diff --git a/src/ol/VectorImageTile.js b/src/ol/VectorImageTile.js
index a155321a54..0118537438 100644
--- a/src/ol/VectorImageTile.js
+++ b/src/ol/VectorImageTile.js
@@ -285,14 +285,14 @@ VectorImageTile.prototype.finishLoading_ = function() {
   }
 };
 
+export default VectorImageTile;
 
 /**
  * Sets the loader for a tile.
  * @param {ol.VectorTile} tile Vector tile.
  * @param {string} url URL.
  */
-VectorImageTile.defaultLoadFunction = function(tile, url) {
+export function defaultLoadFunction(tile, url) {
   var loader = loadFeaturesXhr(url, tile.getFormat(), tile.onLoad.bind(tile), tile.onError.bind(tile));
   tile.setLoader(loader);
-};
-export default VectorImageTile;
+}
diff --git a/src/ol/source/VectorTile.js b/src/ol/source/VectorTile.js
index 0fe5ace3f7..6b3a38710a 100644
--- a/src/ol/source/VectorTile.js
+++ b/src/ol/source/VectorTile.js
@@ -3,7 +3,7 @@
  */
 import {inherits} from '../index.js';
 import TileState from '../TileState.js';
-import VectorImageTile from '../VectorImageTile.js';
+import VectorImageTile, {defaultLoadFunction} from '../VectorImageTile.js';
 import VectorTile from '../VectorTile.js';
 import _ol_size_ from '../size.js';
 import _ol_source_UrlTile_ from '../source/UrlTile.js';
@@ -46,8 +46,7 @@ var _ol_source_VectorTile_ = function(options) {
     projection: projection,
     state: options.state,
     tileGrid: tileGrid,
-    tileLoadFunction: options.tileLoadFunction ?
-      options.tileLoadFunction : VectorImageTile.defaultLoadFunction,
+    tileLoadFunction: options.tileLoadFunction ? options.tileLoadFunction : defaultLoadFunction,
     tileUrlFunction: options.tileUrlFunction,
     url: options.url,
     urls: options.urls,
diff --git a/test/spec/ol/vectorimagetile.test.js b/test/spec/ol/vectorimagetile.test.js
index da9aaba369..448d233bf2 100644
--- a/test/spec/ol/vectorimagetile.test.js
+++ b/test/spec/ol/vectorimagetile.test.js
@@ -1,5 +1,5 @@
 import TileState from '../../../src/ol/TileState.js';
-import VectorImageTile from '../../../src/ol/VectorImageTile.js';
+import VectorImageTile, {defaultLoadFunction} from '../../../src/ol/VectorImageTile.js';
 import VectorTile from '../../../src/ol/VectorTile.js';
 import _ol_events_ from '../../../src/ol/events.js';
 import GeoJSON from '../../../src/ol/format/GeoJSON.js';
@@ -14,7 +14,7 @@ describe('ol.VectorImageTile', function() {
     var format = new GeoJSON();
     var url = 'spec/ol/data/point.json';
     var tile = new VectorImageTile([0, 0, -1], 0, url, format,
-        VectorImageTile.defaultLoadFunction, [0, 0, -1], function() {
+        defaultLoadFunction, [0, 0, -1], function() {
           return url;
         }, _ol_tilegrid_.createXYZ(), _ol_tilegrid_.createXYZ(), {},
         1, getProjection('EPSG:3857'), VectorTile, function() {});
@@ -37,7 +37,7 @@ describe('ol.VectorImageTile', function() {
     var tile = new VectorImageTile([0, 0, 0] /* one world away */, 0, url, format,
         function(tile, url) {
           sourceTile = tile;
-          VectorImageTile.defaultLoadFunction(tile, url);
+          defaultLoadFunction(tile, url);
         }, [0, 0, -1], function() {
           return url;
         }, _ol_tilegrid_.createXYZ(), _ol_tilegrid_.createXYZ(), {},
@@ -62,7 +62,7 @@ describe('ol.VectorImageTile', function() {
     var format = new GeoJSON();
     var url = 'spec/ol/data/unavailable.json';
     var tile = new VectorImageTile([0, 0, -1], 0, url, format,
-        VectorImageTile.defaultLoadFunction, [0, 0, -1], function() {
+        defaultLoadFunction, [0, 0, -1], function() {
           return url;
         }, _ol_tilegrid_.createXYZ(), _ol_tilegrid_.createXYZ(), {},
         1, getProjection('EPSG:3857'), VectorTile, function() {});
@@ -79,7 +79,7 @@ describe('ol.VectorImageTile', function() {
     var format = new GeoJSON();
     var url = '';
     var tile = new VectorImageTile([0, 0, -1], 0, url, format,
-        VectorImageTile.defaultLoadFunction, [0, 0, -1], function() {},
+        defaultLoadFunction, [0, 0, -1], function() {},
         _ol_tilegrid_.createXYZ(), _ol_tilegrid_.createXYZ(), {},
         1, getProjection('EPSG:3857'), VectorTile, function() {});
 
