diff --git a/tests/kernels/attention/test_aiter_flash_attn.py b/tests/kernels/attention/test_aiter_flash_attn.py
index d0687c62b113..2d882bdf4066 100644
--- a/tests/kernels/attention/test_aiter_flash_attn.py
+++ b/tests/kernels/attention/test_aiter_flash_attn.py
@@ -9,10 +9,10 @@ import torch
 import vllm.v1.attention.backends.rocm_aiter_fa  # noqa: F401
 from vllm.platforms import current_platform
 
-NUM_HEADS = [(4, 4), (8, 2), (16, 2)]
+NUM_HEADS = [(4, 4), (8, 2)]
 HEAD_SIZES = [128, 256]
-BLOCK_SIZES = [16, 32]
-DTYPES = [torch.float16, torch.bfloat16]
+BLOCK_SIZES = [16]
+DTYPES = [torch.bfloat16]
 QDTYPES = [None]
 # one value large enough to test overflow in index calculation.
 # one value small enough to test the schema op check
diff --git a/tests/kernels/attention/test_attention.py b/tests/kernels/attention/test_attention.py
index 2e0b4efebfdb..7083661575ef 100644
--- a/tests/kernels/attention/test_attention.py
+++ b/tests/kernels/attention/test_attention.py
@@ -29,17 +29,14 @@ MAX_SEQ_LEN = get_max_shared_memory_bytes() // FLOAT32_BYTES - 512
 NUM_BLOCKS = 4321  # Arbitrary values for testing
 PARTITION_SIZE = 512
 PARTITION_SIZE_ROCM = 256
-# flshattF and tritonflashattF supported: {torch.float16, torch.bfloat16}
-DTYPES = [
-    torch.half, torch.bfloat16, torch.float
-] if not current_platform.is_rocm() else [torch.half, torch.bfloat16]
+DTYPES = [torch.bfloat16]
 NUM_GEN_SEQS = [7]  # Arbitrary values for testing
 NUM_PREFILL_SEQS = [3]  # Arbitrary values for testing
 NUM_HEADS = [(40, 40), (64, 8)]  # Arbitrary values for testing
 
 # This should be sync with get_supported_head_sizes() in
 # vllm.attention.ops.paged_attn.PagedAttention
-HEAD_SIZES = [32, 64, 80, 96, 112, 120, 128, 192, 256]
+HEAD_SIZES = [32, 80, 128, 256]
 
 BLOCK_SIZES = [16, 32]
 USE_ALIBI = [False, True]
diff --git a/tests/kernels/attention/test_cache.py b/tests/kernels/attention/test_cache.py
index 789507615580..8c3cc8cba9d9 100644
--- a/tests/kernels/attention/test_cache.py
+++ b/tests/kernels/attention/test_cache.py
@@ -11,11 +11,11 @@ from vllm import _custom_ops as ops
 from vllm.platforms import current_platform
 
 COPYING_DIRECTION = [('cuda', 'cpu'), ('cuda', 'cuda'), ('cpu', 'cuda')]
-DTYPES = [torch.half, torch.bfloat16, torch.float]
+DTYPES = [torch.bfloat16, torch.float]
 NUM_TOKENS = [42]  # Arbitrary values for testing
 NUM_LAYERS = [1]  # Arbitrary values for testing
 NUM_HEADS = [8]  # Arbitrary values for testing
-HEAD_SIZES = [64, 80, 120, 256]
+HEAD_SIZES = [64, 80, 256]
 BLOCK_SIZES = [8, 16, 32]
 CACHE_LAYOUTS = ["NHD", "HND"]
 
diff --git a/tests/kernels/attention/test_flash_attn.py b/tests/kernels/attention/test_flash_attn.py
index bd3190d09b0f..2544703f8bf9 100644
--- a/tests/kernels/attention/test_flash_attn.py
+++ b/tests/kernels/attention/test_flash_attn.py
@@ -12,14 +12,16 @@ from vllm.vllm_flash_attn import (fa_version_unsupported_reason,
                                   flash_attn_with_kvcache,
                                   is_fa_version_supported)
 
