv3_fused_a_gemm.py b/test/registered/jit/benchmark/bench_dsv3_fused_a_gemm.py
index b1d34cc2f..ef084d79d 100644
--- a/test/registered/jit/benchmark/bench_dsv3_fused_a_gemm.py
+++ b/test/registered/jit/benchmark/bench_dsv3_fused_a_gemm.py
@@ -20,7 +20,9 @@ from sglang.srt.utils.common import is_sm120_supported
 from sglang.test.ci.ci_register import register_cuda_ci
 from sglang.utils import is_in_ci
 
-register_cuda_ci(est_time=12, suite="base-b-kernel-benchmark-1-gpu-large")
+register_cuda_ci(
+    est_time=12, stage="base-b-kernel-benchmark", runner_config="1-gpu-large"
+)
 
 IS_CI = is_in_ci()
 
diff --git a/test/registered/jit/benchmark/bench_dsv3_router_gemm.py b/test/registered/jit/benchmark/bench_dsv3_router_gemm.py
index b1e60de7c..a6df11bdd 100644
--- a/test/registered/jit/benchmark/bench_dsv3_router_gemm.py
+++ b/test/registered/jit/benchmark/bench_dsv3_router_gemm.py
@@ -18,7 +18,9 @@ from sglang.jit_kernel.dsv3_router_gemm import dsv3_router_gemm
 from sglang.jit_kernel.utils import get_jit_cuda_arch, is_hip_runtime
 from sglang.test.ci.ci_register import register_cuda_ci
 
-register_cuda_ci(est_time=5, suite="base-b-kernel-benchmark-1-gpu-large")
+register_cuda_ci(
+    est_time=5, stage="base-b-kernel-benchmark", runner_config="1-gpu-large"
+)
 
 # sgl_kernel AOT kernel is specialized for hidden_dim=7168 only.
 SGL_KERNEL_HIDDEN_DIM = 7168
diff --git a/test/registered/jit/benchmark/bench_sparse_mla_q8kv8_prefill_sm90.py b/test/registered/jit/benchmark/bench_sparse_mla_q8kv8_prefill_sm90.py
index 548df53c6..2a89fb23f 100644
--- a/test/registered/jit/benchmark/bench_sparse_mla_q8kv8_prefill_sm90.py
+++ b/test/registered/jit/benchmark/bench_sparse_mla_q8kv8_prefill_sm90.py
@@ -20,7 +20,9 @@ except ImportError:
     flash_mla_sparse_fwd = None
     HAS_Q16_FLASHMLA = False
 
-register_cuda_ci(est_time=120, suite="base-b-kernel-benchmark-1-gpu-large")
+register_cuda_ci(
+    est_time=120, stage="base-b-kernel-benchmark", runner_config="1-gpu-large"
+)
 
 IS_CI = is_in_ci()
 DTYPE_FP8 = torch.float8_e4m3fn
diff --git a/test/registered/jit/benchmark/bench_symm_mem_all_gather.py b/test/registered/jit/benchmark/bench_symm_mem_all_gather.py
index dd562d87d..9abb934ff 100644
--- a/test/registered/jit/benchmark/bench_symm_mem_all_gather.py
+++ b/test/registered/jit/benchmark/bench_symm_mem_all_gather.py
@@ -37,7 +37,8 @@ from sglang.test.ci.ci_register import register_cuda_ci
 
 register_cuda_ci(
     est_time=120,
-    suite="base-b-kernel-benchmark-1-gpu-large",
+    stage="base-b-kernel-benchmark",
+    runner_config="1-gpu-large",
     disabled="requires multi-GPU, self-skips in CI",
 )
 
diff --git a/test/registered/jit/benchmark/diffusion/bench_causal_conv3d_cat_pad.py b/test/registered/jit/benchmark/diffusion/bench_causal_conv3d_cat_pad.py
index 229eeeffa..f4e6ae892 100644
--- a/test/registered/jit/benchmark/diffusion/bench_causal_conv3d_cat_pad.py
+++ b/test/registered/jit/benchmark/diffusion/bench_causal_conv3d_cat_pad.py
@@ -13,7 +13,8 @@ from sglang.test.ci.ci_register import register_cuda_ci
 
 register_cuda_ci(
     est_time=20,
-    suite="base-b-kernel-benchmark-1-gpu-large",
+    stage="base-b-kernel-benchmark",
+    runner_config="1-gpu-large",
     disabled="standalone benchmark",
 )
 
diff --git a/test/registered/jit/benchmark/diffusion/bench_residual_gate_add.py b/test/registered/jit/benchmark/diffusion/bench_residual_gate_add.py
index d8e3e0e45..32b46fe7c 100644
--- a/test/registered/jit/benchmark/diffusion/bench_residual_gate_add.py
+++ b/test/registered/jit/benchmark/diffusion/bench_residual_gate_add.py
@@ -9,7 +9,9 @@ from sglang.jit_kernel.diffusion.triton.scale_shift import fuse_scale_shift_kern
 from sglang.test.ci.ci_register import register_cuda_ci
 from sglang.utils import is_in_ci
 
