Update to Drupal 8.1.5. For more information, see https://www.drupal.org/project/drupal/releases/8.1.5

core/tests/TestSuites/KernelTestSuite.php

@@ -0,0 +1,27 @@
+<?php
+
+namespace Drupal\Tests\TestSuites;
+
+require_once __DIR__ . '/TestSuiteBase.php';
+
+/**
+ * Discovers tests for the kernel test suite.
+ */
+class KernelTestSuite extends TestSuiteBase {
+
+  /**
+   * Factory method which loads up a suite with all kernel tests.
+   *
+   * @return static
+   *   The test suite.
+   */
+  public static function suite() {
+    $root = dirname(dirname(dirname(__DIR__)));
+
+    $suite = new static('kernel');
+    $suite->addTestsBySuiteNamespace($root, 'Kernel');
+
+    return $suite;
+  }
+
+}