diff --git a/kv/config/config.go b/kv/config/config.go
index ee58a768..0b65aed0 100644
--- a/kv/config/config.go
+++ b/kv/config/config.go
@@ -83,6 +83,7 @@ func NewDefaultConfig() *Config {
 
 func NewTestConfig() *Config {
 	return &Config{
+		LogLevel:                 "info",
 		Raft:                     true,
 		RaftBaseTickInterval:     50 * time.Millisecond,
 		RaftHeartbeatTicks:       2,
diff --git a/kv/raftstore/peer_msg_handler.go b/kv/raftstore/peer_msg_handler.go
index b2dfd625..370ae959 100644
--- a/kv/raftstore/peer_msg_handler.go
+++ b/kv/raftstore/peer_msg_handler.go
@@ -337,6 +337,8 @@ func (d *peerMsgHandler) checkSnapshot(msg *rspb.RaftMessage) (*snap.SnapKey, er
 		return &key, nil
 	}
 	meta := d.ctx.storeMeta
+	meta.Lock()
+	defer meta.Unlock()
 	if !util.RegionEqual(meta.regions[d.regionId], d.Region()) {
 		if !d.isInitialized() {
 			log.Infof("%s stale delegate detected, skip", d.Tag)
@@ -368,6 +370,8 @@ func (d *peerMsgHandler) destroyPeer() {
 	regionID := d.regionId
 	// We can't destroy a peer which is applying snapshot.
 	meta := d.ctx.storeMeta
+	meta.Lock()
+	defer meta.Unlock()
 	isInitialized := d.isInitialized()
 	if err := d.Destroy(d.ctx.engine, false); err != nil {
 		// If not panic here, the peer will be recreated in the next restart,
@@ -389,6 +393,8 @@ func (d *peerMsgHandler) destroyPeer() {
 
 func (d *peerMsgHandler) findSiblingRegion() (result *metapb.Region) {
 	meta := d.ctx.storeMeta
+	meta.RLock()
+	defer meta.RUnlock()
 	item := &regionItem{region: d.Region()}
 	meta.regionRanges.AscendGreaterOrEqual(item, func(i btree.Item) bool {
 		result = i.(*regionItem).region
diff --git a/kv/raftstore/raftstore.go b/kv/raftstore/raftstore.go
index d71fcdf3..351cd7ca 100644
--- a/kv/raftstore/raftstore.go
+++ b/kv/raftstore/raftstore.go
@@ -36,6 +36,7 @@ func (r *regionItem) Less(other btree.Item) bool {
 }
 
 type storeMeta struct {
+	sync.RWMutex
 	/// region end key -> region ID
 	regionRanges *btree.BTree
 	/// region_id -> region
diff --git a/kv/raftstore/store_worker.go b/kv/raftstore/store_worker.go
index be4574e0..936aa34f 100644
--- a/kv/raftstore/store_worker.go
+++ b/kv/raftstore/store_worker.go
@@ -118,6 +118,8 @@ func (d *storeWorker) checkMsg(msg *rspb.RaftMessage) (bool, error) {
 		// Maybe split, but not registered yet.
 		if util.IsFirstVoteMessage(msg.Message) {
 			meta := d.ctx.storeMeta
+			meta.RLock()
+			defer meta.RUnlock()
 			// Last check on whether target peer is created, otherwise, the
 			// vote message will never be comsumed.
 			if _, ok := meta.regions[regionID]; ok {
@@ -194,6 +196,8 @@ func (d *storeWorker) maybeCreatePeer(regionID uint64, msg *rspb.RaftMessage) (b
 	// we may encounter a message with larger peer id, which means
 	// current peer is stale, then we should remove current peer
 	meta := d.ctx.storeMeta
+	meta.Lock()
+	defer meta.Unlock()
 	if _, ok := meta.regions[regionID]; ok {
 		return true, nil
 	}
@@ -229,7 +233,10 @@ func (d *storeWorker) maybeCreatePeer(regionID uint64, msg *rspb.RaftMessage) (b
 func (d *storeWorker) storeHeartbeatScheduler() {
 	stats := new(schedulerpb.StoreStats)
 	stats.StoreId = d.ctx.store.Id
-	stats.RegionCount = uint32(len(d.ctx.storeMeta.regions))
+	meta := d.ctx.storeMeta
+	meta.RLock()
+	stats.RegionCount = uint32(len(meta.regions))
+	meta.RUnlock()
 	d.ctx.schedulerTaskSender <- &runner.SchedulerStoreHeartbeatTask{
 		Stats:  stats,
 		Engine: d.ctx.engine.Kv,
diff --git a/kv/test_raftstore/scheduler.go b/kv/test_raftstore/scheduler.go
index 2983e181..0d4413c8 100644
--- a/kv/test_raftstore/scheduler.go
+++ b/kv/test_raftstore/scheduler.go
@@ -3,7 +3,6 @@ package test_raftstore
 import (
 	"bytes"
 	"context"
-	"fmt"
 	"sync"
 
 	"github.com/google/btree"
@@ -350,7 +349,6 @@ func (m *MockSchedulerClient) handleHeartbeatConfVersion(region *metapb.Region)
 			if searchRegionPeerLen-regionPeerLen != 1 {
 				panic("should only one conf change")
 			}
-			fmt.Println(searchRegion, region)
 			if len(GetDiffPeers(searchRegion, region)) != 1 {
 				panic("should only one different peer")
 			}
diff --git a/kv/test_raftstore/test_test.go b/kv/test_raftstore/test_test.go
index 3a5d5bfc..9b696cca 100644
--- a/kv/test_raftstore/test_test.go
+++ b/kv/test_raftstore/test_test.go
@@ -300,6 +300,8 @@ func GenericTest(t *testing.T, part string, nclients int, unreliable bool, crash
 		}
 
 		if maxraftlog > 0 {
+			time.Sleep(1 * time.Second)
+
 			// Check maximum after the servers have processed all client
 			// requests and had time to checkpoint.
 			key := []byte("")