diff -u b/core/tests/Drupal/FunctionalJavascriptTests/JSWebAssert.php b/core/tests/Drupal/FunctionalJavascriptTests/JSWebAssert.php
--- b/core/tests/Drupal/FunctionalJavascriptTests/JSWebAssert.php
+++ b/core/tests/Drupal/FunctionalJavascriptTests/JSWebAssert.php
@@ -367,25 +367,23 @@
   }
 
   /**
-   * The use of statusCodeEquals() is not available in a functional JavaScript test.
+   * The use of statusCodeEquals() is not available.
    *
    * @param int $code
    *
-   * @throws \Exception
+   * @throws \Behat\Mink\Exception\UnsupportedDriverActionException
    *   Throws an exception on use.
    */
   public function statusCodeEquals($code) {
-    $this->statusCodeNotEquals(3);
-
     throw new UnsupportedDriverActionException('The use of statusCodeEquals() is not available in a functional JavaScript test.');
   }
 
   /**
-   * The use of statusCodeNotEquals() is not available in a functional JavaScript test.
+   * The use of statusCodeNotEquals() is not available.
    *
    * @param int $code
    *
-   * @throws \Exception
+   * @throws \Behat\Mink\Exception\UnsupportedDriverActionException
    *   Throws an exception on use.
    */
   public function statusCodeNotEquals($code) {
@@ -393,12 +391,12 @@
   }
 
   /**
-   * The use of responseHeaderEquals() is not available in a functional JavaScript test.
+   * The use of responseHeaderEquals() is not available.
    *
    * @param string $name
    * @param string $value
    *
-   * @throws \Exception
+   * @throws \Behat\Mink\Exception\UnsupportedDriverActionException
    *   Throws an exception on use.
    */
   public function responseHeaderEquals($name, $value) {
@@ -408,13 +406,14 @@
   /**
-   * The use of responseHeaderNotEquals() is not available in a functional JavaScript test.
+   * The use of responseHeaderNotEquals() is not available.
    *
    * @param string $name
    * @param string $value
    *
-   * @throws \Exception
+   * @throws \Behat\Mink\Exception\UnsupportedDriverActionException
    *   Throws an exception on use.
    */
   public function responseHeaderNotEquals($name, $value) {
     throw new UnsupportedDriverActionException('The use of responseHeaderEquals() is not available in a functional JavaScript test.');
   }
+
 }