diff --git a/holder.go b/holder.go
index 2fdb58e97..854d778ef 100644
--- a/holder.go
+++ b/holder.go
@@ -70,7 +70,7 @@ func NewHolder() *Holder {
 }
 
 // Open initializes the root data directory for the holder.
-func (h *Holder) Open() error {
+func (h *Holder) Open(logOutput io.Writer) error {
 	if err := os.MkdirAll(h.Path, 0777); err != nil {
 		return err
 	}
@@ -87,6 +87,8 @@ func (h *Holder) Open() error {
 		return err
 	}
 
+	h.LogOutput = logOutput
+
 	for _, fi := range fis {
 		if !fi.IsDir() {
 			continue
diff --git a/server.go b/server.go
index 6154ed3e1..265a400f5 100644
--- a/server.go
+++ b/server.go
@@ -129,7 +129,7 @@ func (s *Server) Open() error {
 	}
 
 	// Open holder.
-	if err := s.Holder.Open(); err != nil {
+	if err := s.Holder.Open(s.LogOutput); err != nil {
 		return fmt.Errorf("opening Holder: %v", err)
 	}
 
@@ -159,7 +159,6 @@ func (s *Server) Open() error {
 
 	// Initialize Holder.
 	s.Holder.Broadcaster = s.Broadcaster
-	s.Holder.LogOutput = s.LogOutput
 
 	// Serve HTTP.
 	go func() { http.Serve(ln, s.Handler) }()