diff --git a/tf_adapter/tests/st/optimizers/testcase/om_partition_subgraphs_pass_test.cc b/tf_adapter/tests/st/optimizers/testcase/om_partition_subgraphs_pass_test.cc
index 38e0704299108191e82e5d966ed9b68a867a4fcd..e237ac90c821f95810a8dfe3b9d0d306e19f9c27 100644
--- a/tf_adapter/tests/st/optimizers/testcase/om_partition_subgraphs_pass_test.cc
+++ b/tf_adapter/tests/st/optimizers/testcase/om_partition_subgraphs_pass_test.cc
@@ -333,5 +333,55 @@ TEST_F(OmOptimizationPassTest, NpuOpsIdentifierTest06) {
   ClearLogLevelForC();
   system(("rm -rf " + opp_path).c_str());
 }
+TEST_F(OmOptimizationPassTest, NpuOpsIdentifierTest07) {
+  SetLogLevelForC(0);
+  std::string opp_path = __FILE__;
+  opp_path = opp_path.substr(0, opp_path.rfind("/") + 1) + "opp_path/";
+  std::string custom_opp_path = opp_path + "custom_opp_path";
+  setenv("ASCEND_OPP_PATH", opp_path.c_str(), 1);
+  setenv("ASCEND_CUSTOM_OPP_PATH", custom_opp_path.c_str(), 1);
+  std::string path_builtin = opp_path + "built-in";
+  std::string path_vendors = opp_path + "vendors";
+  system(("mkdir -p " + path_builtin).c_str());
+  system(("mkdir -p " + path_vendors).c_str());
+  system(("mkdir -p " + custom_opp_path).c_str());
+  nlohmann::json allJson;
+  NpuOpsIdentifier *instance = new NpuOpsIdentifier(false, allJson);
+  EXPECT_NE(instance, nullptr);
+  delete instance;
+  ClearLogLevelForC();
+  system(("rm -rf " + opp_path).c_str());
+}
+TEST_F(OmOptimizationPassTest, NpuOpsIdentifierTest08) {
+  SetLogLevelForC(0);
+  std::string opp_path = __FILE__;
+  opp_path = opp_path.substr(0, opp_path.rfind("/") + 1) + "opp_path/";
+  std::string custom_opp_path_01 = opp_path + "/custom_opp_path_01";
+  std::string custom_opp_path_invalid_01 = opp_path + "/custom_opp_path_invalid_01";
+  std::string custom_opp_path_empty = "";
+  std::string custom_opp_path_02 = opp_path + "/custom_opp_path_02";
+  std::string custom_opp_path_invalid_02 = opp_path + "/custom_opp_path_invalid_02";
+  setenv("ASCEND_OPP_PATH", opp_path.c_str(), 1);
+  setenv("ASCEND_CUSTOM_OPP_PATH", (custom_opp_path_01 + ":" +
+                                    custom_opp_path_invalid_01 + ":" +
+                                    custom_opp_path_empty + ":" +
+                                    custom_opp_path_02 + ":" +
+                                    custom_opp_path_invalid_02
+                                   ).c_str(), 1);
+  std::string path_builtin = opp_path + "built-in";
+  std::string path_vendors = opp_path + "vendors";
+  std::string path_config = path_vendors + "/config.ini";
+  system(("mkdir -p " + path_builtin).c_str());
+  system(("mkdir -p " + path_vendors).c_str());
+  system(("echo 'load_priority=customize,mdc,lhisi' > " + path_config).c_str());
+  system(("mkdir -p " + custom_opp_path_01).c_str());
+  system(("mkdir -p " + custom_opp_path_02).c_str());
+  nlohmann::json allJson;
+  NpuOpsIdentifier *instance = new NpuOpsIdentifier(false, allJson);
+  EXPECT_NE(instance, nullptr);
+  delete instance;
+  ClearLogLevelForC();
+  system(("rm -rf " + opp_path).c_str());
+}
 } // end namespace
 } // end tensorflow
