diff --git a/core/tests/Drupal/FunctionalJavascriptTests/Ajax/AjaxFormPageCacheTest.php b/core/tests/Drupal/FunctionalJavascriptTests/Ajax/AjaxFormPageCacheTest.php
index 4b61a81436..5f63f7609a 100644
--- a/core/tests/Drupal/FunctionalJavascriptTests/Ajax/AjaxFormPageCacheTest.php
+++ b/core/tests/Drupal/FunctionalJavascriptTests/Ajax/AjaxFormPageCacheTest.php
@@ -44,7 +44,8 @@ public function testSimpleAJAXFormValue() {
     $this->assertEquals($this->drupalGetHeader('X-Drupal-Cache'), 'MISS', 'Page was not cached.');
     $build_id_initial = $this->getFormBuildId();
 
-    // Changing the value of a select input element, triggers a AJAX request/response.
+    // Changing the value of a select input element, triggers a AJAX
+    // request/response.
     //
     // The callback on the form responds with three AJAX command :-
     // UpdateBuildIdCommand
@@ -54,7 +55,8 @@ public function testSimpleAJAXFormValue() {
     $session->getPage()->selectFieldOption('select', 'green');
 
     // Wait for the DOM to update.
-    // The HtmlCommand will update #ajax_selected_color to reflect the color change.
+    // The HtmlCommand will update #ajax_selected_color to reflect the color
+    // change.
     $green_div = $this->assertSession()->waitForElement('css', "#ajax_selected_color div:contains('green')");
     $this->assertNotNull($green_div, 'DOM update: The selected color DIV is green.');
 
@@ -62,7 +64,8 @@ public function testSimpleAJAXFormValue() {
     $build_id_first_ajax = $this->getFormBuildId();
     $this->assertNotEquals($build_id_initial, $build_id_first_ajax, 'Build id is changed in the form_build_id element on first AJAX submission');
 
-    // Changing the value of a select input element, triggers a AJAX request/response.
+    // Changing the value of a select input element, triggers a AJAX
+    // request/response.
     $session->getPage()->selectFieldOption('select', 'red');
 
     // Wait for the DOM to update.
@@ -80,7 +83,8 @@ public function testSimpleAJAXFormValue() {
     $build_id_from_cache_initial = $this->getFormBuildId();
     $this->assertEquals($build_id_initial, $build_id_from_cache_initial, 'Build id is the same as on the first request');
 
-    // Changing the value of a select input element, triggers a AJAX request/response.
+    // Changing the value of a select input element, triggers a AJAX
+    // request/response.
     $session->getPage()->selectFieldOption('select', 'green');
 
     // Wait for the DOM to update.
@@ -110,7 +114,8 @@ public function testSimpleAJAXFormValue() {
    */
   public function testAjaxElementValidation() {
     $this->drupalGet('ajax_validation_test');
-    // Changing the value of the textfield will trigger an AJAX request/response.
+    // Changing the value of the textfield will trigger an AJAX
+    // request/response.
     $this->getSession()->getPage()->fillField('drivertext', 'some dumb text');
 
     // When the AJAX command updates the DOM a <ul> unsorted list