diff --git a/examples/layer-group.js b/examples/layer-group.js
index 50830955b7..c245b4cd9a 100644
--- a/examples/layer-group.js
+++ b/examples/layer-group.js
@@ -1,6 +1,6 @@
 import Map from '../src/ol/Map.js';
 import View from '../src/ol/View.js';
-import _ol_layer_Group_ from '../src/ol/layer/Group.js';
+import LayerGroup from '../src/ol/layer/Group.js';
 import TileLayer from '../src/ol/layer/Tile.js';
 import {fromLonLat} from '../src/ol/proj.js';
 import OSM from '../src/ol/source/OSM.js';
@@ -10,7 +10,7 @@ var map = new Map({
   layers: [
     new TileLayer({
       source: new OSM()
-    }), new _ol_layer_Group_({
+    }), new LayerGroup({
       layers: [
         new TileLayer({
           source: new TileJSON({
@@ -49,7 +49,7 @@ function bindInputs(layerid, layer) {
 }
 map.getLayers().forEach(function(layer, i) {
   bindInputs('#layer' + i, layer);
-  if (layer instanceof _ol_layer_Group_) {
+  if (layer instanceof LayerGroup) {
     layer.getLayers().forEach(function(sublayer, j) {
       bindInputs('#layer' + i + j, sublayer);
     });
diff --git a/src/ol/PluggableMap.js b/src/ol/PluggableMap.js
index f73b68121e..70e72796ca 100644
--- a/src/ol/PluggableMap.js
+++ b/src/ol/PluggableMap.js
@@ -23,7 +23,7 @@ import EventType from './events/EventType.js';
 import {createEmpty, clone, createOrUpdateEmpty, equals, getForViewAndSize, isEmpty} from './extent.js';
 import {TRUE} from './functions.js';
 import _ol_has_ from './has.js';
-import _ol_layer_Group_ from './layer/Group.js';
+import LayerGroup from './layer/Group.js';
 import {getMapRendererPlugins} from './plugins.js';
 import RendererType from './renderer/Type.js';
 import _ol_size_ from './size.js';
@@ -1404,8 +1404,8 @@ function createOptionsInternal(options) {
    */
   var values = {};
 
-  var layerGroup = (options.layers instanceof _ol_layer_Group_) ?
-    options.layers : new _ol_layer_Group_({layers: options.layers});
+  var layerGroup = (options.layers instanceof LayerGroup) ?
+    options.layers : new LayerGroup({layers: options.layers});
   values[MapProperty.LAYERGROUP] = layerGroup;
 
   values[MapProperty.TARGET] = options.target;
diff --git a/src/ol/layer/Group.js b/src/ol/layer/Group.js
index 978621f67f..908bb5b7f8 100644
--- a/src/ol/layer/Group.js
+++ b/src/ol/layer/Group.js
@@ -35,7 +35,7 @@ var Property = {
  * @param {olx.layer.GroupOptions=} opt_options Layer options.
  * @api
  */
-var _ol_layer_Group_ = function(opt_options) {
+var LayerGroup = function(opt_options) {
 
   var options = opt_options || {};
   var baseOptions = /** @type {olx.layer.GroupOptions} */
@@ -78,13 +78,13 @@ var _ol_layer_Group_ = function(opt_options) {
 
 };
 
-inherits(_ol_layer_Group_, BaseLayer);
+inherits(LayerGroup, BaseLayer);
 
 
 /**
  * @private
  */
-_ol_layer_Group_.prototype.handleLayerChange_ = function() {
+LayerGroup.prototype.handleLayerChange_ = function() {
   this.changed();
 };
 
@@ -93,7 +93,7 @@ _ol_layer_Group_.prototype.handleLayerChange_ = function() {
  * @param {ol.events.Event} event Event.
  * @private
  */
-_ol_layer_Group_.prototype.handleLayersChanged_ = function(event) {
+LayerGroup.prototype.handleLayersChanged_ = function(event) {
   this.layersListenerKeys_.forEach(_ol_events_.unlistenByKey);
   this.layersListenerKeys_.length = 0;
 
