reverted:
--- b/core/modules/system/lib/Drupal/system/Tests/Cache/DatabaseBackendUnitTestCase.php
+++ /dev/null
@@ -1,36 +0,0 @@
-<?php
-
-/**
- * @file
- * Definition of Drupal\system\Tests\Cache\DatabaseBackendUnitTestCase.
- */
-
-namespace Drupal\system\Tests\Cache;
-
-use Drupal\Core\Cache\DatabaseBackend;
-
-/**
- * Tests DatabaseBackend using GenericCacheBackendUnitTestBase.
- */
-class DatabaseBackendUnitTestCase extends GenericCacheBackendUnitTestBase {
-
-  public static function getInfo() {
-    return array(
-      'name' => 'Database backend',
-      'description' => 'Unit test of the database backend using the generic cache unit test case.',
-      'group' => 'Cache',
-    );
-  }
-
-  protected function createCacheBackend($bin) {
-    return new DatabaseBackend($bin);
-  }
-
-  public function setUpCacheBackend() {
-    drupal_install_schema('system');
-  }
-
-  public function tearDownCacheBackend() {
-    drupal_uninstall_schema('system');
-  }
-}
reverted:
--- b/core/modules/system/lib/Drupal/system/Tests/Cache/MemoryBackendUnitTestCase.php
+++ /dev/null
@@ -1,28 +0,0 @@
-<?php
-
-/**
- * @file
- * Definition of Drupal\system\Tests\Cache\ArrayBackendUnitTestCase.
- */
-
-namespace Drupal\system\Tests\Cache;
-
-use Drupal\Core\Cache\MemoryBackend;
-
-/**
- * Tests MemoryBackend using GenericCacheBackendUnitTestBase.
- */
-class MemoryBackendUnitTestCase extends GenericCacheBackendUnitTestBase {
-
-  public static function getInfo() {
-    return array(
-      'name' => 'Memory cache backend',
-      'description' => 'Unit test of the memory cache backend using the generic cache unit test case.',
-      'group' => 'Cache',
-    );
-  }
-
-  protected function createCacheBackend($bin) {
-    return new MemoryBackend($bin);
-  }
-}
only in patch2:
unchanged:
--- /dev/null
+++ b/core/modules/system/lib/Drupal/system/Tests/Cache/DatabaseBackendUnitTest.php
@@ -0,0 +1,36 @@
+<?php
+
+/**
+ * @file
+ * Definition of Drupal\system\Tests\Cache\DatabaseBackendUnitTest.
+ */
+
+namespace Drupal\system\Tests\Cache;
+
+use Drupal\Core\Cache\DatabaseBackend;
+
+/**
+ * Tests DatabaseBackend using GenericCacheBackendUnitTestBase.
+ */
+class DatabaseBackendUnitTest extends GenericCacheBackendUnitTestBase {
+
+  public static function getInfo() {
+    return array(
+      'name' => 'Database backend',
+      'description' => 'Unit test of the database backend using the generic cache unit test base.',
+      'group' => 'Cache',
+    );
+  }
+
+  protected function createCacheBackend($bin) {
+    return new DatabaseBackend($bin);
+  }
+
+  public function setUpCacheBackend() {
+    drupal_install_schema('system');
+  }
+
+  public function tearDownCacheBackend() {
+    drupal_uninstall_schema('system');
+  }
+}
only in patch2:
unchanged:
--- /dev/null
+++ b/core/modules/system/lib/Drupal/system/Tests/Cache/MemoryBackendUnitTest.php
@@ -0,0 +1,28 @@
+<?php
+
+/**
+ * @file
+ * Definition of Drupal\system\Tests\Cache\ArrayBackendUnitTest.
+ */
+
+namespace Drupal\system\Tests\Cache;
+
+use Drupal\Core\Cache\MemoryBackend;
+
+/**
+ * Tests MemoryBackend using GenericCacheBackendUnitTestBase.
+ */
+class MemoryBackendUnitTest extends GenericCacheBackendUnitTestBase {
+
+  public static function getInfo() {
+    return array(
+      'name' => 'Memory cache backend',
+      'description' => 'Unit test of the memory cache backend using the generic cache unit test base.',
+      'group' => 'Cache',
+    );
+  }
+
+  protected function createCacheBackend($bin) {
+    return new MemoryBackend($bin);
+  }
+}