only in patch2:
unchanged:
--- a/tests/src/Functional/RequestHelperTrait.php
+++ b/tests/src/Functional/RequestHelperTrait.php
@@ -3,6 +3,7 @@
 namespace Drupal\Tests\simple_oauth\Functional;
 
 use Drupal\Core\Url;
+use GuzzleHttp\RequestOptions;
 
 /**
  *
@@ -45,6 +46,9 @@ trait RequestHelperTrait {
    * @return mixed
    */
   protected function get(Url $url, $options = []) {
+    $options += [
+      RequestOptions::HTTP_ERRORS => FALSE,
+    ];
     $session = $this->getSession();
     $get_url = $this->getAbsoluteUrl($url->toString());
     $session->setCookie('SIMPLETEST_USER_AGENT', drupal_generate_test_ua($this->databasePrefix));