-register_cuda_ci(est_time=30, suite="base-b-kernel-benchmark-1-gpu-large")
+register_cuda_ci(
+    est_time=30, stage="base-b-kernel-benchmark", runner_config="1-gpu-large"
+)
 
 
 @dataclass(frozen=True)
diff --git a/test/registered/jit/diffusion/test_causal_conv3d_cat_pad.py b/test/registered/jit/diffusion/test_causal_conv3d_cat_pad.py
index 68afd07ac..2d93e652a 100644
--- a/test/registered/jit/diffusion/test_causal_conv3d_cat_pad.py
+++ b/test/registered/jit/diffusion/test_causal_conv3d_cat_pad.py
@@ -12,8 +12,8 @@ from sglang.jit_kernel.diffusion.triton.causal_conv3d_pad import (
 from sglang.jit_kernel.utils import get_ci_test_range
 from sglang.test.ci.ci_register import register_cuda_ci
 
-register_cuda_ci(est_time=45, suite="base-b-kernel-unit-1-gpu-large")
-register_cuda_ci(est_time=45, suite="base-b-kernel-unit-1-gpu-b200")
+register_cuda_ci(est_time=45, stage="base-b-kernel-unit", runner_config="1-gpu-large")
+register_cuda_ci(est_time=45, stage="base-b-kernel-unit", runner_config="4-gpu-b200")
 
 DEVICE = "cuda"
 DTYPE = torch.bfloat16
diff --git a/test/registered/jit/diffusion/test_ltx2_ada_values.py b/test/registered/jit/diffusion/test_ltx2_ada_values.py
index a9c5fd226..8ae4c4a30 100644
--- a/test/registered/jit/diffusion/test_ltx2_ada_values.py
+++ b/test/registered/jit/diffusion/test_ltx2_ada_values.py
@@ -6,7 +6,7 @@ import torch
 from sglang.jit_kernel.diffusion.triton.ltx2_ada_values import ltx2_ada_values9
 from sglang.test.ci.ci_register import register_cuda_ci
 
-register_cuda_ci(est_time=8, suite="base-b-kernel-unit-1-gpu-large")
+register_cuda_ci(est_time=8, stage="base-b-kernel-unit", runner_config="1-gpu-large")
 
 DEVICE = "cuda"
 
diff --git a/test/registered/jit/diffusion/test_residual_gate_add.py b/test/registered/jit/diffusion/test_residual_gate_add.py
index 973fe8618..6c9b7aee1 100644
--- a/test/registered/jit/diffusion/test_residual_gate_add.py
+++ b/test/registered/jit/diffusion/test_residual_gate_add.py
@@ -9,8 +9,8 @@ from sglang.jit_kernel.diffusion.residual_gate_add import (
 )
 from sglang.test.ci.ci_register import register_cuda_ci
 
-register_cuda_ci(est_time=30, suite="base-b-kernel-unit-1-gpu-large")
-register_cuda_ci(est_time=30, suite="base-b-kernel-unit-1-gpu-b200")
+register_cuda_ci(est_time=30, stage="base-b-kernel-unit", runner_config="1-gpu-large")
+register_cuda_ci(est_time=30, stage="base-b-kernel-unit", runner_config="4-gpu-b200")
 
 
 CASES = [
diff --git a/test/registered/jit/test_cutedsl_dsv3_fused_a_gemm.py b/test/registered/jit/test_cutedsl_dsv3_fused_a_gemm.py
index 83162b52d..398d965e4 100644
--- a/test/registered/jit/test_cutedsl_dsv3_fused_a_gemm.py
+++ b/test/registered/jit/test_cutedsl_dsv3_fused_a_gemm.py
@@ -9,7 +9,7 @@ from sglang.jit_kernel.cutedsl_dsv3_fused_a_gemm import dsv3_fused_a_gemm
 from sglang.jit_kernel.utils import get_jit_cuda_arch, is_hip_runtime
 from sglang.test.ci.ci_register import register_cuda_ci
 
-register_cuda_ci(est_time=30, suite="base-b-kernel-unit-1-gpu-large")
+register_cuda_ci(est_time=30, stage="base-b-kernel-unit", runner_config="1-gpu-large")
 
 # hd_in must be a multiple of 256; 6144/7168 cover the real fused-A shapes.
 HD_INS = [6144, 7168]
diff --git a/test/registered/jit/test_dsv32_indexer_fusion.py b/test/registered/jit/test_dsv32_indexer_fusion.py
index 596ad4d62..6c068b9ba 100644
--- a/test/registered/jit/test_dsv32_indexer_fusion.py
+++ b/test/registered/jit/test_dsv32_indexer_fusion.py
@@ -31,7 +31,7 @@ from sglang.test.ci.ci_register import register_cuda_ci
 
 _is_hip = is_hip()
 
