diff --git a/repository.go b/repository.go
index 47c6f1f..6ebc0a9 100644
--- a/repository.go
+++ b/repository.go
@@ -79,10 +79,7 @@ func (r *Repository) ReadBlob(bt backend.Type, id backend.ID) (io.ReadSeeker, er
 	file := filepath.Join(r.path, string(bt), id.String())
 	f, err := os.Open(file)
 	defer f.Close()
-	if err != nil {
-		return f, err
-	}
-	return f, nil
+	return f, err
 }
 
 func (r *Repository) WriteBlob(bt backend.Type, id backend.ID, data []byte) error {
diff --git a/router_test.go b/router_test.go
index 9122cd8..575ab3c 100644
--- a/router_test.go
+++ b/router_test.go
@@ -50,12 +50,12 @@ func TestBackendType(t *testing.T) {
 	var bt backend.Type
 
 	bt = BackendType("/")
-	if !bt.IsNull() {
+	if bt != "" {
 		t.Error("backend type should be nil")
 	}
 
 	bt = BackendType("/test")
-	if !bt.IsNull() {
+	if bt != "" {
 		t.Error("backend type should be nil")
 	}