diff --git a/BUILD.gn b/BUILD.gn
index fbbfe4760bc54ece6c9e6d01728eaaf190f776bf..bfbba686dd41737aad18b339830a5c3307337681 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -221,7 +221,7 @@ config("ark_jsruntime_config") {
 config("ecma_test_config") {
   visibility = [ ":*" ]
 
-  cflags_cc = [ "-Wno-sign-compare" ]
+  cflags_cc = []
 }
 
 ecma_source = [
diff --git a/run_test262.sh b/run_test262.sh
index f54a1436899d348c7d9228ab71a156c982df037d..c648234fd0e472f505c6e1e6a21cc4d51dd4340a 100755
--- a/run_test262.sh
+++ b/run_test262.sh
@@ -15,7 +15,7 @@
 set -e
 
 pushd ark/ts2abc
-    time=`date +'%Y%m%d%H%M%S'`
+    time=$(date +'%Y%m%d%H%M%S')
     if [ ! -d report ];then
         mkdir report
     fi
@@ -35,7 +35,7 @@ pushd ark/ts2abc
     cp out/test262/result.txt report/result_es2015_${time}.txt
 
     pushd report
-        es2015_fail=`grep FAIL result_es2015_${time}.txt | wc -l`
+        es2015_fail=$(grep FAIL result_es2015_${time}.txt | wc -l)
         threshold=0
         if [ ${es2015_fail} -gt ${threshold} ];then
             echo 'test262 fail case over thresgold'