Issue #3262244: HEAD is broken because I made Zeus mad

tests/src/Functional/ReadinessValidationTest.php

@@ -422,6 +422,10 @@ class ReadinessValidationTest extends AutomaticUpdatesFunctionalTestBase {
     }
     catch (ResponseTextException $e) {
       file_put_contents($this->htmlOutputDirectory . '/fail.html', $page->getContent());
+      if ($page->hasLink('the error page')) {
+        $page->clickLink('the error page');
+        file_put_contents($this->htmlOutputDirectory . '/fail2.html', $page->getContent());
+      }
       throw $e;
     }