diff --git a/internal/registry/registry.go b/internal/registry/registry.go
index 8f9aae7..00a9d2c 100644
--- a/internal/registry/registry.go
+++ b/internal/registry/registry.go
@@ -23,8 +23,10 @@ import (
 	"github.com/elastic/go-sysinfo/types"
 )
 
-type HostOptsCreator = func(ProviderOptions) HostProvider
-type ProcessOptsCreator = func(ProviderOptions) ProcessProvider
+type (
+	HostOptsCreator    = func(ProviderOptions) HostProvider
+	ProcessOptsCreator = func(ProviderOptions) ProcessProvider
+)
 
 // HostProvider defines interfaces that provide host-specific metrics
 type HostProvider interface {
@@ -78,7 +80,6 @@ func Register(provider interface{}) {
 		}
 		processProvider = p
 	}
-
 }
 
 // GetHostProvider returns the HostProvider registered for the system. May return nil.
@@ -87,7 +88,6 @@ func GetHostProvider(opts ProviderOptions) HostProvider {
 		return hostProviderWithOpts(opts)
 	}
 	return hostProvider
-
 }
 
 // GetProcessProvider returns the ProcessProvider registered on the system. May return nil.
diff --git a/providers/linux/host_linux.go b/providers/linux/host_linux.go
index ecaed70..3a09f63 100644
--- a/providers/linux/host_linux.go
+++ b/providers/linux/host_linux.go
@@ -37,7 +37,6 @@ func init() {
 	// register wrappers that implement the HostFS versions of the ProcessProvider and HostProvider
 	registry.Register(func(opts registry.ProviderOptions) registry.HostProvider { return newLinuxSystem(opts.Hostfs) })
 	registry.Register(func(opts registry.ProviderOptions) registry.ProcessProvider { return newLinuxSystem(opts.Hostfs) })
-
 }
 
 type linuxSystem struct {
diff --git a/providers/linux/machineid_test.go b/providers/linux/machineid_test.go
index 0706497..3dee6ec 100644
--- a/providers/linux/machineid_test.go
+++ b/providers/linux/machineid_test.go
@@ -1,3 +1,20 @@
+// Licensed to Elasticsearch B.V. under one or more contributor
+// license agreements. See the NOTICE file distributed with
+// this work for additional information regarding copyright
+// ownership. Elasticsearch B.V. licenses this file to you under
+// the Apache License, Version 2.0 (the "License"); you may
+// not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
 package linux
 
 import (