diff --git a/paddle/pten/api/lib/tensor.cc b/paddle/pten/api/lib/tensor.cc
index 2ec66803d17625c58173a595689b46aceab893cb..8a9ce5e859e3e89cc62899a64b72f6eca5c82d0b 100644
--- a/paddle/pten/api/lib/tensor.cc
+++ b/paddle/pten/api/lib/tensor.cc
@@ -283,7 +283,7 @@ template <typename T>
 Tensor Tensor::copy_to(const PlaceType &target_place) const {
   LOG(WARNING) << "The Tensor's `copy_to` method is deprecated since version "
                   "2.3, and will be removed in version 2.4, please use "
-                  "`copy_to` method without template argumentinstead. "
+                  "`copy_to` method without template argument instead. "
                   "reason: copying a Tensor to another device does not need "
                   "to specify the data type template argument.";
   return copy_to(ConvertExtPlaceToBackend(target_place), /*blocking=*/false);
diff --git a/paddle/pten/tests/api/test_cast_api.cc b/paddle/pten/tests/api/test_cast_api.cc
index 1f7c238817e9894093071df827ac8899f786409c..ef110e8e33c0331d6f06dbe36c0e161b671faa55 100644
--- a/paddle/pten/tests/api/test_cast_api.cc
+++ b/paddle/pten/tests/api/test_cast_api.cc
@@ -22,7 +22,7 @@ limitations under the License. */
 #include "paddle/pten/core/dense_tensor.h"
 #include "paddle/pten/core/kernel_registry.h"
 
-namespace pten {
+namespace paddle {
 namespace tests {
 
 namespace framework = paddle::framework;
@@ -85,4 +85,4 @@ TEST(Tensor, cast) {
 }
 
 }  // namespace tests
-}  // namespace pten
+}  // namespace paddle
diff --git a/paddle/pten/tests/api/test_dot_api.cc b/paddle/pten/tests/api/test_dot_api.cc
index e9f623096edaf22c1f26b35c0542822a86c31c0f..972e065596e31f660c89cecc968b099205fca2bd 100644
--- a/paddle/pten/tests/api/test_dot_api.cc
+++ b/paddle/pten/tests/api/test_dot_api.cc
@@ -21,6 +21,9 @@ limitations under the License. */
 #include "paddle/pten/core/dense_tensor.h"
 #include "paddle/pten/core/kernel_registry.h"
 
+namespace paddle {
+namespace tests {
+
 namespace framework = paddle::framework;
 using DDim = paddle::framework::DDim;
 
@@ -76,3 +79,6 @@ TEST(API, dot) {
   ASSERT_NEAR(expect_result[1], actual_result1, 1e-6f);
   ASSERT_NEAR(expect_result[2], actual_result2, 1e-6f);
 }
+
+}  // namespace tests
+}  // namespace paddle
diff --git a/paddle/pten/tests/api/test_elementwise_api.cc b/paddle/pten/tests/api/test_elementwise_api.cc
index be4e45370c3e7de40b732ba24b1894bbbd32e48e..795a0176c2902311936e1d730454e0e08ffaf0dd 100644
--- a/paddle/pten/tests/api/test_elementwise_api.cc
+++ b/paddle/pten/tests/api/test_elementwise_api.cc
@@ -21,6 +21,9 @@ limitations under the License. */
 #include "paddle/pten/core/dense_tensor.h"
 #include "paddle/pten/core/kernel_registry.h"
 
+namespace paddle {
+namespace tests {
+
 namespace framework = paddle::framework;
 using DDim = paddle::framework::DDim;
 
@@ -185,3 +188,6 @@ TEST(API, divide) {
   ASSERT_NEAR(expect_result[0][1], actual_result1, 1e-6f);
   ASSERT_NEAR(expect_result[1][0], actual_result2, 1e-6f);
 }
+
+}  // namespace tests
+}  // namespace paddle
diff --git a/paddle/pten/tests/api/test_fill_api.cc b/paddle/pten/tests/api/test_fill_api.cc
index 8eb698f73236141f582f3272d0abc9c2a7c5acbd..552c5e0ef9688cce3de236d3d115b881434cc44e 100644
--- a/paddle/pten/tests/api/test_fill_api.cc
+++ b/paddle/pten/tests/api/test_fill_api.cc
@@ -21,6 +21,9 @@ limitations under the License. */
 #include "paddle/pten/core/dense_tensor.h"
 #include "paddle/pten/core/kernel_registry.h"
 
