core/tests/Drupal/Tests/Listeners/DeprecationListenerTrait.php | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/core/tests/Drupal/Tests/Listeners/DeprecationListenerTrait.php b/core/tests/Drupal/Tests/Listeners/DeprecationListenerTrait.php
index 3c76756bd5..e1835e0dd2 100644
--- a/core/tests/Drupal/Tests/Listeners/DeprecationListenerTrait.php
+++ b/core/tests/Drupal/Tests/Listeners/DeprecationListenerTrait.php
@@ -140,6 +140,8 @@ public static function getSkippedDeprecations() {
       // This deprecation comes from behat/mink-browserkit-driver when updating
       // symfony/browser-kit to 4.3+.
       'The "Symfony\Component\BrowserKit\Response::getStatus()" method is deprecated since Symfony 4.3, use getStatusCode() instead.',
+      // @todo Remove in …
+      'Drupal\Tests\BrowserTestBase::$theme is required in drupal:9.0.0. See https://www.drupal.org/node/2352949'
     ];
   }