diff --git a/tests/test-all.sh b/tests/test-all.sh
index 26005c8bc469b8516d738b25ddb09c9b80946bfb..275c6b16773bb3df00271ea1628dad706a1f4252 100755
--- a/tests/test-all.sh
+++ b/tests/test-all.sh
@@ -27,7 +27,7 @@ function runPyCaseOneByOne {
       if [[ $line != *sleep* ]]; then
         case=`echo $line|awk '{print $NF}'`
         start_time=`date +%s`
-        $line && \
+        $line > /dev/null 2>&1 && \
           echo -e "${GREEN}$case success${NC}" | tee -a pytest-out.log || \
           echo -e "${RED}$case failed${NC}" | tee -a pytest-out.log
         end_time=`date +%s`