-NUM_HEADS = [(4, 4), (8, 2), (16, 2)]
+NUM_HEADS = [(4, 4), (8, 2)]
 HEAD_SIZES = [128, 256]
-BLOCK_SIZES = [16, 32]
-DTYPES = [torch.float16, torch.bfloat16]
+BLOCK_SIZES = [16]
+DTYPES = [torch.bfloat16]
 QDTYPES = [None, torch.float8_e4m3fn]
 # one value large enough to test overflow in index calculation.
 # one value small enough to test the schema op check
 NUM_BLOCKS = [32768, 2048]
+SOFT_CAPS = [None, 50.0]
+SLIDING_WINDOWS = [None, 256]
 
 
 def ref_paged_attn(
@@ -83,9 +85,9 @@ def ref_paged_attn(
 @pytest.mark.parametrize("head_size", HEAD_SIZES)
 @pytest.mark.parametrize("block_size", BLOCK_SIZES)
 @pytest.mark.parametrize("dtype", DTYPES)
-@pytest.mark.parametrize("soft_cap", [None, 10.0, 50.0])
+@pytest.mark.parametrize("soft_cap", SOFT_CAPS)
 @pytest.mark.parametrize("num_blocks", NUM_BLOCKS)
-@pytest.mark.parametrize("sliding_window", [None, 256])
+@pytest.mark.parametrize("sliding_window", SLIDING_WINDOWS)
 @pytest.mark.parametrize("fa_version", [2, 3])
 @pytest.mark.parametrize("q_dtype", QDTYPES)
 @torch.inference_mode()
@@ -198,9 +200,9 @@ def test_flash_attn_with_paged_kv(
 @pytest.mark.parametrize("num_heads", NUM_HEADS)
 @pytest.mark.parametrize("head_size", HEAD_SIZES)
 @pytest.mark.parametrize("block_size", BLOCK_SIZES)
-@pytest.mark.parametrize("sliding_window", [None, 256])
+@pytest.mark.parametrize("sliding_window", SLIDING_WINDOWS)
 @pytest.mark.parametrize("dtype", DTYPES)
-@pytest.mark.parametrize("soft_cap", [None, 10.0, 50.0])
+@pytest.mark.parametrize("soft_cap", SOFT_CAPS)
 @pytest.mark.parametrize("num_blocks", NUM_BLOCKS)
 @pytest.mark.parametrize("fa_version", [2, 3])
 @pytest.mark.parametrize("q_dtype", QDTYPES)
diff --git a/tests/kernels/attention/test_flashinfer.py b/tests/kernels/attention/test_flashinfer.py
index 8f9b4eceaa72..be78f0e4fcc6 100644
--- a/tests/kernels/attention/test_flashinfer.py
+++ b/tests/kernels/attention/test_flashinfer.py
@@ -9,11 +9,13 @@ import torch
 
 from vllm.platforms import current_platform
 
-NUM_HEADS = [(16, 16), (32, 8), (64, 8), (6, 1)]
+NUM_HEADS = [(32, 8), (6, 1)]
 HEAD_SIZES = [128, 256]
 BLOCK_SIZES = [16, 32]
-DTYPES = [torch.float16, torch.bfloat16]
+DTYPES = [torch.bfloat16]
 NUM_BLOCKS = 32768  # Large enough to test overflow in index calculation.
+SOFT_CAPS = [None, 30.0]
+SLIDING_WINDOWS = [None, 64]
 
