diff --git a/middleware/etcd/debug_test.go b/middleware/etcd/debug_test.go
index cf1a65129..8c002baff 100644
--- a/middleware/etcd/debug_test.go
+++ b/middleware/etcd/debug_test.go
@@ -1,3 +1,5 @@
+// +build etcd
+
 package etcd
 
 import (