+namespace paddle {
+namespace tests {
+
 namespace framework = paddle::framework;
 using DDim = paddle::framework::DDim;
 
@@ -151,3 +154,6 @@ TEST(API, full) {
     ASSERT_NEAR(actual_result[i], val, 1e-6f);
   }
 }
+
+}  // namespace tests
+}  // namespace paddle
diff --git a/paddle/pten/tests/api/test_flatten_api.cc b/paddle/pten/tests/api/test_flatten_api.cc
index ff4e16ef031a930aa9c42cef48ed2b2312f2bc2c..2fcf00efc603664fc9306236462ad6bf5c01e94e 100644
--- a/paddle/pten/tests/api/test_flatten_api.cc
+++ b/paddle/pten/tests/api/test_flatten_api.cc
@@ -21,6 +21,9 @@ limitations under the License. */
 #include "paddle/pten/core/dense_tensor.h"
 #include "paddle/pten/core/kernel_registry.h"
 
+namespace paddle {
+namespace tests {
+
 namespace framework = paddle::framework;
 using DDim = paddle::framework::DDim;
 
@@ -64,3 +67,6 @@ TEST(API, flatten) {
   }
   ASSERT_EQ(value_equal, true);
 }
+
+}  // namespace tests
+}  // namespace paddle
diff --git a/paddle/pten/tests/api/test_matmul_api.cc b/paddle/pten/tests/api/test_matmul_api.cc
index 9cf59aa20943f4ee8f5e5e01c245303cf5abbe5f..d3652db54ec5c2365164f6214143b52f58e3e293 100644
--- a/paddle/pten/tests/api/test_matmul_api.cc
+++ b/paddle/pten/tests/api/test_matmul_api.cc
@@ -22,6 +22,9 @@ limitations under the License. */
 #include "paddle/pten/core/kernel_registry.h"
 #include "paddle/pten/kernels/cuda/utils.h"
 
+namespace paddle {
+namespace tests {
+
 namespace framework = paddle::framework;
 using DDim = paddle::framework::DDim;
 
@@ -152,3 +155,6 @@ TEST(API, matmul_cuda) {
 }
 
 #endif
+
+}  // namespace tests
+}  // namespace paddle
diff --git a/paddle/pten/tests/api/test_mean_api.cc b/paddle/pten/tests/api/test_mean_api.cc
index 26b6b7301934f97ed8ceea272f5bb9224a52ac6e..aecbdddc25182f23d852055f7f7ba692e17463c9 100644
--- a/paddle/pten/tests/api/test_mean_api.cc
+++ b/paddle/pten/tests/api/test_mean_api.cc
@@ -21,6 +21,9 @@ limitations under the License. */
 #include "paddle/pten/core/dense_tensor.h"
 #include "paddle/pten/core/kernel_registry.h"
 
+namespace paddle {
+namespace tests {
+
 namespace framework = paddle::framework;
 using DDim = paddle::framework::DDim;
 
@@ -61,3 +64,6 @@ TEST(API, mean) {
   auto actual_result = dense_out->data<float>()[0];
   ASSERT_NEAR(expect_result, actual_result, 1e-6f);
 }
+
+}  // namespace tests
+}  // namespace paddle
diff --git a/paddle/pten/tests/api/test_pten_exception.cc b/paddle/pten/tests/api/test_pten_exception.cc
index a987e9bc315455922f4fd06c0e61e62171294c33..1096d719c2207d25c2dbedfbf62690d29c5d00e9 100644
--- a/paddle/pten/tests/api/test_pten_exception.cc
+++ b/paddle/pten/tests/api/test_pten_exception.cc
@@ -14,6 +14,9 @@ limitations under the License. */
 #include "gtest/gtest.h"
 #include "paddle/pten/api/ext/exception.h"
 
