diff --git a/tests/_utils/test_prepare b/tests/_utils/test_prepare
index dce628e9d4..c64c92f8ac 100644
--- a/tests/_utils/test_prepare
+++ b/tests/_utils/test_prepare
@@ -32,7 +32,7 @@ function wait_pattern_exit() {
     pattern=$1
     while true
     do
-        if [ "pgrep -f $pattern" != "0" ]; then
+        if ! pgrep -f $pattern >/dev/null 2>&1; then
             echo "pattern $pattern already exit"
             return 0
         fi
diff --git a/tests/all_mode/run.sh b/tests/all_mode/run.sh
index 7ee90340df..0b2d98a6a0 100755
--- a/tests/all_mode/run.sh
+++ b/tests/all_mode/run.sh
@@ -392,6 +392,7 @@ function run() {
 		"resume-relay -s mysql-replica-01" \
 		"\"result\": true" 2
 
+	sleep 2
 	# relay should continue pulling from syncer's checkpoint, so only pull the latest binlog
 	server_uuid=$(tail -n 1 $WORK_DIR/worker1/relay_log/server-uuid.index)
 	echo "relay logs $(ls $WORK_DIR/worker1/relay_log/$server_uuid)"