diff --git a/store/tikv/coprocessor.go b/store/tikv/coprocessor.go
index c152bd3b44..8439071fd3 100644
--- a/store/tikv/coprocessor.go
+++ b/store/tikv/coprocessor.go
@@ -42,6 +42,8 @@ func (c *CopClient) SupportRequestType(reqType, subType int64) bool {
 		default:
 			return supportExpr(tipb.ExprType(subType))
 		}
+	case kv.ReqTypeDAG:
+		return c.store.mock
 	}
 	return false
 }
diff --git a/store/tikv/kv.go b/store/tikv/kv.go
index 1d46d9c4bc..69bf7ea6ee 100644
--- a/store/tikv/kv.go
+++ b/store/tikv/kv.go
@@ -105,6 +105,7 @@ type tikvStore struct {
 	lockResolver *LockResolver
 	gcWorker     *GCWorker
 	etcdAddrs    []string
+	mock         bool
 }
 
 func newTikvStore(uuid string, pdClient pd.Client, client Client, enableGC bool) (*tikvStore, error) {
@@ -112,13 +113,14 @@ func newTikvStore(uuid string, pdClient pd.Client, client Client, enableGC bool)
 	if err != nil {
 		return nil, errors.Trace(err)
 	}
-
+	_, mock := client.(*mocktikv.RPCClient)
 	store := &tikvStore{
 		clusterID:   pdClient.GetClusterID(goctx.TODO()),
 		uuid:        uuid,
 		oracle:      oracle,
 		client:      client,
 		regionCache: NewRegionCache(pdClient),
+		mock:        mock,
 	}
 	store.lockResolver = newLockResolver(store)
 	if enableGC {
diff --git a/store/tikv/lock_resolver.go b/store/tikv/lock_resolver.go
index 8c8fb26040..19173d5a99 100644
--- a/store/tikv/lock_resolver.go
+++ b/store/tikv/lock_resolver.go
@@ -15,13 +15,11 @@ package tikv
 
 import (
 	"container/list"
-	"fmt"
 	"sync"
 
 	"github.com/juju/errors"
 	"github.com/ngaut/log"
 	"github.com/pingcap/kvproto/pkg/kvrpcpb"
-	"github.com/pingcap/pd/pd-client"
 	goctx "golang.org/x/net/context"
 )
 
@@ -47,20 +45,6 @@ func newLockResolver(store *tikvStore) *LockResolver {
 	return r
 }
 
-// NewLockResolver creates a LockResolver.
-func NewLockResolver(etcdAddrs []string) (*LockResolver, error) {
-	pdCli, err := pd.NewClient(etcdAddrs)
-	if err != nil {
-		return nil, errors.Trace(err)
-	}
-	uuid := fmt.Sprintf("tikv-%v", pdCli.GetClusterID(goctx.TODO()))
-	s, err := newTikvStore(uuid, &codecPDClient{pdCli}, newRPCClient(), false)
-	if err != nil {
-		return nil, errors.Trace(err)
-	}
-	return s.lockResolver, nil
-}
-
 // TxnStatus represents a txn's final status. It should be Commit or Rollback.
 type TxnStatus uint64
 
diff --git a/store/tikv/split_test.go b/store/tikv/split_test.go
index bce4e88b98..3792648714 100644
--- a/store/tikv/split_test.go
+++ b/store/tikv/split_test.go
@@ -30,13 +30,9 @@ var _ = Suite(&testSplitSuite{})
 
 func (s *testSplitSuite) SetUpTest(c *C) {
 	s.cluster = mocktikv.NewCluster()
-	mocktikv.BootstrapWithSingleStore(s.cluster)
-	mvccStore := mocktikv.NewMvccStore()
-	client := mocktikv.NewRPCClient(s.cluster, mvccStore)
-	pdCli := &codecPDClient{mocktikv.NewPDClient(s.cluster)}
-	store, err := newTikvStore("mock-tikv-store", pdCli, client, false)
-	c.Assert(err, IsNil)
-	s.store = store
+	store, err := NewMockTikvStoreWithCluster(s.cluster)
+	c.Check(err, IsNil)
+	s.store = store.(*tikvStore)
 	s.bo = NewBackoffer(5000, context.Background())
 }
 
diff --git a/store/tikv/store_test.go b/store/tikv/store_test.go
index 5669e53341..750ee1cd79 100644
--- a/store/tikv/store_test.go
+++ b/store/tikv/store_test.go
@@ -39,13 +39,9 @@ var _ = Suite(&testStoreSuite{})
 
 func (s *testStoreSuite) SetUpTest(c *C) {
 	s.cluster = mocktikv.NewCluster()
-	mocktikv.BootstrapWithSingleStore(s.cluster)
-	mvccStore := mocktikv.NewMvccStore()
-	clientFactory := mocktikv.NewRPCClient(s.cluster, mvccStore)
-	pdCli := &codecPDClient{mocktikv.NewPDClient(s.cluster)}
-	store, err := newTikvStore("mock-tikv-store", pdCli, clientFactory, false)
-	c.Assert(err, IsNil)
-	s.store = store
+	store, err := NewMockTikvStoreWithCluster(s.cluster)
+	c.Check(err, IsNil)
+	s.store = store.(*tikvStore)
 }
 
 func (s *testStoreSuite) TestParsePath(c *C) {