diff --git a/test/spec/ol/map.test.js b/test/spec/ol/map.test.js
index 1679b0d91a..a1b2a7926e 100644
--- a/test/spec/ol/map.test.js
+++ b/test/spec/ol/map.test.js
@@ -355,38 +355,6 @@ describe('ol.Map', function() {
 
   });
 
-  describe('#updateSize', function() {
-    var map, target;
-
-    beforeEach(function(done) {
-      target = document.createElement('div');
-      document.body.appendChild(target);
-      map = new ol.Map({
-        controls: [],
-        target: target,
-        view: new ol.View({
-          center: [0, 0],
-          zoom: 2
-        })
-      });
-      map.once('postrender', function() {
-        done();
-      });
-    });
-
-    afterEach(function() {
-      map.setTarget(null);
-      document.body.removeChild(target);
-    });
-
-    it('should always generate the same size', function() {
-      var initialSize = map.getSize();
-      map.updateSize();
-      expect(map.getSize()).to.eql(initialSize);
-    });
-
-  });
-
   describe('create interactions', function() {
 
     var options;
diff --git a/test_rendering/spec/ol/map.test.js b/test_rendering/spec/ol/map.test.js
index d8e35ba614..4c391c1c76 100644
--- a/test_rendering/spec/ol/map.test.js
+++ b/test_rendering/spec/ol/map.test.js
@@ -36,6 +36,51 @@ describe('ol.rendering.Map', function() {
     return map;
   }
 
+  describe('#updateSize()', function() {
+    var map, target;
+
+    function createMap(renderer) {
+      target = document.createElement('div');
+      document.body.appendChild(target);
+      map = new ol.Map({
+        renderer: renderer,
+        controls: [],
+        target: target,
+        view: new ol.View({
+          center: [0, 0],
+          zoom: 2
+        })
+      });
+      return map;
+    }
+
+    afterEach(function() {
+      map.setTarget(null);
+      document.body.removeChild(target);
+    });
+
+    it('tests the canvas renderer', function(done) {
+      map = createMap('canvas');
+      map.once('postrender', function() {
+        var initialSize = map.getSize();
+        map.updateSize();
+        expect(map.getSize()).to.eql(initialSize);
+        done();
+      });
+    });
+
+    it('tests the WebGL renderer', function(done) {
+      assertWebGL();
+      map = createMap('webgl');
+      map.once('postrender', function() {
+        var initialSize = map.getSize();
+        map.updateSize();
+        expect(map.getSize()).to.eql(initialSize);
+        done();
+      });
+    });
+  });
+
   describe('#render()', function() {
     afterEach(function() {
       disposeMap(map);