+namespace paddle {
+namespace tests {
+
 TEST(PD_THROW, empty) {
   bool caught_exception = false;
   try {
@@ -23,12 +26,11 @@ TEST(PD_THROW, empty) {
     std::string err_msg = e.what();
     EXPECT_TRUE(err_msg.find("An error occurred.") != std::string::npos);
 #if _WIN32
-    EXPECT_TRUE(err_msg.find("tests\\api\\test_pten_exception.cc:20") !=
+    EXPECT_TRUE(err_msg.find("tests\\api\\test_pten_exception.cc") !=
                 std::string::npos);
 #else
-    EXPECT_TRUE(
-        err_msg.find("paddle/pten/tests/api/test_pten_exception.cc:20") !=
-        std::string::npos);
+    EXPECT_TRUE(err_msg.find("paddle/pten/tests/api/test_pten_exception.cc") !=
+                std::string::npos);
 #endif
   }
   EXPECT_TRUE(caught_exception);
@@ -156,3 +158,6 @@ TEST(PD_CHECK, FAILED) {
   }
   EXPECT_TRUE(caught_exception);
 }
+
+}  // namespace tests
+}  // namespace paddle
diff --git a/paddle/pten/tests/api/test_pten_tensor.cc b/paddle/pten/tests/api/test_pten_tensor.cc
index 9cadd2664bdf3c6f2ad6db84279752a3add9271d..8cdd769558fbb824e9b1678373d25f72dac6fec0 100644
--- a/paddle/pten/tests/api/test_pten_tensor.cc
+++ b/paddle/pten/tests/api/test_pten_tensor.cc
@@ -17,7 +17,7 @@
 #include "paddle/pten/api/include/tensor.h"
 #include "paddle/pten/api/lib/ext_compat_utils.h"
 
-namespace pten {
+namespace paddle {
 namespace tests {
 
 template <typename T>
@@ -224,4 +224,4 @@ TEST(PtenTensor, All) {
 }
 
 }  // namespace tests
-}  // namespace pten
+}  // namespace paddle
diff --git a/paddle/pten/tests/api/test_reshape_api.cc b/paddle/pten/tests/api/test_reshape_api.cc
index 719bc4a3f0039e6a21f3dd82d945a147f64e67d0..643551ec1cb1d793f5e9cd02871afa9c51263426 100644
--- a/paddle/pten/tests/api/test_reshape_api.cc
+++ b/paddle/pten/tests/api/test_reshape_api.cc
@@ -27,7 +27,7 @@ PT_DECLARE_MODULE(ManipulationCPU);
 PT_DECLARE_MODULE(ManipulationCUDA);
 #endif
 
-namespace pten {
+namespace paddle {
 namespace tests {
 
 namespace framework = paddle::framework;
@@ -86,4 +86,4 @@ TEST(Tensor, old_reshape) {
 }
 
 }  // namespace tests
-}  // namespace pten
+}  // namespace paddle
diff --git a/paddle/pten/tests/api/test_slice_api.cc b/paddle/pten/tests/api/test_slice_api.cc
index 03d4b1420807ebf9eee1173aead220d96c9d4122..31a96c392dc1d7924b058e03ae97072b9c1760e4 100644
--- a/paddle/pten/tests/api/test_slice_api.cc
+++ b/paddle/pten/tests/api/test_slice_api.cc
@@ -19,7 +19,7 @@ limitations under the License. */
 #include "paddle/pten/api/include/tensor.h"
 #include "paddle/pten/core/kernel_registry.h"
 
-namespace pten {
+namespace paddle {
 namespace tests {
 
 TEST(Tensor, slice) {
@@ -41,4 +41,4 @@ TEST(Tensor, slice) {
 }
 
 }  // namespace tests
-}  // namespace pten
+}  // namespace paddle
diff --git a/paddle/pten/tests/api/test_storage.cc b/paddle/pten/tests/api/test_storage.cc
index fc95f95f26e0b0099ad6b8a88529433eb5386b54..1a5d95f9419c5b8068448184abfce72582032b53 100644
--- a/paddle/pten/tests/api/test_storage.cc
+++ b/paddle/pten/tests/api/test_storage.cc
@@ -20,13 +20,12 @@ limitations under the License. */
 #include "paddle/pten/api/lib/utils/storage.h"
 
