diff --git a/src/ol/source/VectorTile.js b/src/ol/source/VectorTile.js
index e05b933889..112274e30f 100644
--- a/src/ol/source/VectorTile.js
+++ b/src/ol/source/VectorTile.js
@@ -191,7 +191,7 @@ class VectorTile extends UrlTile {
       if (sourceExtent) {
         getIntersection(extent, sourceExtent, extent);
       }
-      const sourceZ = sourceTileGrid.getZForResolution(resolution/*, 1*/);
+      const sourceZ = sourceTileGrid.getZForResolution(resolution, 1);
       const minZoom = sourceTileGrid.getMinZoom();
 
       let loadedZ = sourceZ + 1;
diff --git a/test/spec/ol/source/vectortile.test.js b/test/spec/ol/source/vectortile.test.js
index cfc0462ca4..c8965942f1 100644
--- a/test/spec/ol/source/vectortile.test.js
+++ b/test/spec/ol/source/vectortile.test.js
@@ -105,7 +105,7 @@ describe('ol.source.VectorTile', function() {
 
       function tileUrlFunction(tileCoord) {
         ++requested;
-        if (tileCoord.toString() == '6,27,-57') {
+        if (tileCoord.toString() == '5,13,-29') {
           return tileCoord.join('/');
         }
       }
@@ -154,7 +154,7 @@ describe('ol.source.VectorTile', function() {
       map.renderSync();
       setTimeout(function() {
         expect(requested).to.be.greaterThan(1);
-        expect(loaded).to.eql(['6/27/-57']);
+        expect(loaded).to.eql(['5/13/-29']);
         done();
       }, 0);
     });