@@ -129,7 +129,7 @@ _ol_layer_Group_.prototype.handleLayersChanged_ = function(event) {
  * @param {ol.Collection.Event} collectionEvent Collection event.
  * @private
  */
-_ol_layer_Group_.prototype.handleLayersAdd_ = function(collectionEvent) {
+LayerGroup.prototype.handleLayersAdd_ = function(collectionEvent) {
   var layer = /** @type {ol.layer.Base} */ (collectionEvent.element);
   var key = getUid(layer).toString();
   this.listenerKeys_[key] = [
@@ -146,7 +146,7 @@ _ol_layer_Group_.prototype.handleLayersAdd_ = function(collectionEvent) {
  * @param {ol.Collection.Event} collectionEvent Collection event.
  * @private
  */
-_ol_layer_Group_.prototype.handleLayersRemove_ = function(collectionEvent) {
+LayerGroup.prototype.handleLayersRemove_ = function(collectionEvent) {
   var layer = /** @type {ol.layer.Base} */ (collectionEvent.element);
   var key = getUid(layer).toString();
   this.listenerKeys_[key].forEach(_ol_events_.unlistenByKey);
@@ -163,7 +163,7 @@ _ol_layer_Group_.prototype.handleLayersRemove_ = function(collectionEvent) {
  * @observable
  * @api
  */
-_ol_layer_Group_.prototype.getLayers = function() {
+LayerGroup.prototype.getLayers = function() {
   return (/** @type {!ol.Collection.<ol.layer.Base>} */ this.get(Property.LAYERS));
 };
 
@@ -176,7 +176,7 @@ _ol_layer_Group_.prototype.getLayers = function() {
  * @observable
  * @api
  */
-_ol_layer_Group_.prototype.setLayers = function(layers) {
+LayerGroup.prototype.setLayers = function(layers) {
   this.set(Property.LAYERS, layers);
 };
 
@@ -184,7 +184,7 @@ _ol_layer_Group_.prototype.setLayers = function(layers) {
 /**
  * @inheritDoc
  */
-_ol_layer_Group_.prototype.getLayersArray = function(opt_array) {
+LayerGroup.prototype.getLayersArray = function(opt_array) {
   var array = opt_array !== undefined ? opt_array : [];
   this.getLayers().forEach(function(layer) {
     layer.getLayersArray(array);
@@ -196,7 +196,7 @@ _ol_layer_Group_.prototype.getLayersArray = function(opt_array) {
 /**
  * @inheritDoc
  */
-_ol_layer_Group_.prototype.getLayerStatesArray = function(opt_states) {
+LayerGroup.prototype.getLayerStatesArray = function(opt_states) {
   var states = opt_states !== undefined ? opt_states : [];
 
   var pos = states.length;
@@ -231,8 +231,8 @@ _ol_layer_Group_.prototype.getLayerStatesArray = function(opt_states) {
 /**
  * @inheritDoc
  */
-_ol_layer_Group_.prototype.getSourceState = function() {
+LayerGroup.prototype.getSourceState = function() {
   return SourceState.READY;
 };
 
-export default _ol_layer_Group_;
+export default LayerGroup;
diff --git a/test/spec/ol/layer/group.test.js b/test/spec/ol/layer/group.test.js
index b2c1097772..dd089e827f 100644
--- a/test/spec/ol/layer/group.test.js
+++ b/test/spec/ol/layer/group.test.js
@@ -2,7 +2,7 @@ import {getUid} from '../../../../src/ol/index.js';
 import {stableSort} from '../../../../src/ol/array.js';
 import _ol_Collection_ from '../../../../src/ol/Collection.js';
 import * as _ol_extent_ from '../../../../src/ol/extent.js';
-import _ol_layer_Group_ from '../../../../src/ol/layer/Group.js';
+import LayerGroup from '../../../../src/ol/layer/Group.js';
 import _ol_layer_Layer_ from '../../../../src/ol/layer/Layer.js';
 import _ol_obj_ from '../../../../src/ol/obj.js';
 import MapRenderer from '../../../../src/ol/renderer/Map.js';
@@ -16,7 +16,7 @@ describe('ol.layer.Group', function() {
     var layerGroup;
 
     beforeEach(function() {
-      layerGroup = new _ol_layer_Group_();
+      layerGroup = new LayerGroup();
     });
 
     afterEach(function() {
@@ -24,7 +24,7 @@ describe('ol.layer.Group', function() {
     });
 
     it('creates an instance', function() {
-      expect(layerGroup).to.be.a(_ol_layer_Group_);
+      expect(layerGroup).to.be.a(LayerGroup);
     });
 