 namespace paddle {
-namespace experimental {
 namespace tests {
 
 TEST(host_storage, external_stroage) {
   const size_t size{100};
-  const auto a =
-      std::make_shared<DefaultAllocator>(paddle::platform::CPUPlace());
+  const auto a = std::make_shared<experimental::DefaultAllocator>(
+      paddle::platform::CPUPlace());
   pten::intrusive_ptr<pten::Storage> in_storage =
       pten::make_intrusive<pten::TensorStorage>(a, size);
   char* data = static_cast<char*>(in_storage->data());
@@ -35,7 +34,8 @@ TEST(host_storage, external_stroage) {
   }
   const size_t delta{1};
   const size_t n{10};
-  auto ex_storage = pten::make_intrusive<ExternalStorage>(in_storage, delta, n);
+  auto ex_storage =
+      pten::make_intrusive<experimental::ExternalStorage>(in_storage, delta, n);
   CHECK_EQ(ex_storage->size(), n);
   CHECK(paddle::platform::is_cpu_place(ex_storage->place()));
   CHECK(!ex_storage->OwnsMemory());
@@ -51,7 +51,7 @@ TEST(host_storage, external_vector) {
   }
   const size_t delta{1};
   const size_t n{10};
-  auto ex_storage = pten::make_intrusive<ExternalStorage>(
+  auto ex_storage = pten::make_intrusive<experimental::ExternalStorage>(
       data.data(), n, paddle::platform::CPUPlace());
   CHECK_EQ(ex_storage->size(), n);
   CHECK(paddle::platform::is_cpu_place(ex_storage->place()));
@@ -60,6 +60,6 @@ TEST(host_storage, external_vector) {
     CHECK_EQ(data[i], static_cast<char>(i));
   }
 }
+
 }  // namespace tests
-}  // namespace experimental
 }  // namespace paddle
diff --git a/paddle/pten/tests/api/test_tensor_utils.cc b/paddle/pten/tests/api/test_tensor_utils.cc
index cebb0fc07ee6363b305eba1f1e26be7b1ea2258f..c445e1867924ac88a4dd6524546735b8e84fe3e4 100644
--- a/paddle/pten/tests/api/test_tensor_utils.cc
+++ b/paddle/pten/tests/api/test_tensor_utils.cc
@@ -17,7 +17,6 @@ limitations under the License. */
 #include "paddle/pten/api/lib/utils/tensor_utils.h"
 
 namespace paddle {
-namespace experimental {
 namespace tests {
 
 using DDim = paddle::framework::DDim;
@@ -34,7 +33,8 @@ TEST(tensor_utils, dense_tensor_to_lod_tensor) {
   const std::vector<std::vector<size_t>> lod{{0, 2}};
   DenseTensorMeta meta(dtype, dims, layout, lod);
 
-  auto alloc = std::make_shared<DefaultAllocator>(platform::CPUPlace());
+  auto alloc =
+      std::make_shared<experimental::DefaultAllocator>(platform::CPUPlace());
 
   DenseTensor dense_tensor(alloc, meta);
   float* data = dense_tensor.mutable_data<float>();
@@ -42,7 +42,7 @@ TEST(tensor_utils, dense_tensor_to_lod_tensor) {
   data[1] = 2.1f;
 
   framework::LoDTensor lod_tensor;
-  MovesStorage(&dense_tensor, &lod_tensor);
+  experimental::MovesStorage(&dense_tensor, &lod_tensor);
 
   CHECK(dense_tensor.lod().size() == lod_tensor.lod().size());
   CHECK(dense_tensor.lod()[0] ==
@@ -55,7 +55,7 @@ TEST(tensor_utils, dense_tensor_to_lod_tensor) {
   CHECK(lod_tensor.data<float>()[0] == 1.0f);
   CHECK(lod_tensor.data<float>()[1] == 2.1f);
 
