diff --git a/core/tests/Drupal/Tests/BrowserTestBase.php b/core/tests/Drupal/Tests/BrowserTestBase.php
index d38db65..6945860 100644
--- a/core/tests/Drupal/Tests/BrowserTestBase.php
+++ b/core/tests/Drupal/Tests/BrowserTestBase.php
@@ -357,8 +357,13 @@ protected function initMink() {
     if ($driver instanceof GoutteDriver) {
       // Turn off curl timeout. Having a timeout is not a problem in a normal
       // test running, but it is a problem when debugging.
+      // Also, disable SSL peer verification so that testing under HTTPS always
+      // works.
       /** @var \GuzzleHttp\Client $client */
-      $client = $this->container->get('http_client_factory')->fromOptions(['timeout' => NULL]);
+      $client = $this->container->get('http_client_factory')->fromOptions([
+        'timeout' => NULL,
+        'verify' => FALSE,
+      ]);
       $driver->getClient()->setClient($client);
     }