diff --git a/discovery/file/file.go b/discovery/file/file.go
index 994f0aefd4..3e1566ea59 100644
--- a/discovery/file/file.go
+++ b/discovery/file/file.go
@@ -16,6 +16,11 @@ type Discovery struct {
 }
 
 func init() {
+	Init()
+}
+
+// Init is exported
+func Init() {
 	discovery.Register("file", &Discovery{})
 }
 
diff --git a/discovery/kv/kv.go b/discovery/kv/kv.go
index 1970e4f7fb..64850bfeda 100644
--- a/discovery/kv/kv.go
+++ b/discovery/kv/kv.go
@@ -21,6 +21,11 @@ type Discovery struct {
 }
 
 func init() {
+	Init()
+}
+
+// Init is exported
+func Init() {
 	discovery.Register("zk", &Discovery{backend: store.ZK})
 	discovery.Register("consul", &Discovery{backend: store.CONSUL})
 	discovery.Register("etcd", &Discovery{backend: store.ETCD})
diff --git a/discovery/nodes/nodes.go b/discovery/nodes/nodes.go
index b93208186d..7de7ae2f57 100644
--- a/discovery/nodes/nodes.go
+++ b/discovery/nodes/nodes.go
@@ -13,6 +13,11 @@ type Discovery struct {
 }
 
 func init() {
+	Init()
+}
+
+// Init is exported
+func Init() {
 	discovery.Register("nodes", &Discovery{})
 }
 
diff --git a/discovery/token/token.go b/discovery/token/token.go
index cca6f27b79..71f03b7179 100644
--- a/discovery/token/token.go
+++ b/discovery/token/token.go
@@ -24,6 +24,11 @@ type Discovery struct {
 }
 
 func init() {
+	Init()
+}
+
+// Init is exported
+func Init() {
 	discovery.Register("token", &Discovery{})
 }