diff --git a/paddle/scripts/paddle_build.sh b/paddle/scripts/paddle_build.sh
index 404099f5e8b00b21eb29e6851451a48946308d85..48f97c076cd6680fc4ff34d7103e54d8f527bd30 100755
--- a/paddle/scripts/paddle_build.sh
+++ b/paddle/scripts/paddle_build.sh
@@ -685,28 +685,23 @@ EOF
         echo "ipipe_log_param_Mac_TestCases_Time: $[ $ut_endTime_s - $ut_startTime_s ]s" >> ${PADDLE_ROOT}/build/build_summary.txt
         paddle version
         # Recovery proxy to avoid failure in later steps
-        set +x
         export http_proxy=$my_proxy
         export https_proxy=$my_proxy
         if [ "$mactest_error" != 0 ];then
             show_ut_retry_result
         fi
-        set -x
     fi
 }
 
 function get_precision_ut_mac() {
     on_precision=0
-    set -x
     UT_list=$(ctest -N | awk -F ': ' '{print $2}' | sed '/^$/d' | sed '$d')
     precison_cases=""
     if [ ${PRECISION_TEST:-OFF} == "ON" ]; then
         python3.7 $PADDLE_ROOT/tools/get_pr_ut.py
         if [[ -f "ut_list" ]]; then
-            set +x
             echo "PREC length: "`wc -l ut_list`
             precision_cases=`cat ut_list`
-            set -x
         fi
     fi
     if [ ${PRECISION_TEST:-OFF} == "ON" ] && [[ "$precision_cases" != "" ]];then
diff --git a/tools/coverage/gcda_clean.py b/tools/coverage/gcda_clean.py
index 39fa3509cb86eb51d16abbcabcf5b12cb99df1bb..12bd04a6907ea9bb83b5c25daf9c74f28982724d 100644
--- a/tools/coverage/gcda_clean.py
+++ b/tools/coverage/gcda_clean.py
@@ -18,6 +18,7 @@
 
 import os
 import sys
+import time
 
 from github import Github
 
@@ -33,7 +34,18 @@ def get_pull(pull_id):
     """
     token = os.getenv('GITHUB_API_TOKEN')
     github = Github(token, timeout=60)
-    repo = github.get_repo('PaddlePaddle/Paddle')
+    idx = 1
+    while idx < 4:
+        try:
+            repo = github.get_repo('PaddlePaddle/Paddle')
+        except Exception as e:
+            print(e)
+            print("get_repo error, retry {} times after {} secs.".format(
+                idx, idx * 10))
+        else:
+            break
+        idx += 1
+        time.sleep(idx * 10)
     pull = repo.get_pull(pull_id)
 
     return pull
diff --git a/tools/coverage/paddle_coverage.sh b/tools/coverage/paddle_coverage.sh
index fd28d939bd1cc74bdfc34ae8f1c8885ba7e393ed..7fb32040e795ca7ab2369900e7ceefb5c4808836 100644
--- a/tools/coverage/paddle_coverage.sh
+++ b/tools/coverage/paddle_coverage.sh
@@ -33,7 +33,7 @@ make install
 
 cd /paddle/build
 
-python3.7 ${PADDLE_ROOT}/tools/coverage/gcda_clean.py ${GIT_PR_ID}
+python3.7 ${PADDLE_ROOT}/tools/coverage/gcda_clean.py ${GIT_PR_ID} || exit 101
 
 lcov --capture -d ./ -o coverage.info --rc lcov_branch_coverage=0