diff --git a/test/spec/ol/assertionerror.test.js b/test/spec/ol/assertionerror.test.js
index 6ff509c588..d422ceff6a 100644
--- a/test/spec/ol/assertionerror.test.js
+++ b/test/spec/ol/assertionerror.test.js
@@ -10,11 +10,9 @@ describe('ol.AssertionError', function() {
   });
 
   it('generates a message with a versioned url', function() {
-    var origVersion = ol.VERSION;
-    ol.VERSION = 'foo';
     var error = new ol.AssertionError(42);
-    expect(error.message).to.be('Assertion failed. See https://openlayers.org/en/foo/doc/errors/#42 for details.');
-    ol.VERSION = origVersion;
+    var path = ol.VERSION ? ol.VERSION.split('-')[0] : 'latest';
+    expect(error.message).to.be('Assertion failed. See https://openlayers.org/en/' + path + '/doc/errors/#42 for details.');
   });
 
   it('has an error code', function() {