diff --git a/paddle/framework/op_registry_test.cc b/paddle/framework/op_registry_test.cc
index ec7430a95fa5d42ba5212b4687f970e5a26e6fdd..a52dbf13af763d15c3ea3914ea66f6293b6df7ce 100644
--- a/paddle/framework/op_registry_test.cc
+++ b/paddle/framework/op_registry_test.cc
@@ -68,11 +68,8 @@ REGISTER_OP(my_test_op, paddle::framework::MyTestOp,
 TEST(OpRegistry, CreateOp) {
   paddle::framework::OpDesc op_desc;
   op_desc.set_type("cos_sim");
-  auto* input = op_desc.add_inputs();
-  ConstructVars("input", {"aa"}, input);
-
-  auto* output = op_desc.add_outputs();
-  ConstructVars("output", {"bb"}, output);
+  ConstructVars("input", {"aa"}, op_desc.add_inputs());
+  ConstructVars("output", {"bb"}, op_desc.add_outputs());
 
   float scale = 3.3;
   auto attr = op_desc.mutable_attrs()->Add();
@@ -92,11 +89,8 @@ TEST(OpRegistry, CreateOp) {
 TEST(OpRegistry, IllegalAttr) {
   paddle::framework::OpDesc op_desc;
   op_desc.set_type("cos_sim");
-  auto* input = op_desc.add_inputs();
-  ConstructVars("input", {"aa"}, input);
-
-  auto* output = op_desc.add_outputs();
-  ConstructVars("output", {"bb"}, output);
+  ConstructVars("input", {"aa"}, op_desc.add_inputs());
+  ConstructVars("output", {"bb"}, op_desc.add_outputs());
 
   auto attr = op_desc.mutable_attrs()->Add();
   attr->set_name("scale");
@@ -120,11 +114,8 @@ TEST(OpRegistry, IllegalAttr) {
 TEST(OpRegistry, DefaultValue) {
   paddle::framework::OpDesc op_desc;
   op_desc.set_type("cos_sim");
-  auto* input = op_desc.add_inputs();
-  ConstructVars("input", {"aa"}, input);
-
-  auto* output = op_desc.add_outputs();
-  ConstructVars("output", {"bb"}, output);
+  ConstructVars("input", {"aa"}, op_desc.add_inputs());
+  ConstructVars("output", {"bb"}, op_desc.add_outputs());
 
   ASSERT_TRUE(op_desc.IsInitialized());
 
@@ -139,11 +130,8 @@ TEST(OpRegistry, DefaultValue) {
 TEST(OpRegistry, CustomChecker) {
   paddle::framework::OpDesc op_desc;
   op_desc.set_type("my_test_op");
-  auto* input = op_desc.add_inputs();
-  ConstructVars("input", {"ii"}, input);
-
-  auto* output = op_desc.add_outputs();
-  ConstructVars("output", {"oo"}, output);
+  ConstructVars("input", {"ii"}, op_desc.add_inputs());
+  ConstructVars("output", {"oo"}, op_desc.add_outputs());
 
   // attr 'test_attr' is not set
   bool caught = false;
diff --git a/paddle/framework/operator_test.cc b/paddle/framework/operator_test.cc
index 46e419a8c889b53af6e3e5b93c0f765473f32e7c..06abb9d1934c7ef363a23bb313ad2d613602e3d0 100644
--- a/paddle/framework/operator_test.cc
+++ b/paddle/framework/operator_test.cc
@@ -71,12 +71,8 @@ REGISTER_OP(test_operator, paddle::framework::OpWithoutKernelTest,
 TEST(OperatorBase, all) {
   paddle::framework::OpDesc op_desc;
   op_desc.set_type("test_operator");
-
-  auto* ipt = op_desc.mutable_inputs()->Add();
-  ConstructVars("IN1", {"input"}, ipt);
-
-  auto* output = op_desc.mutable_outputs()->Add();
-  ConstructVars("OUT1", {"output"}, output);
+  ConstructVars("IN1", {"input"}, op_desc.add_inputs());
+  ConstructVars("OUT1", {"output"}, op_desc.add_outputs());
 
   auto attr = op_desc.mutable_attrs()->Add();
   attr->set_name("scale");
@@ -195,11 +191,8 @@ REGISTER_OP_CPU_KERNEL(op_with_kernel,
 TEST(OpKernel, all) {
   paddle::framework::OpDesc op_desc;
   op_desc.set_type("op_with_kernel");
-  auto* ipt = op_desc.mutable_inputs()->Add();
-  ConstructVars("IN1", {"x"}, ipt);
-
-  auto* output = op_desc.mutable_outputs()->Add();
-  ConstructVars("OUT1", {"y"}, output);
+  ConstructVars("IN1", {"x"}, op_desc.add_inputs());
+  ConstructVars("OUT1", {"y"}, op_desc.add_outputs());
 
   auto attr = op_desc.mutable_attrs()->Add();
   attr->set_name("scale");
@@ -226,12 +219,9 @@ TEST(OpKernel, multi_inputs) {
 
   OpDesc op_desc;
   op_desc.set_type("op_multi_inputs_with_kernel");
-  auto* x = op_desc.mutable_inputs()->Add();
-  ConstructVars("xs", {"x0", "x1", "x2"}, x);
-  auto* k = op_desc.mutable_inputs()->Add();
-  ConstructVars("k", {"k0"}, k);
-  auto* y = op_desc.mutable_outputs()->Add();
-  ConstructVars("ys", {"y0", "y1"}, y);
+  ConstructVars("xs", {"x0", "x1", "x2"}, op_desc.add_inputs());
+  ConstructVars("k", {"k0"}, op_desc.add_inputs());
+  ConstructVars("ys", {"y0", "y1"}, op_desc.add_outputs());
 
   auto attr = op_desc.mutable_attrs()->Add();
   attr->set_name("scale");