 
 def ref_paged_attn(
@@ -76,8 +78,8 @@ def ref_paged_attn(
 @pytest.mark.parametrize("head_size", HEAD_SIZES)
 @pytest.mark.parametrize("block_size", BLOCK_SIZES)
 @pytest.mark.parametrize("dtype", DTYPES)
-@pytest.mark.parametrize("soft_cap", [None, 30.0, 50.0])
-@pytest.mark.parametrize("sliding_window", [None, 64])
+@pytest.mark.parametrize("soft_cap", SOFT_CAPS)
+@pytest.mark.parametrize("sliding_window", SLIDING_WINDOWS)
 @torch.inference_mode
 def test_flashinfer_decode_with_paged_kv(
     kv_lens: list[int],
@@ -173,8 +175,8 @@ def test_flashinfer_decode_with_paged_kv(
 @pytest.mark.parametrize("head_size", HEAD_SIZES)
 @pytest.mark.parametrize("block_size", BLOCK_SIZES)
 @pytest.mark.parametrize("dtype", DTYPES)
-@pytest.mark.parametrize("soft_cap", [None, 30.0, 50.0])
-@pytest.mark.parametrize("sliding_window", [None, 64])
+@pytest.mark.parametrize("soft_cap", SOFT_CAPS)
+@pytest.mark.parametrize("sliding_window", SLIDING_WINDOWS)
 @torch.inference_mode
 def test_flashinfer_prefill_with_paged_kv(
     seq_lens: list[tuple[int, int]],
@@ -278,11 +280,11 @@ def test_flashinfer_prefill_with_paged_kv(
 
 
 @pytest.mark.parametrize("seq_lens", [[(1, 132), (5, 18)]])
-@pytest.mark.parametrize("num_heads", [(32, 8), (6, 1)])
+@pytest.mark.parametrize("num_heads", NUM_HEADS)
 @pytest.mark.parametrize("head_size", HEAD_SIZES)
 @pytest.mark.parametrize("block_size", BLOCK_SIZES)
 @pytest.mark.parametrize("dtype", DTYPES)
-@pytest.mark.parametrize("soft_cap", [None, 30.0, 50.0])
+@pytest.mark.parametrize("soft_cap", SOFT_CAPS)
 def test_flashinfer_prefill_with_paged_fp8_kv(
         seq_lens: list[tuple[int, int]], num_heads: tuple[int, int],
         head_size: int, dtype: torch.dtype, block_size: int,
@@ -385,11 +387,12 @@ def test_flashinfer_prefill_with_paged_fp8_kv(
 
 
 @pytest.mark.parametrize("kv_lens", [[1328, 18, 463], [1, 54, 293, 70]])
-@pytest.mark.parametrize("num_heads", [(32, 8), (64, 8), (6, 1)])
+@pytest.mark.parametrize("num_heads", NUM_HEADS)
 @pytest.mark.parametrize("head_size", HEAD_SIZES)
 @pytest.mark.parametrize("block_size", BLOCK_SIZES)
 @pytest.mark.parametrize("dtype", DTYPES)
-@pytest.mark.parametrize("soft_cap", [None, 30.0, 50.0])
+@pytest.mark.parametrize("soft_cap", SOFT_CAPS)
+@pytest.mark.skip(reason="TODO: fix the accuracy issue")
 @torch.inference_mode
 def test_flashinfer_decode_with_paged_fp8_kv(
     kv_lens: list[int],
@@ -399,7 +402,6 @@ def test_flashinfer_decode_with_paged_fp8_kv(
     block_size: int,
     soft_cap: Optional[float],
 ) -> None:
-    pytest.skip("TODO: fix the accuracy issue")
     # test doesn't work for num_heads = (16,16)
     torch.set_default_device("cuda")
     current_platform.seed_everything(0)
diff --git a/tests/kernels/attention/test_flashinfer_trtllm_attention.py b/tests/kernels/attention/test_flashinfer_trtllm_attention.py
index e87ce520bc66..53e225ea3ea6 100644
--- a/tests/kernels/attention/test_flashinfer_trtllm_attention.py
+++ b/tests/kernels/attention/test_flashinfer_trtllm_attention.py
@@ -20,11 +20,11 @@ FLOAT32_BYTES = torch.finfo(torch.float).bits // 8
 MAX_Q_LEN = 1024
 MAX_KV_LEN = 4096
 BATCH_SIZES = [4, 12]
-NUM_HEADS = [(64, 8), (16, 16), (40, 8), (32, 8)]
+NUM_HEADS = [(16, 16), (40, 8)]
 HEAD_SIZES = [128]
-BLOCK_SIZES = [16, 32]
+BLOCK_SIZES = [16]
 KV_LAYOUTS = ["HND"]
-DTYPES = [torch.float16, torch.bfloat16]
+DTYPES = [torch.bfloat16]
 KV_CACHE_DTYPES = [None, current_platform.fp8_dtype()]
 NUM_BLOCKS = 32768  # Large enough to test overflow in index calculation.
 SOFT_CAPS = [None, 50.0]
diff --git a/tests/kernels/attention/test_prefix_prefill.py b/tests/kernels/attention/test_prefix_prefill.py
index b09e1bbc4279..8544eab3accc 100644
--- a/tests/kernels/attention/test_prefix_prefill.py
+++ b/tests/kernels/attention/test_prefix_prefill.py
@@ -19,13 +19,13 @@ from vllm.platforms import current_platform
 from vllm.utils import STR_DTYPE_TO_TORCH_DTYPE
 
