Update to drupal 8.0.0-rc1. For more information, see https://www.drupal.org/node/2582663

vendor/behat/mink/driver-testsuite/tests/Basic/VisibilityTest.php

@@ -0,0 +1,20 @@
+<?php
+
+namespace Behat\Mink\Tests\Driver\Basic;
+
+use Behat\Mink\Tests\Driver\TestCase;
+
+class VisibilityTest extends TestCase
+{
+    public function testVisibility()
+    {
+        $this->getSession()->visit($this->pathTo('/js_test.html'));
+        $webAssert = $this->getAssertSession();
+
+        $clicker = $webAssert->elementExists('css', '.elements div#clicker');
+        $invisible = $webAssert->elementExists('css', '#invisible');
+
+        $this->assertFalse($invisible->isVisible());
+        $this->assertTrue($clicker->isVisible());
+    }
+}