@@ -101,7 +101,7 @@ describe('ol.VectorImageTile', function() {
     });
     var sourceTiles = {};
     var tile = new VectorImageTile([1, 0, -1], 0, url, format,
-        VectorImageTile.defaultLoadFunction, [1, 0, -1], function(zxy) {
+        defaultLoadFunction, [1, 0, -1], function(zxy) {
           return url;
         }, tileGrid,
         _ol_tilegrid_.createXYZ({extent: [-180, -90, 180, 90], tileSize: 512}),
@@ -115,7 +115,7 @@ describe('ol.VectorImageTile', function() {
     var format = new GeoJSON();
     var url = 'spec/ol/data/point.json';
     var tile = new VectorImageTile([0, 0, 0] /* one world away */, 0, url, format,
-        VectorImageTile.defaultLoadFunction, [0, 0, -1], function() {
+        defaultLoadFunction, [0, 0, -1], function() {
           return url;
         }, _ol_tilegrid_.createXYZ(), _ol_tilegrid_.createXYZ({tileSize: 512}), {},
         1, getProjection('EPSG:3857'), VectorTile, function() {});
@@ -135,7 +135,7 @@ describe('ol.VectorImageTile', function() {
     var format = new GeoJSON();
     var url = 'spec/ol/data/point.json';
     var tile = new VectorImageTile([0, 0, -1], 0, url, format,
-        VectorImageTile.defaultLoadFunction, [0, 0, -1], function() {
+        defaultLoadFunction, [0, 0, -1], function() {
           return url;
         }, _ol_tilegrid_.createXYZ(), _ol_tilegrid_.createXYZ({tileSize: 512}), {},
         1, getProjection('EPSG:3857'), VectorTile, function() {});
diff --git a/test/spec/ol/vectortile.test.js b/test/spec/ol/vectortile.test.js
index 4783d72019..866195b636 100644
--- a/test/spec/ol/vectortile.test.js
+++ b/test/spec/ol/vectortile.test.js
@@ -1,5 +1,5 @@
 import _ol_Feature_ from '../../../src/ol/Feature.js';
-import VectorImageTile from '../../../src/ol/VectorImageTile.js';
+import {defaultLoadFunction} from '../../../src/ol/VectorImageTile.js';
 import VectorTile from '../../../src/ol/VectorTile.js';
 import _ol_events_ from '../../../src/ol/events.js';
 import TextFeature from '../../../src/ol/format/TextFeature.js';
@@ -25,7 +25,7 @@ describe('ol.VectorTile', function() {
     var tile = new VectorTile([0, 0, 0], null, null, format);
     var url = 'spec/ol/data/point.json';
 
-    VectorImageTile.defaultLoadFunction(tile, url);
+    defaultLoadFunction(tile, url);
     var loader = tile.loader_;
     _ol_events_.listen(tile, 'change', function(e) {
       expect(tile.getFeatures().length).to.be.greaterThan(0);