-register_cuda_ci(est_time=45, suite="base-b-kernel-unit-1-gpu-large")
+register_cuda_ci(est_time=45, stage="base-b-kernel-unit", runner_config="1-gpu-large")
 register_cuda_ci(est_time=90, suite="nightly-kernel-1-gpu", nightly=True)
 
 HEAD_DIM = 128
diff --git a/test/registered/jit/test_dsv3_fused_a_gemm.py b/test/registered/jit/test_dsv3_fused_a_gemm.py
index 5c34eef58..01308d55e 100644
--- a/test/registered/jit/test_dsv3_fused_a_gemm.py
+++ b/test/registered/jit/test_dsv3_fused_a_gemm.py
@@ -10,7 +10,7 @@ from sglang.jit_kernel.dsv3_fused_a_gemm import dsv3_fused_a_gemm
 from sglang.jit_kernel.utils import get_jit_cuda_arch, is_hip_runtime
 from sglang.test.ci.ci_register import register_cuda_ci
 
-register_cuda_ci(est_time=30, suite="base-b-kernel-unit-1-gpu-large")
+register_cuda_ci(est_time=30, stage="base-b-kernel-unit", runner_config="1-gpu-large")
 
 # hd_in must be a multiple of 256; 6144/7168 cover the real fused-A shapes.
 HD_INS = [6144, 7168]
diff --git a/test/registered/jit/test_dsv3_router_gemm.py b/test/registered/jit/test_dsv3_router_gemm.py
index c9638b7f8..c8535a211 100644
--- a/test/registered/jit/test_dsv3_router_gemm.py
+++ b/test/registered/jit/test_dsv3_router_gemm.py
@@ -9,7 +9,7 @@ from sglang.jit_kernel.dsv3_router_gemm import dsv3_router_gemm
 from sglang.jit_kernel.utils import get_jit_cuda_arch, is_hip_runtime
 from sglang.test.ci.ci_register import register_cuda_ci
 
-register_cuda_ci(est_time=37, suite="base-b-kernel-unit-1-gpu-large")
+register_cuda_ci(est_time=37, stage="base-b-kernel-unit", runner_config="1-gpu-large")
 register_cuda_ci(est_time=148, suite="nightly-kernel-1-gpu", nightly=True)
 
 HIDDEN_DIMS = [1024, 4096, 5120, 6144, 7168]
diff --git a/test/registered/jit/test_silu_and_mul_scaled_fp4_experts_quant_packed.py b/test/registered/jit/test_silu_and_mul_scaled_fp4_experts_quant_packed.py
index 9be9ba92e..f1c71bc65 100644
--- a/test/registered/jit/test_silu_and_mul_scaled_fp4_experts_quant_packed.py
+++ b/test/registered/jit/test_silu_and_mul_scaled_fp4_experts_quant_packed.py
@@ -47,7 +47,7 @@ from sglang.test.ci.ci_register import register_cuda_ci
 
 # The NVFP4 expert-quant kernels are Blackwell-only (sm100a), so this runs on
 # the B200 unit suite.
-register_cuda_ci(est_time=20, suite="base-b-kernel-unit-1-gpu-b200")
+register_cuda_ci(est_time=20, stage="base-b-kernel-unit", runner_config="4-gpu-b200")
 
 FLOAT8_E4M3_MAX = 448.0
 FLOAT4_E2M1_MAX = 6.0
diff --git a/test/registered/jit/test_sparse_mla_q8kv8_prefill_sm90.py b/test/registered/jit/test_sparse_mla_q8kv8_prefill_sm90.py
index 40727f3c6..97319199c 100644
--- a/test/registered/jit/test_sparse_mla_q8kv8_prefill_sm90.py
+++ b/test/registered/jit/test_sparse_mla_q8kv8_prefill_sm90.py
@@ -9,7 +9,7 @@ import torch
 from sglang.srt.utils import is_sm90_supported
 from sglang.test.ci.ci_register import register_cuda_ci
 
-register_cuda_ci(est_time=120, suite="base-b-kernel-unit-1-gpu-large")
+register_cuda_ci(est_time=120, stage="base-b-kernel-unit", runner_config="1-gpu-large")
 register_cuda_ci(est_time=300, suite="nightly-kernel-1-gpu", nightly=True)
 
 
diff --git a/test/registered/jit/test_symm_mem_all_gather.py b/test/registered/jit/test_symm_mem_all_gather.py
index b472f3917..069e018e9 100644
--- a/test/registered/jit/test_symm_mem_all_gather.py
+++ b/test/registered/jit/test_symm_mem_all_gather.py
@@ -34,7 +34,7 @@ from sglang.srt.distributed.device_communicators.triton_symm_mem_ag import (
 )
 from sglang.test.ci.ci_register import register_cuda_ci
 
-register_cuda_ci(est_time=240, suite="base-b-kernel-unit-8-gpu-h200")
+register_cuda_ci(est_time=240, stage="base-b-kernel-unit", runner_config="8-gpu-h200")
 register_cuda_ci(est_time=240, suite="nightly-kernel-8-gpu-h200", nightly=True)
 
 # ---------------------------------------------------------------------------