diff --git a/tests/ut/ge/hybrid/node_executor/aicpu/aicpu_node_executor_unittest.cc b/tests/ut/ge/hybrid/node_executor/aicpu/aicpu_node_executor_unittest.cc
index d8d39e11..153dda85 100644
--- a/tests/ut/ge/hybrid/node_executor/aicpu/aicpu_node_executor_unittest.cc
+++ b/tests/ut/ge/hybrid/node_executor/aicpu/aicpu_node_executor_unittest.cc
@@ -151,16 +151,15 @@ TEST_F(UtestAicpuNodeExecutor, aicpu_tf_node_task) {
   domi::KernelExDef *kernel_def = task_def2.mutable_kernel();
   kernel_def->set_args(reinterpret_cast<const char *>(&args), args.head.length);
   kernel_def->set_args_size(args.head.length);
-  AicpuExtInfo aicpu_ext_info;
-  aicpu_ext_info.infoType = aicpu::FWKAdapter::FWK_ADPT_EXT_SHAPE_TYPE;
-  aicpu_ext_info.infoLen = sizeof(int32_t);
+  AicpuExtInfo aicpu_ext_info2;
+  aicpu_ext_info2.infoType = aicpu::FWKAdapter::FWK_ADPT_EXT_SHAPE_TYPE;
+  aicpu_ext_info2.infoLen = sizeof(int32_t);
   int32_t type = node_item->shape_inference_type;
-  memcpy_s(aicpu_ext_info.infoMsg, sizeof(int32_t), &type, sizeof(int32_t));
-  char *ext_mem = (char*)malloc(sizeof(AicpuExtInfo) + sizeof(int32_t));
-  memcpy_s(ext_mem, sizeof(AicpuExtInfo) + sizeof(int32_t), &aicpu_ext_info, sizeof(AicpuExtInfo) + sizeof(int32_t));
-  std::string ext_info(ext_mem, sizeof(AicpuExtInfo) + sizeof(int32_t));
-  kernel_def->set_kernel_ext_info(ext_info.c_str(), ext_info.length());
-  kernel_def->set_kernel_ext_info_size(ext_info.length());
+  memcpy_s(aicpu_ext_info2.infoMsg, sizeof(int32_t), &type, sizeof(int32_t));
+  char *ext_mem2 = (char*)malloc(sizeof(AicpuExtInfo) + sizeof(int32_t));
+  memcpy_s(ext_mem2, sizeof(AicpuExtInfo) + sizeof(int32_t), &aicpu_ext_info2, sizeof(AicpuExtInfo) + sizeof(int32_t));
+  kernel_def->set_kernel_ext_info(ext_mem2, sizeof(AicpuExtInfo) + sizeof(int32_t));
+  kernel_def->set_kernel_ext_info_size(sizeof(AicpuExtInfo) + sizeof(int32_t));
   hybrid_model.task_defs_[node] = std::vector<domi::TaskDef>({task_def2, task_def2});
 
   AicpuNodeTask aicpu_node_task(node_item, task_def2);