diff --git a/tf_adapter/tests/ut/optimizers/testcase/om_partition_subgraphs_pass_test.cc b/tf_adapter/tests/ut/optimizers/testcase/om_partition_subgraphs_pass_test.cc
index 38e0704299108191e82e5d966ed9b68a867a4fcd..e237ac90c821f95810a8dfe3b9d0d306e19f9c27 100644
--- a/tf_adapter/tests/ut/optimizers/testcase/om_partition_subgraphs_pass_test.cc
+++ b/tf_adapter/tests/ut/optimizers/testcase/om_partition_subgraphs_pass_test.cc
@@ -333,5 +333,55 @@ TEST_F(OmOptimizationPassTest, NpuOpsIdentifierTest06) {
   ClearLogLevelForC();
   system(("rm -rf " + opp_path).c_str());
 }
+TEST_F(OmOptimizationPassTest, NpuOpsIdentifierTest07) {
+  SetLogLevelForC(0);
+  std::string opp_path = __FILE__;
+  opp_path = opp_path.substr(0, opp_path.rfind("/") + 1) + "opp_path/";
+  std::string custom_opp_path = opp_path + "custom_opp_path";
+  setenv("ASCEND_OPP_PATH", opp_path.c_str(), 1);
+  setenv("ASCEND_CUSTOM_OPP_PATH", custom_opp_path.c_str(), 1);
+  std::string path_builtin = opp_path + "built-in";
+  std::string path_vendors = opp_path + "vendors";
+  system(("mkdir -p " + path_builtin).c_str());
+  system(("mkdir -p " + path_vendors).c_str());
+  system(("mkdir -p " + custom_opp_path).c_str());
+  nlohmann::json allJson;
+  NpuOpsIdentifier *instance = new NpuOpsIdentifier(false, allJson);
+  EXPECT_NE(instance, nullptr);
+  delete instance;
+  ClearLogLevelForC();
+  system(("rm -rf " + opp_path).c_str());
+}
+TEST_F(OmOptimizationPassTest, NpuOpsIdentifierTest08) {
+  SetLogLevelForC(0);
+  std::string opp_path = __FILE__;
+  opp_path = opp_path.substr(0, opp_path.rfind("/") + 1) + "opp_path/";
+  std::string custom_opp_path_01 = opp_path + "/custom_opp_path_01";
+  std::string custom_opp_path_invalid_01 = opp_path + "/custom_opp_path_invalid_01";
+  std::string custom_opp_path_empty = "";
+  std::string custom_opp_path_02 = opp_path + "/custom_opp_path_02";
+  std::string custom_opp_path_invalid_02 = opp_path + "/custom_opp_path_invalid_02";
+  setenv("ASCEND_OPP_PATH", opp_path.c_str(), 1);
+  setenv("ASCEND_CUSTOM_OPP_PATH", (custom_opp_path_01 + ":" +
+                                    custom_opp_path_invalid_01 + ":" +
+                                    custom_opp_path_empty + ":" +
+                                    custom_opp_path_02 + ":" +
+                                    custom_opp_path_invalid_02
+                                   ).c_str(), 1);
+  std::string path_builtin = opp_path + "built-in";
+  std::string path_vendors = opp_path + "vendors";
+  std::string path_config = path_vendors + "/config.ini";
+  system(("mkdir -p " + path_builtin).c_str());
+  system(("mkdir -p " + path_vendors).c_str());
+  system(("echo 'load_priority=customize,mdc,lhisi' > " + path_config).c_str());
+  system(("mkdir -p " + custom_opp_path_01).c_str());
+  system(("mkdir -p " + custom_opp_path_02).c_str());
+  nlohmann::json allJson;
+  NpuOpsIdentifier *instance = new NpuOpsIdentifier(false, allJson);
+  EXPECT_NE(instance, nullptr);
+  delete instance;
+  ClearLogLevelForC();
+  system(("rm -rf " + opp_path).c_str());
+}
 } // end namespace
 } // end tensorflow