diff --git a/core/tests/Drupal/FunctionalTests/AssertLegacyTrait.php b/core/tests/Drupal/FunctionalTests/AssertLegacyTrait.php
index 5785a7d..4fc5cb0 100644
--- a/core/tests/Drupal/FunctionalTests/AssertLegacyTrait.php
+++ b/core/tests/Drupal/FunctionalTests/AssertLegacyTrait.php
@@ -2,6 +2,7 @@
 
 namespace Drupal\FunctionalTests;
 
+use Behat\Mink\Selector\Xpath\Escaper;
 use Drupal\KernelTests\AssertLegacyTrait as BaseAssertLegacyTrait;
 
 /**
@@ -464,6 +465,103 @@ protected function assertNoFieldChecked($id) {
   }
 
   /**
+   * Asserts that a field exists in the current page by the given XPath.
+   *
+   * @param string $xpath
+   *   XPath used to find the field.
+   * @param string $value
+   *   (optional) Value of the field to assert. You may pass in NULL (default)
+   *   to skip checking the actual value, while still checking that the field
+   *   exists.
+   * @param string $message
+   *   (optional) A message to display with the assertion. Do not translate
+   *   messages with t().
+   *
+   * @deprecated Scheduled for removal in Drupal 9.0.0.
+   *   Use $this->xpath() instead and check the values directly in the test.
+   */
+  protected function assertFieldByXPath($xpath, $value = NULL, $message = '') {
+    $fields = $this->xpath($xpath);
+
+    $this->assertFieldsByValue($fields, $value, $message);
+  }
+
+  /**
+   * Asserts that a field does not exist or its value does not match, by XPath.
+   *
+   * @param string $xpath
+   *   XPath used to find the field.
+   * @param string $value
+   *   (optional) Value of the field, to assert that the field's value on the
+   *   page does not match it.
+   * @param string $message
+   *   (optional) A message to display with the assertion. Do not translate
+   *   messages with t().
+   *
+   * @deprecated Scheduled for removal in Drupal 9.0.0.
+   *   Use $this->assertSession()->fieldNotExists() or
+   *   $this->assertSession()->fieldValueNotEquals() instead.
+   */
+  protected function assertNoFieldByXPath($xpath, $value = NULL, $message = '') {
+    $fields = $this->xpath($xpath);
+
+    // If value specified then check array for match.
+    $found = TRUE;
+    if (isset($value)) {
+      $found = FALSE;
+      if ($fields) {
+        foreach ($fields as $field) {
+          if ($field->getAttribute('value') == $value) {
+            $found = TRUE;
+          }
+        }
+      }
+    }
+    return $this->assertFalse($fields && $found, $message);
+  }
+
+  /**
+   * Asserts that a field exists in the current page with a given Xpath result.
+   *
+   * @param \Behat\Mink\Element\NodeElement[] $fields
+   *   Xml elements.
+   * @param string $value
+   *   (optional) Value of the field to assert. You may pass in NULL (default) to skip
+   *   checking the actual value, while still checking that the field exists.
+   * @param string $message
+   *   (optional) A message to display with the assertion. Do not translate
+   *   messages with t().
+   *
+   * @deprecated Scheduled for removal in Drupal 9.0.0.
+   *   Iterate over the fields yourself instead and directly check the values in
+   *   the test.
+   */
+  protected function assertFieldsByValue($fields, $value = NULL, $message = '') {
+    // If value specified then check array for match.
+    $found = TRUE;
+    if (isset($value)) {
+      $found = FALSE;
+      if ($fields) {
+        foreach ($fields as $field) {
+          if ($field->getAttribute('value') == $value) {
+            // Input element with correct value.
+            $found = TRUE;
+          }
+          elseif ($field->find('xpath', '//option[@value = ' . (new Escaper())->escapeLiteral($value) . ' and @selected = "selected"]')) {
+            // Select element with an option.
+            $found = TRUE;
+          }
+          elseif ($field->getText() == $value) {
+            // Text area with correct text.
+            $found = TRUE;
+          }
+        }
+      }
+    }
+    $this->assertTrue($fields && $found, $message);
+  }
+
+  /**
    * Passes if the raw text IS found escaped on the loaded page, fail otherwise.
    *
    * Raw text refers to the raw HTML that the page generated.
diff --git a/core/tests/Drupal/FunctionalTests/BrowserTestBaseTest.php b/core/tests/Drupal/FunctionalTests/BrowserTestBaseTest.php
index e4979d3..0024048 100644
--- a/core/tests/Drupal/FunctionalTests/BrowserTestBaseTest.php
+++ b/core/tests/Drupal/FunctionalTests/BrowserTestBaseTest.php
@@ -86,4 +86,22 @@ public function testError() {
     $this->drupalGet('test-error');
   }
 
+  /**
+   * Tests that legacy assertions work.
+   */
+  public function testAssertions() {
+    $account = $this->drupalCreateUser(['administer users'], 'test');
+    $this->drupalLogin($account);
+
+    $this->drupalGet('admin/people');
+    $this->assertFieldByXpath('//table/tbody/tr[2]/td[1]/span', $account->getAccountName());
+
+    $this->drupalGet('user/' . $account->id() . '/edit');
+    $this->assertFieldByXpath("//input[@id = 'edit-name']", $account->getAccountName());
+    $this->assertFieldByXpath("//select[@id = 'edit-timezone--2']", 'Australia/Sydney');
+
+    $this->assertNoFieldByXPath('//notexisting');
+    $this->assertNoFieldByXpath("//input[@id = 'edit-name']", 'wrong value');
+  }
+
 }