diff --git a/core/modules/simpletest/lib/Drupal/simpletest/TestBase.php b/core/modules/simpletest/lib/Drupal/simpletest/TestBase.php
index 067030b..92fdaf6 100644
--- a/core/modules/simpletest/lib/Drupal/simpletest/TestBase.php
+++ b/core/modules/simpletest/lib/Drupal/simpletest/TestBase.php
@@ -806,6 +806,9 @@ public function run(array $methods = array()) {
     $test_methods = array_filter(get_class_methods($class), function ($method) {
       return strpos($method, 'test') === 0;
     });
+    if (empty($test_methods)) {
+      $this->assert(FALSE, 'No test methods found.', 'Requirements', array('function' => __METHOD__ . '()', 'file' => __FILE__, 'line' => __LINE__));
+    }
     if ($methods) {
       $test_methods = array_intersect($test_methods, $methods);
     }
diff --git a/core/modules/system/lib/Drupal/system/Tests/Installer/InstallerTranslationTest.php b/core/modules/system/lib/Drupal/system/Tests/Installer/InstallerTranslationTest.php
index 691d293..269a846 100644
--- a/core/modules/system/lib/Drupal/system/Tests/Installer/InstallerTranslationTest.php
+++ b/core/modules/system/lib/Drupal/system/Tests/Installer/InstallerTranslationTest.php
@@ -59,4 +59,12 @@ protected function setUpConfirm() {
     parent::setUpConfirm();
   }
 
+  /**
+   * Verifies that installation succeeded.
+   */
+  public function testInstaller() {
+    $this->assertUrl('user/1');
+    $this->assertResponse(200);
+  }
+
 }