diff --git a/tests/kernels/quantization/test_fp8_quant.py b/tests/kernels/quantization/test_fp8_quant.py
index 0a3edd4ddc16..c2e70ffb8d34 100644
--- a/tests/kernels/quantization/test_fp8_quant.py
+++ b/tests/kernels/quantization/test_fp8_quant.py
@@ -11,11 +11,9 @@
 from tests.kernels.utils import opcheck
 from vllm.platforms import current_platform
 
-DTYPES = [torch.half, torch.bfloat16, torch.float]
-HIDDEN_SIZES = [1, 2, 3, 4, 16, 67, 768, 2048, 5120, 5137, 8192,
-                8193]  # Arbitrary values for testing
-HIDDEN_SIZES += list(range(1024, 1033))  # vectorized conversion edge cases
-NUM_TOKENS = [1, 7, 83, 4096]  # Arbitrary values for testing
+DTYPES = [torch.bfloat16, torch.float]
+HIDDEN_SIZES = [17, 1024, 1025, 1026, 5137, 8193]
+NUM_TOKENS = [1, 7, 4096]
 SCALE_UBS = [True, False]
 SEEDS = [0]
 
diff --git a/tests/kernels/quantization/test_int8_quant.py b/tests/kernels/quantization/test_int8_quant.py
index 5a37b976db9e..c1c9bf191d5b 100644
--- a/tests/kernels/quantization/test_int8_quant.py
+++ b/tests/kernels/quantization/test_int8_quant.py
@@ -9,10 +9,9 @@
 from vllm._custom_ops import scaled_int8_quant
 from vllm.platforms import current_platform
 
-DTYPES = [torch.half, torch.bfloat16, torch.float]
-HIDDEN_SIZES = [16, 67, 768, 5137, 8193]  # Arbitrary values for testing
-HIDDEN_SIZES += list(range(1024, 1033))  # vectorized conversion edge cases
-NUM_TOKENS = [1, 7, 83, 4096]  # Arbitrary values for testing
+DTYPES = [torch.bfloat16, torch.float]
+HIDDEN_SIZES = [17, 1024, 1025, 1026, 5137, 8193]
+NUM_TOKENS = [1, 7, 4096]
 SEEDS = [0]
 SCALE = [0.1, 2.1]
 
diff --git a/tests/kernels/quantization/test_machete_mm.py b/tests/kernels/quantization/test_machete_mm.py
index a7cb2a4e7f21..a842d2f1cbe8 100644
--- a/tests/kernels/quantization/test_machete_mm.py
+++ b/tests/kernels/quantization/test_machete_mm.py
@@ -34,8 +34,6 @@
 
 MNK_SHAPES = [
     (1, 128, 128),
-    (1, 512, 1024),
-    (1, 4096, 4096),
     (1, 8192, 28672),
     (13, 8192, 4096),
     (26, 4096, 8192),
@@ -43,8 +41,6 @@
     (64, 8192, 28672),
     (257, 128, 4096),
     (257, 4224, 4160),
-    (257, 4096, 4096),
-    (1024, 4096, 8192),
     (1024, 8192, 4096),
 ]
 
diff --git a/tests/kernels/quantization/test_marlin_gemm.py b/tests/kernels/quantization/test_marlin_gemm.py
index 1bd6713ce7fb..cea7700ac329 100644
--- a/tests/kernels/quantization/test_marlin_gemm.py
+++ b/tests/kernels/quantization/test_marlin_gemm.py
@@ -53,12 +53,8 @@
 MNK_FACTORS = [
     (1, 1, 1),
     (1, 4, 8),
-    (1, 7, 5),
-    (13, 17, 67),
     (26, 37, 13),
-    (67, 13, 11),
     (257, 13, 11),
-    (658, 13, 11),
 ]
 
 DTYPES = [torch.float16, torch.bfloat16]
diff --git a/tests/kernels/quantization/test_rocm_skinny_gemms.py b/tests/kernels/quantization/test_rocm_skinny_gemms.py
index 533a4fe59677..03d5d98739c5 100644
--- a/tests/kernels/quantization/test_rocm_skinny_gemms.py
+++ b/tests/kernels/quantization/test_rocm_skinny_gemms.py
@@ -8,15 +8,55 @@
 from vllm.platforms import current_platform
 
