diff --git a/storage/metric/leveldb/leveldb_test.go b/storage/metric/leveldb/leveldb_test.go
index f7804cf69..91ff6df74 100644
--- a/storage/metric/leveldb/leveldb_test.go
+++ b/storage/metric/leveldb/leveldb_test.go
@@ -29,7 +29,7 @@ import (
 )
 
 const (
-	stochasticMaximumVariance = 64
+	stochasticMaximumVariance = 8
 )
 
 var testBasicLifecycle func(t test.Tester) = func(t test.Tester) {