diff --git a/core/tests/Drupal/FunctionalJavascriptTests/JavascriptTestBase.php b/core/tests/Drupal/FunctionalJavascriptTests/JavascriptTestBase.php
index 0d3da18..e6689ce 100644
--- a/core/tests/Drupal/FunctionalJavascriptTests/JavascriptTestBase.php
+++ b/core/tests/Drupal/FunctionalJavascriptTests/JavascriptTestBase.php
@@ -144,17 +144,23 @@ public function assertSession($name = NULL) {
   }
 
   /**
-   * Gets Drupal settings from session and parses into a PHP array.
+   * Gets the current Drupal javascript settings and parses into an array.
+   *
+   * Unlike BrowserTestBase::getDrupalSettings(), this implementation reads the
+   * current values of drupalSettings, capturing all changes made via javascript
+   * after the page was loaded.
    *
    * @return array
-   *   The Drupal settings array.
+   *   The Drupal javascript settings array.
+   *
+   * @see \Drupal\Tests\BrowserTestBase::getDrupalSettings()
    */
   protected function getDrupalSettings() {
     $script = <<<EndOfScript
 (function () {
   if (typeof drupalSettings !== 'undefined') {
     return drupalSettings;
-   }
+  }
 })()
 EndOfScript;