diff -u b/core/modules/system/src/Tests/Module/InstallUninstallTest.php b/core/modules/system/src/Tests/Module/InstallUninstallTest.php
--- b/core/modules/system/src/Tests/Module/InstallUninstallTest.php
+++ b/core/modules/system/src/Tests/Module/InstallUninstallTest.php
@@ -63,7 +63,7 @@
     $package = $required_modules['help']->info['package'];
     $edit["modules[$package][help][enable]"] = TRUE;
     $this->drupalPostForm('admin/modules', $edit, t('Install'));
-    $this->assertText(t('The configuration options have been saved.'), 'Modules status has been updated.');
+    $this->assertText('has been enabled', 'Modules status has been updated.');
     $this->assertText(t('hook_modules_installed fired for help'));
     $this->assertModuleSuccessfullyInstalled('help');