diff --git a/storage/memorybysubnet/peer_store_test.go b/storage/memorybysubnet/peer_store_test.go
index 547a1dc..314a955 100644
--- a/storage/memorybysubnet/peer_store_test.go
+++ b/storage/memorybysubnet/peer_store_test.go
@@ -9,8 +9,10 @@ import (
 
 func createNew() s.PeerStore {
 	ps, err := New(Config{
-		ShardCount:                1024,
-		GarbageCollectionInterval: 10 * time.Minute,
+		ShardCount:                     1024,
+		GarbageCollectionInterval:      10 * time.Minute,
+		PreferredIPv4SubnetMaskBitsSet: 31,
+		PreferredIPv6SubnetMaskBitsSet: 64,
 	})
 	if err != nil {
 		panic(err)