diff --git a/tensorrt_llm/_torch/pyexecutor/model_engine.py b/tensorrt_llm/_torch/pyexecutor/model_engine.py
index 50aa317e9e43..f4875bc0d105 100644
--- a/tensorrt_llm/_torch/pyexecutor/model_engine.py
+++ b/tensorrt_llm/_torch/pyexecutor/model_engine.py
@@ -811,8 +811,6 @@ def __init__(
 
         self.kv_cache_dtype_byte_size = self.get_kv_cache_dtype_byte_size()
 
-        self._prepare_inputs_event: Optional[torch.cuda.Event] = None
-
         # Cache for enc-dec cross-attention stable generation steps.
         # Populated on the first CUDA-graph generation step; cleared whenever
         # the batch composition changes (new encoder request arrives).
@@ -6154,8 +6152,6 @@ def forward(self,
                 new_tensors_device, cache_indirection_buffer,
                 num_accepted_tokens_device, req_id_to_old_request,
                 resource_manager, can_run_graph)
-            self._prepare_inputs_event = torch.cuda.Event()
-            self._prepare_inputs_event.record()
 
             with with_shared_pool(self.cuda_graph_runner.get_graph_pool()):
                 if not can_run_graph:
@@ -6657,11 +6653,3 @@ def _execute_logit_post_processors(self,
                                                   logits_tensor, beam_width,
                                                   token_ids, logits_row_offset)
                 logits_row_offset += beam_width
-
-    def wait_for_input_copy(self):
-        """
-        Wait for input preparation and H2D copy of previous iteration before modifying host input,
-        otherwise the input of previous iteration will be overwritten.
-        """
-        if self._prepare_inputs_event is not None:
-            self._prepare_inputs_event.synchronize()
diff --git a/tests/integration/test_lists/waives.txt b/tests/integration/test_lists/waives.txt
index 6dc4776bb633..a77d9245715b 100644
--- a/tests/integration/test_lists/waives.txt
+++ b/tests/integration/test_lists/waives.txt
@@ -32,7 +32,6 @@ accuracy/test_llm_api_pytorch.py::TestDeepSeekV32::test_fp8_blockscale[baseline]
 accuracy/test_llm_api_pytorch.py::TestDeepSeekV32::test_nvfp4_multi_gpus_piecewise_cuda_graph[mtp3_fp8kv_chunked] SKIP (https://nvbugs/5989920)
 accuracy/test_llm_api_pytorch.py::TestDeepSeekV3Lite::test_bfloat16[mtp_nextn=0-attention_dp=True-cuda_graph=False-overlap_scheduler=False-torch_compile=True-enable_chunked_prefill=False-v2_kv_cache=True] SKIP (https://nvbugs/6305404)
 accuracy/test_llm_api_pytorch.py::TestDeepSeekV3Lite::test_bfloat16[mtp_nextn=2-attention_dp=True-cuda_graph=True-overlap_scheduler=True-torch_compile=False-enable_chunked_prefill=False-v2_kv_cache=True] SKIP (https://nvbugs/6426847)
-accuracy/test_llm_api_pytorch.py::TestDeepSeekV3Lite::test_bfloat16_4gpus[ep4-mtp_nextn=2-attention_dp=True-cuda_graph=True-overlap_scheduler=True-torch_compile=True] SKIP (https://nvbugs/6402058)
 accuracy/test_llm_api_pytorch.py::TestDeepSeekV3Lite::test_bfloat16_4gpus[pp4-mtp_nextn=0-attention_dp=False-cuda_graph=False-overlap_scheduler=False-torch_compile=False] SKIP (https://nvbugs/6278337)
 accuracy/test_llm_api_pytorch.py::TestDeepSeekV3Lite::test_bfloat16_4gpus[pp4-mtp_nextn=0-attention_dp=False-cuda_graph=False-overlap_scheduler=False-torch_compile=True] SKIP (https://nvbugs/6428057)
 accuracy/test_llm_api_pytorch.py::TestDeepSeekV3Lite::test_bfloat16_4gpus[pp4-mtp_nextn=0-attention_dp=False-cuda_graph=True-overlap_scheduler=False-torch_compile=False] SKIP (https://nvbugs/6278337)