diff --git a/paddle/fluid/operators/stack_op_npu.cc b/paddle/fluid/operators/stack_op_npu.cc
index c6c54b7d81d1941d551702d6b22d253070129749..d2ece1da365ae851a84b06e66dfe5bd308f8ed87 100644
--- a/paddle/fluid/operators/stack_op_npu.cc
+++ b/paddle/fluid/operators/stack_op_npu.cc
@@ -90,9 +90,9 @@ REGISTER_OP_NPU_KERNEL(
     paddle::operators::StackNPUKernel<paddle::platform::float16>);
 
 REGISTER_OP_NPU_KERNEL(
-    stack_grad, paddle::operators::StackNPUKernel<int>,
+    stack_grad, paddle::operators::StackGradNPUKernel<int>,
 #ifdef PADDLE_WITH_ASCEND_INT64
-    paddle::operators::StackNPUKernel<int64_t>,
+    paddle::operators::StackGradNPUKernel<int64_t>,
 #endif
     paddle::operators::StackGradNPUKernel<float>,
     paddle::operators::StackGradNPUKernel<paddle::platform::float16>);
diff --git a/paddle/scripts/paddle_build.sh b/paddle/scripts/paddle_build.sh
index a3f98ea511d9fa232e10b60bfe4bc6d75047c884..b0aca00071342faed3624d545cb753612f4bea64 100755
--- a/paddle/scripts/paddle_build.sh
+++ b/paddle/scripts/paddle_build.sh
@@ -1746,11 +1746,14 @@ function parallel_test_base_npu() {
     # skipping if no NPU related files changed
     if [ ${SKIP_NPU_TEST:-ON} == "ON" ] ; then
         fetch_upstream_develop_if_not_exist
+        # get npu py or npu cc file changes
         git diff --name-only remotes/upstream/$BRANCH
         npu_cc_changes=$(git diff --name-only remotes/upstream/$BRANCH | grep "op_npu.cc" || true)
         npu_py_changes=$(git diff --name-only remotes/upstream/$BRANCH | grep "op_npu.py" || true)
-        if [ -z "${npu_cc_changes}" ] && [ -z "${npu_py_changes}" ] ; then
-            echo "NO NPU operators files changed, skip NPU unit tests!"
+        # get PR name
+        npu_pr_tile=$(curl https://github.com/PaddlePaddle/Paddle/pull/${GIT_PR_ID} 2>/dev/null | grep "<title>" | grep "[NPU]" || true)
+        if [ -z "${npu_cc_changes}" ] && [ -z "${npu_py_changes}" ] && [ -z "${npu_pr_tile}" ]; then
+            echo "NO NPU operators files changed and no '[NPU]' found in PR title, skip NPU unit tests!"
             exit 0
         fi
     fi
@@ -1797,10 +1800,10 @@ set +x
             if [ ${TIMEOUT_DEBUG_HELP:-OFF} == "ON" ];then
                 bash $PADDLE_ROOT/tools/timeout_debug_help.sh "$failed_test_lists"    # cat logs for tiemout uts which killed by ctest
             fi
-            read need_retry_ut_str <<< $(echo "$failed_test_lists" | grep -oEi "\-.+\(.+\)" | sed 's/(.\+)//' | sed 's/- //' )
+            need_retry_ut_str=$(echo "$failed_test_lists" | grep -oEi "\-.+\(.+\)" | sed 's/(.\+)//' | sed 's/- //' )
             need_retry_ut_arr=(${need_retry_ut_str})
             need_retry_ut_count=${#need_retry_ut_arr[@]}
-            read retry_unittests <<< $(echo "$failed_test_lists" | grep -oEi "\-.+\(.+\)" | sed 's/(.\+)//' | sed 's/- //' )
+            retry_unittests=$(echo "$failed_test_lists" | grep -oEi "\-.+\(.+\)" | sed 's/(.\+)//' | sed 's/- //' )
             while ( [ $exec_times -lt $retry_time ] )
                 do
                     if [[ "${exec_times}" == "0" ]] ;then
@@ -1810,7 +1813,7 @@ set +x
                             is_retry_execuate=1
                         fi
                     elif [[ "${exec_times}" == "1" ]] ;then
-                        read need_retry_ut_str <<< $(echo "$failed_test_lists" | grep -oEi "\-.+\(.+\)" | sed 's/(.\+)//' | sed 's/- //' )
+                        need_retry_ut_str=$(echo "$failed_test_lists" | grep -oEi "\-.+\(.+\)" | sed 's/(.\+)//' | sed 's/- //' )
                         need_retry_ut_arr=(${need_retry_ut_str})
                         need_retry_ut_count=${#need_retry_ut_arr[@]} 
                         if [ $need_retry_ut_count -lt $exec_retry_threshold ];then
@@ -1828,7 +1831,7 @@ set +x
                             if [[ "${failed_test_lists}" == "" ]];then
                                 break
                             else
-                                read retry_unittests <<< $(echo "$failed_test_lists" | grep -oEi "\-.+\(.+\)" | sed 's/(.\+)//' | sed 's/- //' )
+                                retry_unittests=$(echo "$failed_test_lists" | grep -oEi "\-.+\(.+\)" | sed 's/(.\+)//' | sed 's/- //' )
                             fi
                         fi
                         echo "========================================="
@@ -1838,7 +1841,7 @@ set +x
                         echo "${retry_unittests}"                    
                         for line in ${retry_unittests[@]} ;
                             do
-                                read tmp_one_tmp <<< "$( echo $single_card_tests | grep -oEi $line )"
+                                tmp_one_tmp="$( echo $single_card_tests | grep -oEi $line )"
 
                                 if [[ "$tmp_one_tmp" != ""  ]]; then
                                     if [[ "$one_card_retry" == "" ]]; then
diff --git a/python/paddle/fluid/tests/unittests/npu/CMakeLists.txt b/python/paddle/fluid/tests/unittests/npu/CMakeLists.txt
index c8fe050a5dc6b38cdd91387c1a5b46b40ced8b7e..3764f4baea0075aa92f80aa99da5c00598b92bc3 100644
--- a/python/paddle/fluid/tests/unittests/npu/CMakeLists.txt
+++ b/python/paddle/fluid/tests/unittests/npu/CMakeLists.txt
@@ -13,4 +13,9 @@ if (WITH_ASCEND_CL)
     set_tests_properties(test_amp_check_finite_and_scale_op_npu PROPERTIES LABELS "RUN_TYPE=EXCLUSIVE")
     set_tests_properties(test_flags_check_nan_inf_npu PROPERTIES LABELS "RUN_TYPE=EXCLUSIVE")
     set_tests_properties(test_float_status_op_npu PROPERTIES LABELS "RUN_TYPE=EXCLUSIVE")
+
+    # Note: the following test cases has running time more than 120s
+    set_tests_properties(test_nearest_interp_op_npu PROPERTIES TIMEOUT 200)
+    set_tests_properties(test_nearest_interp_v2_op_npu PROPERTIES TIMEOUT 200)
+    set_tests_properties(test_stack_op_npu PROPERTIES TIMEOUT 300)
 endif()