diff --git a/core/modules/toolbar/tests/src/FunctionalJavascript/ToolbarIntegrationTest.php b/core/modules/toolbar/tests/src/FunctionalJavascript/ToolbarIntegrationTest.php
index f44c224..c3b3d9a 100644
--- a/core/modules/toolbar/tests/src/FunctionalJavascript/ToolbarIntegrationTest.php
+++ b/core/modules/toolbar/tests/src/FunctionalJavascript/ToolbarIntegrationTest.php
@@ -23,30 +23,29 @@ public function testToolbarToggling() {
     $admin_user = $this->drupalCreateUser([
       'access toolbar',
       'administer site configuration',
-      'access content overview'
+      'access content overview',
     ]);
     $this->drupalLogin($admin_user);
 
     $this->drupalGet('<front>');
+    $page = $this->getSession()->getPage();
 
     // Test that it is possible to toggle the toolbar tray.
-    $this->assertElementVisible('#toolbar-link-system-admin_content', 'Toolbar tray is open by default.');
-    $this->click('#toolbar-item-administration');
-    $this->assertElementNotVisible('#toolbar-link-system-admin_content', 'Toolbar tray is closed after clicking the "Manage" button.');
-    $this->click('#toolbar-item-administration');
-    $this->assertElementVisible('#toolbar-link-system-admin_content', 'Toolbar tray is visible again after clicking the "Manage" button a second time.');
+    $content = $page->findLink('Content');
+    $this->assertTrue($content->isVisible(), 'Toolbar tray is open by default.');
+    $page->clickLink('Manage');
+    $this->assertFalse($content->isVisible(), 'Toolbar tray is closed after clicking the "Manage" link.');
+    $page->clickLink('Manage');
+    $this->assertTrue($content->isVisible(), 'Toolbar tray is visible again after clicking the "Manage" button a second time.');
 
     // Test toggling the toolbar tray between horizontal and vertical.
-    $this->assertElementVisible('#toolbar-item-administration-tray.toolbar-tray-horizontal', 'Toolbar tray is horizontally oriented by default.');
-    $this->assertElementNotPresent('#toolbar-item-administration-tray.toolbar-tray-vertical', 'Toolbar tray is not vertically oriented by default.');
+    $tray = $page->findById('toolbar-item-administration-tray');
+    $this->assertFalse($tray->hasClass('toolbar-tray-vertical'), 'Toolbar tray is not vertically oriented by default.');
+    $page->pressButton('Vertical orientation');
+    $this->assertTrue($tray->hasClass('toolbar-tray-vertical'), 'After toggling the orientation the toolbar tray is now displayed vertically.');
 
-    $this->click('#toolbar-item-administration-tray button.toolbar-icon-toggle-vertical');
-    $this->assertJsCondition('jQuery("#toolbar-item-administration-tray").hasClass("toolbar-tray-vertical")');
-    $this->assertElementVisible('#toolbar-item-administration-tray.toolbar-tray-vertical', 'After toggling the orientation the toolbar tray is now displayed vertically.');
-
-    $this->click('#toolbar-item-administration-tray button.toolbar-icon-toggle-horizontal');
-    $this->assertJsCondition('jQuery("#toolbar-item-administration-tray").hasClass("toolbar-tray-horizontal")');
-    $this->assertElementVisible('#toolbar-item-administration-tray.toolbar-tray-horizontal', 'After toggling the orientation a second time the toolbar tray is displayed horizontally again.');
+    $page->pressButton('Horizontal orientation');
+    $this->assertTrue($tray->hasClass('toolbar-tray-horizontal'), 'After toggling the orientation a second time the toolbar tray is displayed horizontally again.');
   }
 
 }
diff --git a/core/tests/Drupal/FunctionalJavascriptTests/JavascriptTestBase.php b/core/tests/Drupal/FunctionalJavascriptTests/JavascriptTestBase.php
index 41e5b79..928e37d 100644
--- a/core/tests/Drupal/FunctionalJavascriptTests/JavascriptTestBase.php
+++ b/core/tests/Drupal/FunctionalJavascriptTests/JavascriptTestBase.php
@@ -35,30 +35,6 @@ protected function initMink() {
   }
 
   /**
-   * Asserts that the element with the given CSS selector is visible.
-   *
-   * @param string $css_selector
-   *   The CSS selector identifying the element to check.
-   * @param string $message
-   *   Optional message to show alongside the assertion.
-   */
-  protected function assertElementVisible($css_selector, $message = '') {
-    $this->assertTrue($this->getSession()->getDriver()->isVisible(CssSelector::toXPath($css_selector)), $message);
-  }
-
-  /**
-   * Asserts that the element with the given CSS selector is not visible.
-   *
-   * @param string $css_selector
-   *   The CSS selector identifying the element to check.
-   * @param string $message
-   *   Optional message to show alongside the assertion.
-   */
-  protected function assertElementNotVisible($css_selector, $message = '') {
-    $this->assertFalse($this->getSession()->getDriver()->isVisible(CssSelector::toXPath($css_selector)), $message);
-  }
-
-  /**
    * Waits for the given time or until the given JS condition becomes TRUE.
    *
    * @param string $condition
@@ -75,7 +51,7 @@ protected function assertElementNotVisible($css_selector, $message = '') {
    */
   protected function assertJsCondition($condition, $timeout = 1000, $message = '') {
     $message = $message ?: "Javascript condition met:\n" . $condition;
-    $result = $this->getSession()->getDriver()->wait($timeout, $condition);
+    $result = $this->getSession()->wait($timeout, $condition);
     $this->assertTrue($result, $message);
   }
 
diff --git a/core/tests/Drupal/Tests/BrowserTestBase.php b/core/tests/Drupal/Tests/BrowserTestBase.php
index 8d8ea2b..9c5c992 100644
--- a/core/tests/Drupal/Tests/BrowserTestBase.php
+++ b/core/tests/Drupal/Tests/BrowserTestBase.php
@@ -1441,40 +1441,6 @@ protected function drupalUserIsLoggedIn(UserInterface $account) {
   }
 
   /**
-   * Asserts that the element with the given CSS selector is present.
-   *
-   * @param string $css_selector
-   *   The CSS selector identifying the element to check.
-   * @param string $message
-   *   Optional message to show alongside the assertion.
-   */
-  protected function assertElementPresent($css_selector, $message = '') {
-    $this->assertNotEmpty($this->getSession()->getDriver()->find(CssSelector::toXPath($css_selector)), $message);
-  }
-
-  /**
-   * Asserts that the element with the given CSS selector is not present.
-   *
-   * @param string $css_selector
-   *   The CSS selector identifying the element to check.
-   * @param string $message
-   *   Optional message to show alongside the assertion.
-   */
-  protected function assertElementNotPresent($css_selector, $message = '') {
-    $this->assertEmpty($this->getSession()->getDriver()->find(CssSelector::toXPath($css_selector)), $message);
-  }
-
-  /**
-   * Clicks the element with the given CSS selector.
-   *
-   * @param string $css_selector
-   *   The CSS selector identifying the element to click.
-   */
-  protected function click($css_selector) {
-    $this->getSession()->getDriver()->click(CssSelector::toXPath($css_selector));
-  }
-
-  /**
    * Prevents serializing any properties.
    *
    * Browser tests are run in a separate process. To do this PHPUnit creates a