diff --git a/core/modules/system/lib/Drupal/system/Tests/Database/SelectCloneTest.php b/core/modules/system/lib/Drupal/system/Tests/Database/SelectCloneTest.php
new file mode 100644
index 0000000..550cab7
--- /dev/null
+++ b/core/modules/system/lib/Drupal/system/Tests/Database/SelectCloneTest.php
@@ -0,0 +1,45 @@
+<?php
+
+/**
+ * @file
+ * Definition of Drupal\system\Tests\Database\SelectCloneTest.
+ */
+
+namespace Drupal\system\Tests\Database;
+
+/**
+ * Test cloning Select queries.
+ */
+class SelectCloneTest extends DatabaseTestBase {
+
+  public static function getInfo() {
+    return array(
+      'name' => 'Select tests, cloning',
+      'description' => 'Test cloning Select queries.',
+      'group' => 'Database',
+    );
+  }
+
+  /**
+   * Test that subqueries as value within conditions are cloned properly.
+   */
+  function testSelectConditionSubQueryCloning() {
+    $subquery = db_select('test', 't');
+    $subquery->addField('t', 'id', 'id');
+    $subquery->condition('age', 28, '<');
+
+    $query = db_select('test', 't');
+    $query->addField('t', 'name', 'name');
+    $query->condition('id', $subquery, 'IN');
+
+    $clone = clone $query;
+    $subquery->condition('age', 25, '>');
+
+    $result = $clone->execute();
+    $num_records = 0;
+    foreach ($result as $record) {
+      $num_records++;
+    }
+    $this->assertEqual(3, $num_records, 'The cloned query returns the expected number of rows');
+  }
+}