diff --git a/executor/tiflash_test.go b/executor/tiflash_test.go
index 71cf414403752..b394d36c6da5b 100644
--- a/executor/tiflash_test.go
+++ b/executor/tiflash_test.go
@@ -24,8 +24,6 @@ import (
 	"sync/atomic"
 	"time"
 
-	"github.com/pingcap/tidb/util/collate"
-
 	. "github.com/pingcap/check"
 	"github.com/pingcap/errors"
 	"github.com/pingcap/failpoint"
@@ -39,6 +37,7 @@ import (
 	"github.com/pingcap/tidb/session"
 	"github.com/pingcap/tidb/store/mockstore"
 	"github.com/pingcap/tidb/store/mockstore/unistore"
+	"github.com/pingcap/tidb/util/collate"
 	"github.com/pingcap/tidb/util/israce"
 	"github.com/pingcap/tidb/util/kvcache"
 	"github.com/pingcap/tidb/util/testkit"