diff --git a/paddle/fluid/framework/ir/subgraph_detector.cc b/paddle/fluid/framework/ir/subgraph_detector.cc
index 62c91af15da60b9b0a74028afb0aeb689073b524..7979953d7be827ffc944ae939782923504802bbc 100644
--- a/paddle/fluid/framework/ir/subgraph_detector.cc
+++ b/paddle/fluid/framework/ir/subgraph_detector.cc
@@ -309,7 +309,8 @@ std::vector<std::vector<Node *>> SubgraphDetector::ExtractSubGraphs() {
     BriefNode *brief_node = itr.second;
 
     if (!Agent(brief_node->node).marked()) {
-      VLOG(4) << brief_node->node->id() << " node not a trt candidate.";
+      VLOG(4) << brief_node->node->id() << " node named "
+              << brief_node->node->Name() << " is not a trt candidate.";
       continue;
     }
 
diff --git a/paddle/fluid/inference/tests/api/CMakeLists.txt b/paddle/fluid/inference/tests/api/CMakeLists.txt
index 959ba2288acc0d214a82b5b1abc1556e1cac3e2a..9a3a73f6c946d76f0da1b18feb8e7d61c0bf59b6 100644
--- a/paddle/fluid/inference/tests/api/CMakeLists.txt
+++ b/paddle/fluid/inference/tests/api/CMakeLists.txt
@@ -471,19 +471,10 @@ if(WITH_GPU AND TENSORRT_FOUND)
         inference_download_and_uncompress(${TEST_TRT_ERNIE_MODEL} ${INFERENCE_URL}/tensorrt_test "ernie_model_4_unserialized.tgz")
     endif()
 
-    inference_analysis_test(test_trt_dynamic_shape_ernie_serialize SRCS trt_dynamic_shape_ernie_deserialize_test.cc
+    inference_analysis_test(test_trt_dynamic_shape_ernie_ser_deser SRCS trt_dynamic_shape_ernie_deserialize_test.cc
             EXTRA_DEPS ${INFERENCE_EXTRA_DEPS} 
             ARGS --infer_model=${TEST_TRT_ERNIE_MODEL}/ernie_model_4_unserialized)
 
-    set(TEST_TRT_ERNIE_SER_MODEL "${TRT_MODEL_INSTALL_DIR}/ernie_test/ernie_model_4_serialized/")
-    if (NOT EXISTS ${TEST_TRT_ERNIE_SER_MODEL})
-        inference_download_and_uncompress(${TEST_TRT_ERNIE_MODEL} ${INFERENCE_URL}/tensorrt_test "ernie_model_4_serialized.tgz")
-    endif()
-
-    inference_analysis_test(test_trt_dynamic_shape_ernie_deserialize SRCS trt_dynamic_shape_ernie_deserialize_test.cc
-            EXTRA_DEPS ${INFERENCE_EXTRA_DEPS} 
-            ARGS --infer_model=${TEST_TRT_ERNIE_MODEL}/ernie_model_4_serialized)
-
 endif()
 
 set(LITE_MODEL_INSTALL_DIR "${INFERENCE_DEMO_INSTALL_DIR}/lite")
diff --git a/paddle/fluid/inference/tests/api/trt_dynamic_shape_ernie_deserialize_test.cc b/paddle/fluid/inference/tests/api/trt_dynamic_shape_ernie_deserialize_test.cc
index 6526b87436557b7f0c5c6dc5d3b59f2d70323d84..7e5dfa2424dbca4fb3a8a08e3d7fa7fbc3060d3d 100644
--- a/paddle/fluid/inference/tests/api/trt_dynamic_shape_ernie_deserialize_test.cc
+++ b/paddle/fluid/inference/tests/api/trt_dynamic_shape_ernie_deserialize_test.cc
@@ -123,8 +123,11 @@ void trt_ernie(bool with_fp16, std::vector<float> result) {
   config.EnableTensorRtEngine(1 << 30, 1, 5, precision, true, false);
   config.SetTRTDynamicShapeInfo(min_input_shape, max_input_shape,
                                 opt_input_shape);
+  AnalysisConfig* config_deser = new AnalysisConfig(config);
+
   std::vector<float> out_data;
-  run(config, &out_data);
+  run(config, &out_data);         // serialize
+  run(*config_deser, &out_data);  // deserialize
   for (size_t i = 0; i < out_data.size(); i++) {
     EXPECT_NEAR(result[i], out_data[i], 1e-6);
   }
diff --git a/paddle/fluid/inference/tests/api/trt_dynamic_shape_ernie_test.cc b/paddle/fluid/inference/tests/api/trt_dynamic_shape_ernie_test.cc
index babe9977cd571f588f0bdc5a6723d4b05afab72b..c99ebcdcb5f319f73b7fd931d13f27684db39cad 100644
--- a/paddle/fluid/inference/tests/api/trt_dynamic_shape_ernie_test.cc
+++ b/paddle/fluid/inference/tests/api/trt_dynamic_shape_ernie_test.cc
@@ -126,7 +126,7 @@ void trt_ernie(bool with_fp16, std::vector<float> result) {
   std::vector<float> out_data;
   run(config, &out_data);
   for (size_t i = 0; i < out_data.size(); i++) {
-    EXPECT_NEAR(result[i], out_data[i], 1e-6);
+    EXPECT_NEAR(result[i], out_data[i], 1e-5);
   }
 }