 NUM_HEADS = [64]
-NUM_QUERIES_PER_KV = [1, 8, 64]
-HEAD_SIZES = [128, 96, 24]
+NUM_QUERIES_PER_KV = [1, 64]
+HEAD_SIZES = [24, 128]
 DTYPES = [torch.float16]
 CUDA_DEVICES = [
     f"cuda:{i}" for i in range(1 if torch.cuda.device_count() == 1 else 2)
 ]
-SLIDING_WINDOW = [0, 16, 64, 128, 256, 512, 2048]
+SLIDING_WINDOW = [0, 16, 2048]
 KV_CACHE_DTYPES = ["auto", "fp8", "fp8_e5m2"]
 
 OPS = [chunked_prefill_paged_decode, context_attention_fwd]
diff --git a/tests/kernels/attention/test_triton_unified_attention.py b/tests/kernels/attention/test_triton_unified_attention.py
index 0cb7f5963c79..4b97d51e6ed2 100644
--- a/tests/kernels/attention/test_triton_unified_attention.py
+++ b/tests/kernels/attention/test_triton_unified_attention.py
@@ -9,11 +9,11 @@ import torch
 from vllm.attention.ops.triton_unified_attention import unified_attention
 from vllm.platforms import current_platform
 
-NUM_HEADS = [(4, 4), (8, 2), (16, 2)]
+NUM_HEADS = [(4, 4), (8, 2)]
 HEAD_SIZES = [128, 256]
-BLOCK_SIZES = [16, 32]
+BLOCK_SIZES = [16]
 
-DTYPES = [torch.float16, torch.bfloat16]
+DTYPES = [torch.bfloat16]
 QDTYPES = [None, torch.float8_e4m3fn] if not current_platform.is_rocm() else [
     None, torch.float8_e4m3fnuz
 ]
@@ -85,7 +85,7 @@ def ref_paged_attn(
 @pytest.mark.parametrize("block_size", BLOCK_SIZES)
 @pytest.mark.parametrize("sliding_window", [None, 256])
 @pytest.mark.parametrize("dtype", DTYPES)
-@pytest.mark.parametrize("soft_cap", [None, 10.0, 50.0])
+@pytest.mark.parametrize("soft_cap", [None, 50.0])
 @pytest.mark.parametrize("num_blocks", NUM_BLOCKS)
 @pytest.mark.parametrize("q_dtype", QDTYPES)
 @torch.inference_mode()