-  auto dense_tensor_1 = MakePtenDenseTensor(lod_tensor);
+  auto dense_tensor_1 = experimental::MakePtenDenseTensor(lod_tensor);
   CHECK(dense_tensor_1->dims() == dims);
   CHECK(dense_tensor_1->dtype() == dtype);
   CHECK(dense_tensor_1->layout() == layout);
@@ -72,7 +72,8 @@ TEST(tensor_utils, dense_tensor_to_tensor) {
   const DataLayout layout{DataLayout::NCHW};
   DenseTensorMeta meta(dtype, dims, layout);
 
-  auto alloc = std::make_shared<DefaultAllocator>(platform::CPUPlace());
+  auto alloc =
+      std::make_shared<experimental::DefaultAllocator>(platform::CPUPlace());
 
   DenseTensor dense_tensor(alloc, meta);
   float* data = dense_tensor.mutable_data<float>();
@@ -80,7 +81,7 @@ TEST(tensor_utils, dense_tensor_to_tensor) {
   data[1] = 2.1f;
 
   framework::Tensor tensor;
-  MovesStorage(&dense_tensor, &tensor);
+  experimental::MovesStorage(&dense_tensor, &tensor);
 
   CHECK(dense_tensor.dtype() == pten::TransToPtenDataType(tensor.type()));
   CHECK(dense_tensor.layout() == pten::TransToPtenDataLayout(tensor.layout()));
@@ -89,7 +90,7 @@ TEST(tensor_utils, dense_tensor_to_tensor) {
   CHECK(tensor.data<float>()[0] == 1.0f);
   CHECK(tensor.data<float>()[1] == 2.1f);
 
-  auto dense_tensor_1 = MakePtenDenseTensor(tensor);
+  auto dense_tensor_1 = experimental::MakePtenDenseTensor(tensor);
   CHECK(dense_tensor_1->dims() == dims);
   CHECK(dense_tensor_1->dtype() == dtype);
   CHECK(dense_tensor_1->layout() == layout);
@@ -114,11 +115,10 @@ TEST(PtenUtils, VarToPtTensor) {
   auto tensor_def = pten::TensorArgDef(
       expect_backend, pten::DataLayout::NCHW, pten::DataType::INT32);
   // 2. test API
-  auto tensor_x = MakePtenTensorBaseFromVar(v, tensor_def);
+  auto tensor_x = experimental::MakePtenTensorBaseFromVar(v, tensor_def);
   // 3. check result
   ASSERT_EQ(tensor_x->dtype(), pten::DataType::INT32);
 }
 
 }  // namespace tests
-}  // namespace experimental
 }  // namespace paddle
diff --git a/paddle/pten/tests/api/test_to_api.cc b/paddle/pten/tests/api/test_to_api.cc
index d08a78cf4cf823a1807c816dc928204ef5760bc8..5bb6f386c7eb124ab9ddac0f641bafa2c56e6e11 100644
--- a/paddle/pten/tests/api/test_to_api.cc
+++ b/paddle/pten/tests/api/test_to_api.cc
@@ -21,7 +21,7 @@ limitations under the License. */
 #include "paddle/pten/core/dense_tensor.h"
 #include "paddle/pten/core/kernel_registry.h"
 
-namespace pten {
+namespace paddle {
 namespace tests {
 
 namespace framework = paddle::framework;
@@ -107,4 +107,4 @@ TEST(Tensor, old_copy_to) {
 }
 
 }  // namespace tests
-}  // namespace pten
+}  // namespace paddle
diff --git a/paddle/pten/tests/common/test_backend.cc b/paddle/pten/tests/common/test_backend.cc
index 0aabf22608f69bd4fd661f005e7796b65f51f0d3..148785d4b630b1f02438ee867d47d704bbe4730f 100644
--- a/paddle/pten/tests/common/test_backend.cc
+++ b/paddle/pten/tests/common/test_backend.cc
@@ -18,6 +18,9 @@ limitations under the License. */
 #include "paddle/pten/api/ext/exception.h"
 #include "paddle/pten/common/backend.h"
 
