diff --git a/pkg/tso/keyspace_group_manager.go b/pkg/tso/keyspace_group_manager.go
index d1e94d445cc7..9b2830ebd6b9 100644
--- a/pkg/tso/keyspace_group_manager.go
+++ b/pkg/tso/keyspace_group_manager.go
@@ -1439,7 +1439,7 @@ func (kgm *KeyspaceGroupManager) groupSplitPatroller() {
 	defer kgm.wg.Done()
 	patrolInterval := groupPatrolInterval
 	failpoint.Inject("fastGroupSplitPatroller", func() {
-		patrolInterval = 200 * time.Millisecond
+		patrolInterval = 500 * time.Millisecond
 	})
 	ticker := time.NewTicker(patrolInterval)
 	defer ticker.Stop()