diff --git a/core/tests/Drupal/FunctionalJavascriptTests/JavascriptTestBase.php b/core/tests/Drupal/FunctionalJavascriptTests/JavascriptTestBase.php
index b4972f4..eecafb0 100644
--- a/core/tests/Drupal/FunctionalJavascriptTests/JavascriptTestBase.php
+++ b/core/tests/Drupal/FunctionalJavascriptTests/JavascriptTestBase.php
@@ -54,10 +54,10 @@ protected function tearDown() {
       if (!$result) {
         // If the wait is unsuccessful, there may still be an AJAX request in
         // progress. If we tear down now, then this AJAX request may fail with
-        // missing database tables, because tear down will have removed them. Rather
-        // than allow it to fail, throw an explicit exception now explaining what
-        // the problem is.
-        throw new \RuntimeException('Unfinished AJAX requests whilst tearing down a test');
+        // missing database tables, because tear down will have removed them.
+        // Rather than allow it to fail, throw an explicit exception now
+        // explaining what the problem is.
+        throw new \RuntimeException('Unfinished AJAX requests while tearing down a test');
       }
     }
     parent::tearDown();