+namespace pten {
+namespace tests {
+
 TEST(Backend, OStream) {
   std::ostringstream oss;
   oss << pten::Backend::UNDEFINED;
@@ -48,3 +51,6 @@ TEST(Backend, OStream) {
     EXPECT_TRUE(ex_msg.find("Invalid enum backend type") != std::string::npos);
   }
 }
+
+}  // namespace tests
+}  // namespace pten
diff --git a/paddle/pten/tests/common/test_data_layout.cc b/paddle/pten/tests/common/test_data_layout.cc
index 4de75a7bd71fb7d9f96d6ac94dc6f2abaafefa23..22c503b5917175b3e83ee5d17aa7ca9116921d7e 100644
--- a/paddle/pten/tests/common/test_data_layout.cc
+++ b/paddle/pten/tests/common/test_data_layout.cc
@@ -19,6 +19,9 @@ limitations under the License. */
 #include "paddle/pten/api/ext/exception.h"
 #include "paddle/pten/common/layout.h"
 
+namespace pten {
+namespace tests {
+
 TEST(DataLayout, OStream) {
   std::ostringstream oss;
   oss << pten::DataLayout::UNDEFINED;
@@ -44,3 +47,6 @@ TEST(DataLayout, OStream) {
                 std::string::npos);
   }
 }
+
+}  // namespace tests
+}  // namespace pten
diff --git a/paddle/pten/tests/common/test_data_type.cc b/paddle/pten/tests/common/test_data_type.cc
index 95957260de545733b2dbcde09ba344c52802b803..2f1d2ff86b7215a12b16e0af9b16dcfeb575b196 100644
--- a/paddle/pten/tests/common/test_data_type.cc
+++ b/paddle/pten/tests/common/test_data_type.cc
@@ -19,6 +19,9 @@ limitations under the License. */
 #include "paddle/pten/api/ext/exception.h"
 #include "paddle/pten/common/data_type.h"
 
+namespace pten {
+namespace tests {
+
 TEST(DataType, OStream) {
   std::ostringstream oss;
   oss << pten::DataType::UNDEFINED;
@@ -67,3 +70,6 @@ TEST(DataType, OStream) {
     EXPECT_TRUE(ex_msg.find("Invalid enum data type") != std::string::npos);
   }
 }
+
+}  // namespace tests
+}  // namespace pten
diff --git a/paddle/pten/tests/core/test_kernel_factory.cc b/paddle/pten/tests/core/test_kernel_factory.cc
index c1c17171b5898cc2e197bf70f8410a157384a046..5ee4b17c9d676ef3bdafb761208e93b8e6e7a008 100644
--- a/paddle/pten/tests/core/test_kernel_factory.cc
+++ b/paddle/pten/tests/core/test_kernel_factory.cc
@@ -19,6 +19,9 @@ limitations under the License. */
 
 #include "gtest/gtest.h"
 
+namespace pten {
+namespace tests {
+
 // TODO(chenweihang): add more unittests later
 
 TEST(KernelName, ConstructAndOStream) {
@@ -45,3 +48,6 @@ TEST(KernelKey, ConstructAndOStream) {
   // EXPECT_EQ(oss.str(), "scale.host");
   oss.flush();
 }
+
+}  // namespace tests
+}  // namespace pten
diff --git a/paddle/pten/tests/kernels/test_cast_dev_api.cc b/paddle/pten/tests/kernels/test_cast_dev_api.cc
index 64b60a540f7ebcdd1a311cdcaa4aa367186bed28..5bbaf2a2c373d2462cafa58eb7cef6a281a31615 100644
--- a/paddle/pten/tests/kernels/test_cast_dev_api.cc
+++ b/paddle/pten/tests/kernels/test_cast_dev_api.cc
@@ -23,6 +23,9 @@ limitations under the License. */
 #include "paddle/pten/core/dense_tensor.h"
 #include "paddle/pten/core/kernel_registry.h"
 
+namespace pten {
+namespace tests {
+
 namespace framework = paddle::framework;
 using DDim = paddle::framework::DDim;
 