 DTYPES = [torch.bfloat16, torch.float16]
-M = [16, 32, 64, 128, 256, 512, 1024, 4096, 8192]
-K = [8, 16, 32, 64, 128, 256, 512, 1024, 2048, 4096, 6144, 8192]  # k % 8 == 0
-N = [1, 2, 3, 4]
+# Specific (N, K, M) combinations for targeted testing
+NKM_FACTORS_LLMM1 = [
+    # Small, medium, large cases
+    (1, 8, 16),
+    (1, 32, 64),
+    (1, 128, 256),
+    (1, 512, 1024),
+    (1, 2048, 4096),
+    # Edge cases with specific K sizes
+    (1, 6144, 1024),
+    (1, 8192, 2048),
+    # Very large case
+    (1, 4096, 8192),
+]
+
+NKM_FACTORS_WVSPLITK = [
+    # Different batch sizes with key dimensions
+    (1, 16, 16),
+    (1, 64, 64),
+    (2, 256, 256),
+    (3, 1024, 1024),
+    (4, 4096, 4096),
+    # Extended K values
+    (1, 9216, 512),
+    (2, 10240, 1024),
+    (4, 16384, 8192),
+    # Minimum M constraint validation (m >= 8)
+    (1, 64, 8),
+    (2, 128, 8),
+    (4, 256, 8),
+]
+
+NKM_FACTORS_WVSPLITK_FP8 = [
+    # FP8-specific cases with K % 16 == 0
+    (1, 16, 16),
+    (1, 64, 64),
+    (2, 512, 512),
+    (3, 2048, 2048),
+    (4, 4096, 4096),
+    # Extended FP8 dimensions not covered by WVSPLITK
+    (1, 14336, 1024),
+    (2, 24576, 2048),
+    (4, 32768, 28672),
+]
+
 SEEDS = [0]
 
 
-@pytest.mark.parametrize("n", [1])  # only test for batch size 1
-@pytest.mark.parametrize("k", K)
-@pytest.mark.parametrize("m", M)
+@pytest.mark.parametrize("n,k,m", NKM_FACTORS_LLMM1)
 @pytest.mark.parametrize("dtype", DTYPES)
 @pytest.mark.parametrize("rows_per_block", [2, 4, 8, 16])
 @pytest.mark.parametrize("seed", SEEDS)
@@ -34,9 +74,7 @@ def test_rocm_llmm1_kernel(n, k, m, dtype, rows_per_block, seed):
     assert torch.allclose(out, ref_out, rtol=0.01)
 
 
-@pytest.mark.parametrize("n", N)  # only test for batch size <= 4
-@pytest.mark.parametrize("k", K + [9216, 10240, 16384])
-@pytest.mark.parametrize("m", [8] + M)  # m >= 8
+@pytest.mark.parametrize("n,k,m", NKM_FACTORS_WVSPLITK)
 @pytest.mark.parametrize("dtype", DTYPES)
 @pytest.mark.parametrize("seed", SEEDS)
 @pytest.mark.skipif(not current_platform.is_rocm(),
@@ -54,9 +92,7 @@ def test_rocm_wvsplitk_kernel(n, k, m, dtype, seed):
     assert torch.allclose(out, ref_out, rtol=0.01)
 
 
-@pytest.mark.parametrize("n", N)  # only test for batch size <= 4
-@pytest.mark.parametrize("k", K[1:] + [14336, 24576, 32768])  # k % 16 == 0
-@pytest.mark.parametrize("m", M + [28672])  # m >= 16
+@pytest.mark.parametrize("n,k,m", NKM_FACTORS_WVSPLITK_FP8)
 @pytest.mark.parametrize("dtype", DTYPES)
 @pytest.mark.parametrize("seed", SEEDS)
 @pytest.mark.skipif(
diff --git a/tests/kernels/quantization/test_triton_scaled_mm.py b/tests/kernels/quantization/test_triton_scaled_mm.py
index 8a2cc3baced2..24245663fb1d 100644
--- a/tests/kernels/quantization/test_triton_scaled_mm.py
+++ b/tests/kernels/quantization/test_triton_scaled_mm.py
@@ -60,10 +60,18 @@ def test_rocm_compressed_tensors_w8a8(vllm_runner, example_prompts, model_path,
                                             num_logprobs)
 
 
-@pytest.mark.parametrize("M", [1, 33, 64, 512])
-@pytest.mark.parametrize("N", [256, 971, 20486])
-@pytest.mark.parametrize("K", [128, 496, 1024])
-@pytest.mark.parametrize("out_dtype", [torch.float16, torch.bfloat16])
+MNK_FACTORS = [
+    (1, 256, 128),
+    (33, 256, 496),
+    (64, 971, 1024),
+    (64, 20486, 128),
+    (512, 256, 496),
+    (512, 20486, 1024),
+]
+
+
+@pytest.mark.parametrize("M,N,K", MNK_FACTORS)
+@pytest.mark.parametrize("out_dtype", [torch.bfloat16])
 @pytest.mark.parametrize("in_dtype", get_8bit_types())
 @pytest.mark.parametrize("use_scalar_scale_a", [True, False])
 @pytest.mark.parametrize("use_scalar_scale_b", [True, False])