     it('provides default opacity', function() {
@@ -65,7 +65,7 @@ describe('ol.layer.Group', function() {
           projection: 'EPSG:4326'
         })
       });
-      group = new _ol_layer_Group_({
+      group = new LayerGroup({
         layers: [layer]
       });
       listener = sinon.spy();
@@ -104,7 +104,7 @@ describe('ol.layer.Group', function() {
           projection: 'EPSG:4326'
         })
       });
-      group = new _ol_layer_Group_({
+      group = new LayerGroup({
         layers: [layer]
       });
       listener = sinon.spy();
@@ -142,7 +142,7 @@ describe('ol.layer.Group', function() {
           projection: 'EPSG:4326'
         })
       });
-      var layerGroup = new _ol_layer_Group_({
+      var layerGroup = new LayerGroup({
         layers: [layer],
         opacity: 0.5,
         visible: false,
@@ -182,7 +182,7 @@ describe('ol.layer.Group', function() {
       });
 
       var groupExtent = [-10, -5, 10, 5];
-      var layerGroup = new _ol_layer_Group_({
+      var layerGroup = new LayerGroup({
         layers: [layer],
         opacity: 0.5,
         visible: false,
@@ -221,7 +221,7 @@ describe('ol.layer.Group', function() {
     var layerGroup;
 
     beforeEach(function() {
-      layerGroup = new _ol_layer_Group_();
+      layerGroup = new LayerGroup();
     });
 
     afterEach(function() {
@@ -285,7 +285,7 @@ describe('ol.layer.Group', function() {
 
     it('listen / unlisten for layers added to the collection', function() {
       var layers = new _ol_Collection_();
-      var layerGroup = new _ol_layer_Group_({
+      var layerGroup = new LayerGroup({
         layers: layers
       });
       expect(Object.keys(layerGroup.listenerKeys_).length).to.eql(0);
@@ -316,7 +316,7 @@ describe('ol.layer.Group', function() {
         })
       });
       var layers = new _ol_Collection_([layer]);
-      var layerGroup = new _ol_layer_Group_();
+      var layerGroup = new LayerGroup();
 
       layerGroup.setLayers(layers);
       expect(layerGroup.getLayers()).to.be(layers);
@@ -332,7 +332,7 @@ describe('ol.layer.Group', function() {
   describe('#getLayerStatesArray', function() {
 
     it('returns an empty array if no layer', function() {
-      var layerGroup = new _ol_layer_Group_();
+      var layerGroup = new LayerGroup();
 
       var layerStatesArray = layerGroup.getLayerStatesArray();
       expect(layerStatesArray).to.be.a(Array);
@@ -363,7 +363,7 @@ describe('ol.layer.Group', function() {
     });
 
     it('does not transform layerStates by default', function() {
-      var layerGroup = new _ol_layer_Group_({
+      var layerGroup = new LayerGroup({
         layers: [layer1, layer2]
       });
 
@@ -386,7 +386,7 @@ describe('ol.layer.Group', function() {
 
     it('uses the layer group extent if layer has no extent', function() {
       var groupExtent = [-10, -5, 10, 5];
-      var layerGroup = new _ol_layer_Group_({
+      var layerGroup = new LayerGroup({
         extent: groupExtent,
         layers: [layer1]
       });
@@ -397,7 +397,7 @@ describe('ol.layer.Group', function() {
 
     it('uses the intersection of group and child extent', function() {
       var groupExtent = [-10, -5, 10, 5];
-      var layerGroup = new _ol_layer_Group_({
+      var layerGroup = new LayerGroup({
         extent: groupExtent,
         layers: [layer3]
       });
@@ -408,7 +408,7 @@ describe('ol.layer.Group', function() {
     });
 
     it('transforms layerStates correctly', function() {
-      var layerGroup = new _ol_layer_Group_({
+      var layerGroup = new LayerGroup({
         layers: [layer1, layer2],
         opacity: 0.5,
         visible: false,
@@ -446,7 +446,7 @@ describe('ol.layer.Group', function() {
     });
 
     it('let order of layers without Z-index unchanged', function() {
-      var layerGroup = new _ol_layer_Group_({
+      var layerGroup = new LayerGroup({
         layers: [layer1, layer2]
       });
 
@@ -474,7 +474,7 @@ describe('ol.layer.Group', function() {
       });
       layerM1.setZIndex(-1);
 
-      var layerGroup = new _ol_layer_Group_({
+      var layerGroup = new LayerGroup({
         layers: [layer1, layer10, layer2, layerM1]
       });