@@ -66,3 +69,6 @@ TEST(DEV_API, cast) {
     ASSERT_NEAR(actual_result[i], static_cast<double>(dense_x_data[i]), 1e-6f);
   }
 }
+
+}  // namespace tests
+}  // namespace pten
diff --git a/paddle/pten/tests/kernels/test_copy_dev_api.cc b/paddle/pten/tests/kernels/test_copy_dev_api.cc
index 16192be0e1c9297d9b007c952560e5af6e3e7453..9cc994c569553791dc51a4fea97a267d4b73c5c2 100644
--- a/paddle/pten/tests/kernels/test_copy_dev_api.cc
+++ b/paddle/pten/tests/kernels/test_copy_dev_api.cc
@@ -21,6 +21,9 @@ limitations under the License. */
 #include "paddle/pten/api/lib/utils/allocator.h"
 #include "paddle/pten/core/dense_tensor.h"
 
+namespace pten {
+namespace tests {
+
 namespace framework = paddle::framework;
 using DDim = paddle::framework::DDim;
 
@@ -61,3 +64,6 @@ TEST(DEV_API, copy) {
     ASSERT_EQ(dense_src->data<float>()[i], dense_dst->data<float>()[i]);
   }
 }
+
+}  // namespace tests
+}  // namespace pten
diff --git a/paddle/pten/tests/kernels/test_dot_dev_api.cc b/paddle/pten/tests/kernels/test_dot_dev_api.cc
index 5485ef2843c2ca7ab7567f0f95ca0c91e9ddbb8f..3fda81d3b5eae1979f9a6300e048bd210ef7224d 100644
--- a/paddle/pten/tests/kernels/test_dot_dev_api.cc
+++ b/paddle/pten/tests/kernels/test_dot_dev_api.cc
@@ -21,6 +21,9 @@ limitations under the License. */
 #include "paddle/pten/core/dense_tensor.h"
 #include "paddle/pten/core/kernel_registry.h"
 
+namespace pten {
+namespace tests {
+
 namespace framework = paddle::framework;
 using DDim = paddle::framework::DDim;
 
@@ -73,3 +76,6 @@ TEST(DEV_API, dot) {
   ASSERT_NEAR(expect_result[1], actual_result1, 1e-6f);
   ASSERT_NEAR(expect_result[2], actual_result2, 1e-6f);
 }
+
+}  // namespace tests
+}  // namespace pten
diff --git a/paddle/pten/tests/kernels/test_elementwise_dev_api.cc b/paddle/pten/tests/kernels/test_elementwise_dev_api.cc
index 6e9c25e23f0d00d26c6d34bed5e4be845198d46d..b22a37f1bb20f99b96db93f85b5c20a1179d5d5a 100644
--- a/paddle/pten/tests/kernels/test_elementwise_dev_api.cc
+++ b/paddle/pten/tests/kernels/test_elementwise_dev_api.cc
@@ -21,6 +21,9 @@ limitations under the License. */
 #include "paddle/pten/core/dense_tensor.h"
 #include "paddle/pten/core/kernel_registry.h"
 
+namespace pten {
+namespace tests {
+
 namespace framework = paddle::framework;
 using DDim = paddle::framework::DDim;
 
@@ -182,3 +185,6 @@ TEST(DEV_API, divide) {
   ASSERT_NEAR(expect_result[0][1], actual_result1, 1e-6f);
   ASSERT_NEAR(expect_result[1][0], actual_result2, 1e-6f);
 }
+
+}  // namespace tests
+}  // namespace pten
diff --git a/paddle/pten/tests/kernels/test_fill_dev_api.cc b/paddle/pten/tests/kernels/test_fill_dev_api.cc
index aa66877881b66c69d7c6548af77a01e23fa9bff3..90a16e3c4689e8e9a0d94e169c6e3aa4031daf98 100644
--- a/paddle/pten/tests/kernels/test_fill_dev_api.cc
+++ b/paddle/pten/tests/kernels/test_fill_dev_api.cc
@@ -21,6 +21,9 @@ limitations under the License. */
 #include "paddle/pten/core/dense_tensor.h"
 #include "paddle/pten/core/kernel_registry.h"
 
+namespace pten {
+namespace tests {
+
 namespace framework = paddle::framework;
 using DDim = paddle::framework::DDim;
 
