diff --git a/README.md b/README.md
index 2c312a6..77299e5 100644
--- a/README.md
+++ b/README.md
@@ -181,7 +181,7 @@ log:
 stat:
   engine: "memory" # support memory, redis, boltdb, buntdb or leveldb
   redis:
-    cluster: false 
+    cluster: false
     addr: "localhost:6379" # if cluster is true, you may set this to "localhost:6379,localhost:6380,localhost:6381"
     password: ""
     db: 0
diff --git a/config/testdata/config.yml b/config/testdata/config.yml
index 2a071d1..daa3b93 100644
--- a/config/testdata/config.yml
+++ b/config/testdata/config.yml
@@ -83,7 +83,8 @@ log:
 stat:
   engine: "memory" # support memory, redis, boltdb, buntdb or leveldb
   redis:
-    addr: "localhost:6379"
+    cluster: false
+    addr: "localhost:6379" # if cluster is true, you may set this to "localhost:6379,localhost:6380,localhost:6381"
     password: ""
     db: 0
   boltdb: