core/lib/Drupal/Core/Test/FunctionalTestSetupTrait.php         | 5 ++---
 core/tests/Drupal/Tests/Listeners/DeprecationListenerTrait.php | 2 +-
 2 files changed, 3 insertions(+), 4 deletions(-)

diff --git a/core/lib/Drupal/Core/Test/FunctionalTestSetupTrait.php b/core/lib/Drupal/Core/Test/FunctionalTestSetupTrait.php
index 8ed2374c97..a144d6a11f 100644
--- a/core/lib/Drupal/Core/Test/FunctionalTestSetupTrait.php
+++ b/core/lib/Drupal/Core/Test/FunctionalTestSetupTrait.php
@@ -364,7 +364,7 @@ protected function initConfig(ContainerInterface $container) {
 
     if ($this->profile === 'testing') {
       if (empty($this->theme)) {
-        @trigger_error('Drupal\Tests\BrowserTestBase::$theme is required in drupal:9.0.0 when using the default "testing" install profile. See https://www.drupal.org/node/2352949, which includes recommendations on which theme to use', E_USER_DEPRECATED);
+        @trigger_error('Drupal\Tests\BrowserTestBase::$theme is required in drupal:9.0.0 when using the default "testing" install profile. See https://www.drupal.org/node/2352949, which includes recommendations on which theme to use.', E_USER_DEPRECATED);
         $this->theme = 'classy';
       }
       $config->getEditable('system.theme')
@@ -433,12 +433,11 @@ protected function installThemeFromClassProperty(ContainerInterface $container)
     try {
       $container->get('theme_installer')->install([$this->theme], TRUE);
     }
+    // The exception message has all the details.
     catch (UnknownExtensionException $e) {
-      // The exception message has all the details.
       $this->fail($e->getMessage());
     }
     catch (ExtensionNameLengthException $e) {
-      // The exception message has all the details.
       $this->fail($e->getMessage());
     }
   }
diff --git a/core/tests/Drupal/Tests/Listeners/DeprecationListenerTrait.php b/core/tests/Drupal/Tests/Listeners/DeprecationListenerTrait.php
index d4b7868675..08ee2f5898 100644
--- a/core/tests/Drupal/Tests/Listeners/DeprecationListenerTrait.php
+++ b/core/tests/Drupal/Tests/Listeners/DeprecationListenerTrait.php
@@ -141,7 +141,7 @@ public static function getSkippedDeprecations() {
       // 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 https://www.drupal.org/project/drupal/issues/3082655
-      'Drupal\Tests\BrowserTestBase::$theme is required in drupal:9.0.0 when using the default "testing" install profile. See https://www.drupal.org/node/2352949, which includes recommendations on which theme to use',
+      'Drupal\Tests\BrowserTestBase::$theme is required in drupal:9.0.0 when using the default "testing" install profile. See https://www.drupal.org/node/2352949, which includes recommendations on which theme to use.',
     ];
   }