@@ -58,3 +61,6 @@ TEST(DEV_API, fill_any_like) {
     ASSERT_NEAR(actual_result[i], val, 1e-6f);
   }
 }
+
+}  // namespace tests
+}  // namespace pten
diff --git a/paddle/pten/tests/kernels/test_flatten_dev_api.cc b/paddle/pten/tests/kernels/test_flatten_dev_api.cc
index a9be6108d24b6145e4b5d598e0d2fd8be1883735..a351be3cf664ad9100b61ad678abcd9caab4bcb8 100644
--- a/paddle/pten/tests/kernels/test_flatten_dev_api.cc
+++ b/paddle/pten/tests/kernels/test_flatten_dev_api.cc
@@ -21,6 +21,9 @@ limitations under the License. */
 #include "paddle/pten/core/dense_tensor.h"
 #include "paddle/pten/core/kernel_registry.h"
 
+namespace pten {
+namespace tests {
+
 namespace framework = paddle::framework;
 using DDim = paddle::framework::DDim;
 
@@ -67,3 +70,6 @@ TEST(DEV_API, flatten) {
   }
   ASSERT_EQ(value_equal, true);
 }
+
+}  // namespace tests
+}  // namespace pten
diff --git a/paddle/pten/tests/kernels/test_mean_dev_api.cc b/paddle/pten/tests/kernels/test_mean_dev_api.cc
index b16d339e18af344b9020c2bf0a4adaf359b017b4..4dd3f0227d9d55e15a3c87d1b5fc83e9e8fe3747 100644
--- a/paddle/pten/tests/kernels/test_mean_dev_api.cc
+++ b/paddle/pten/tests/kernels/test_mean_dev_api.cc
@@ -21,6 +21,9 @@ limitations under the License. */
 #include "paddle/pten/core/dense_tensor.h"
 #include "paddle/pten/core/kernel_registry.h"
 
+namespace pten {
+namespace tests {
+
 namespace framework = paddle::framework;
 using DDim = paddle::framework::DDim;
 
@@ -56,3 +59,6 @@ TEST(DEV_API, mean) {
   auto actual_result = out.data<float>()[0];
   ASSERT_NEAR(expect_result, actual_result, 1e-6f);
 }
+
+}  // namespace tests
+}  // namespace pten
diff --git a/paddle/pten/tests/kernels/test_reshape_dev_api.cc b/paddle/pten/tests/kernels/test_reshape_dev_api.cc
index b227d3b009e89a325dd518e85e9071d422d44d7c..64efdc6f67201cbe136dfb618bf163b25e305480 100644
--- a/paddle/pten/tests/kernels/test_reshape_dev_api.cc
+++ b/paddle/pten/tests/kernels/test_reshape_dev_api.cc
@@ -21,6 +21,9 @@ limitations under the License. */
 #include "paddle/pten/core/dense_tensor.h"
 #include "paddle/pten/core/kernel_registry.h"
 
+namespace pten {
+namespace tests {
+
 namespace framework = paddle::framework;
 using DDim = paddle::framework::DDim;
 
@@ -65,3 +68,6 @@ TEST(DEV_API, reshape) {
   }
   ASSERT_EQ(value_equal, true);
 }
+
+}  // namespace tests
+}  // namespace pten
diff --git a/paddle/pten/tests/kernels/test_scale_dev_api.cc b/paddle/pten/tests/kernels/test_scale_dev_api.cc
index b87692137251a9609336247fb63dfeda17c725eb..ac2922b36f2059f81a1233e94d575dafa2011745 100644
--- a/paddle/pten/tests/kernels/test_scale_dev_api.cc
+++ b/paddle/pten/tests/kernels/test_scale_dev_api.cc
@@ -21,6 +21,9 @@ limitations under the License. */
 #include "paddle/pten/core/dense_tensor.h"
 #include "paddle/pten/core/kernel_registry.h"
 
+namespace pten {
+namespace tests {
+
 namespace framework = paddle::framework;
 using DDim = paddle::framework::DDim;
 
@@ -108,3 +111,6 @@ TEST(DEV_API, scale_host) {
   auto actual_result = out.data<float>()[11];
   ASSERT_NEAR(expect_result, actual_result, 1e-6f);
 }
+
+}  // namespace tests
+}  // namespace pten