diff -u b/core/modules/simpletest/simpletest.install b/core/modules/simpletest/simpletest.install
--- b/core/modules/simpletest/simpletest.install
+++ b/core/modules/simpletest/simpletest.install
@@ -24,7 +24,7 @@
 
   $requirements['deprecation'] = [
     'title' => t('Simpletest'),
-    'value' => t('The Drupal core Simpletest module is deprecated for removal in Drupal 9. It should not be enabled on production sites. See https://www.drupal.org/node/3091784 for alternatives.'),
+    'value' => t('The Drupal core <em>SimpleTest</em> (SimpleTest) module is deprecated for removal in Drupal 9. It should not be enabled on production sites. See https://www.drupal.org/node/3091784 for alternative ways to run tests during development.'),
     'severity' => $phase === 'runtime' ? REQUIREMENT_WARNING : REQUIREMENT_INFO,
   ];