diff --git a/paddle/capi/tests/test_Arguments.cpp b/paddle/capi/tests/test_Arguments.cpp
index f56391d51e32aad02289938e764b1e9f9fd41831..012901a49168e4fb3bda1e64e7fb5f2b252bd4bd 100644
--- a/paddle/capi/tests/test_Arguments.cpp
+++ b/paddle/capi/tests/test_Arguments.cpp
@@ -29,6 +29,7 @@ static std::vector<paddle_real> randomBuffer(size_t bufSize) {
 }
 
 TEST(CAPIArguments, create) {
+  //! TODO(yuyang18): Test GPU Code.
   paddle_arguments args = paddle_arguments_create_none();
   uint64_t size;
   ASSERT_EQ(kPD_NO_ERROR, paddle_arguments_size(args, &size));
diff --git a/paddle/capi/tests/test_GradientMachine.cpp b/paddle/capi/tests/test_GradientMachine.cpp
index be7dfadddc35e820b48945eab8caf919fe839e9d..6c8d74c90b25d963ab2d47777d4dede59b362b08 100644
--- a/paddle/capi/tests/test_GradientMachine.cpp
+++ b/paddle/capi/tests/test_GradientMachine.cpp
@@ -33,6 +33,7 @@ static std::vector<paddle_real> randomBuffer(size_t bufSize) {
 }
 
 TEST(GradientMachine, testPredict) {
+  //! TODO(yuyang18): Test GPU Code.
   paddle::TrainerConfigHelper config("./test_predict_network.py");
   std::string buffer;
   ASSERT_TRUE(config.getModelConfig().SerializeToString(&buffer));
diff --git a/paddle/capi/tests/test_Matrix.cpp b/paddle/capi/tests/test_Matrix.cpp
index 71dc2064dd02dcd579eca1d75d4f8defb7ce094c..4bf9a9d6a9f9161561e9e5612edd2c93cab7ac5b 100644
--- a/paddle/capi/tests/test_Matrix.cpp
+++ b/paddle/capi/tests/test_Matrix.cpp
@@ -16,6 +16,7 @@ limitations under the License. */
 #include "gtest/gtest.h"
 
 TEST(CAPIMatrix, create) {
+  //! TODO(yuyang18): Test GPU Code.
   paddle_matrix mat = paddle_matrix_create(128, 32, false);
   std::vector<paddle_real> sampleRow;
   sampleRow.resize(32);
diff --git a/paddle/capi/tests/test_Vector.cpp b/paddle/capi/tests/test_Vector.cpp
index c5c57b7288d24b25abaabb57f9c369782f6be338..365160dc9a08e6b6fc07fb685d5149d1e078da9b 100644
--- a/paddle/capi/tests/test_Vector.cpp
+++ b/paddle/capi/tests/test_Vector.cpp
@@ -16,6 +16,7 @@ limitations under the License. */
 #include "gtest/gtest.h"
 
 TEST(CAPIVector, create) {
+  //! TODO(yuyang18): Test GPU Code.
   paddle_ivector vec;
   int array[3] = {1, 2, 3};
   vec = paddle_ivector_create(array, 3, true, false);