diff --git a/core/tests/Drupal/Tests/BrowserTestBase.php b/core/tests/Drupal/Tests/BrowserTestBase.php
index f204d77433..b5c2bcd48c 100644
--- a/core/tests/Drupal/Tests/BrowserTestBase.php
+++ b/core/tests/Drupal/Tests/BrowserTestBase.php
@@ -40,6 +40,9 @@
  * Drupal\Tests\yourmodule\Functional namespace and live in the
  * modules/yourmodule/tests/src/Functional directory.
  *
+ * Tests extending this base class should not use the t() translate function
+ * unless directly testing translation functionality.
+ *
  * @ingroup testing
  */
 abstract class BrowserTestBase extends TestCase {