diff --git a/paddle/scripts/paddle_build.sh b/paddle/scripts/paddle_build.sh
index 8a61ab633803e0cfee53a5c6e3e84adc61650e37..9f8e36b67ce7eb9a73ad59ef4814642b2084ff33 100755
--- a/paddle/scripts/paddle_build.sh
+++ b/paddle/scripts/paddle_build.sh
@@ -678,6 +678,7 @@ EOF
             echo "========================================="
         fi
         bash $PADDLE_ROOT/tools/check_added_ut.sh
+        check_approvals_of_unittest 2
         get_precision_ut_mac
         if [[ "$on_precision" == "0" ]];then
             ctest -E "($disable_ut_quickly)" -LE ${nightly_label} --output-on-failure -j $2 | tee $tmpfile
@@ -1152,36 +1153,12 @@ function check_diff_file_for_coverage() {
     export PADDLE_GIT_DIFF_PY_FILE=${diff_py_file%*,}
 }
 
-function check_change_of_unittest() {
-    generate_unittest_spec "PR"
-    check_approvals_of_unittest 2
-}
+
 
 function check_sequence_op_unittest(){
     /bin/bash ${PADDLE_ROOT}/tools/check_sequence_op.sh
 }
 
-function generate_unittest_spec() {
-    spec_kind=$1
-    if [ "$spec_kind" == "DEV" ]; then
-        cat <<EOF
-        ============================================
-        Generate unit tests.spec of develop.
-        ============================================
-EOF
-    elif [ "$spec_kind" == "PR" ]; then
-        cat <<EOF
-        ============================================
-        Generate unit tests.spec of this PR.
-        ============================================
-EOF
-    else
-        echo "Not supported $1"
-        exit 1
-    fi
-    spec_path=${PADDLE_ROOT}/paddle/fluid/UNITTEST_${spec_kind}.spec
-    ctest -N | awk -F ':' '{print $2}' | sed '/^$/d' | sed '$d' > ${spec_path}
-}
 
 
 function assert_api_spec_approvals() {
@@ -2510,6 +2487,8 @@ set -x
         export TEST_NUM_PERCENT_CASES=0.15
         precison_cases=""
         bash $PADDLE_ROOT/tools/check_added_ut.sh
+        #check change of pr_unnitests and dev_unnitests
+        check_approvals_of_unittest 2
         if [ ${PRECISION_TEST:-OFF} == "ON" ]; then
             python3.7 $PADDLE_ROOT/tools/get_pr_ut.py
         fi
@@ -3552,7 +3531,6 @@ function main() {
         enable_unused_var_check
         parallel_test
         check_coverage
-        check_change_of_unittest ${PYTHON_ABI:-""}
         ;;
       cpu_cicheck_coverage)
         check_diff_file_for_coverage
@@ -3563,7 +3541,6 @@ function main() {
       gpu_cicheck_coverage)
         parallel_test
         check_coverage
-        check_change_of_unittest ${PYTHON_ABI:-""}
         ;;
       check_coverage_build)
         check_coverage_build
@@ -3626,7 +3603,6 @@ function main() {
       maccheck_py35)
         cmake_gen_and_build_mac ${PYTHON_ABI:-""}
         run_mac_test ${PYTHON_ABI:-""} ${PROC_RUN:-1}
-        check_change_of_unittest ${PYTHON_ABI:-""}
         ;;
       macbuild)
         cmake_gen ${PYTHON_ABI:-""}
diff --git a/tools/check_added_ut.sh b/tools/check_added_ut.sh
index 76f5e294d13c1f41c89eed33387f8bbc626640b1..ee6793605af55a196dd3a6dee1ade85d6ec0f8f8 100644
--- a/tools/check_added_ut.sh
+++ b/tools/check_added_ut.sh
@@ -54,9 +54,11 @@ fi
 # remove line ended with .exe to get correct deleted_ut list
 ctest -N | awk -F ':' '{print $2}' | sed '/^$/d' | sed '$d' | sed 's/ //g' | sed '/\.exe$/d' | grep 'test' > $PADDLE_ROOT/br-ut
 #UNITTEST_DEV.spec is used for checking changes of unnitests between pr and paddle_develop in the later step
-spec_path=${PADDLE_ROOT}/paddle/fluid/UNITTEST_DEV.spec
-ctest -N | awk -F ':' '{print $2}' | sed '/^$/d' | sed '$d' > ${spec_path}
+spec_path_dev=${PADDLE_ROOT}/paddle/fluid/UNITTEST_DEV.spec
+ctest -N | awk -F ':' '{print $2}' | sed '/^$/d' | sed '$d' > ${spec_path_dev}
 cd $PADDLE_ROOT/build
+spec_path_pr=${PADDLE_ROOT}/paddle/fluid/UNITTEST_PR.spec
+ctest -N | awk -F ':' '{print $2}' | sed '/^$/d' | sed '$d' > ${spec_path_pr}
 ctest -N | awk -F ':' '{print $2}' | sed '/^$/d' | sed '$d' | sed 's/ //g' | sed '/\.exe$/d' | grep 'test' > $PADDLE_ROOT/pr-ut
 cd $PADDLE_ROOT
 grep -F -x -v -f br-ut pr-ut > $PADDLE_ROOT/added_ut