diff --git a/core/modules/config/lib/Drupal/config/Tests/ConfigNamespaceTest.php b/core/modules/config/lib/Drupal/config/Tests/ConfigNamespaceTest.php
new file mode 100644
index 0000000..694b9e3
--- /dev/null
+++ b/core/modules/config/lib/Drupal/config/Tests/ConfigNamespaceTest.php
@@ -0,0 +1,55 @@
+<?php
+
+/**
+ * @file
+ * Definition of Drupal\config\Tests\ConfigNamespaceTest.
+ */
+
+namespace Drupal\config\Tests;
+
+use Drupal\Core\Config\DatabaseStorage;
+use Drupal\Core\Config\ConfigException;
+use Drupal\simpletest\WebTestBase;
+
+/**
+ * Tests saving config without namespace
+ */
+class ConfigNamespaceTest extends WebTestBase {
+  public static function getInfo() {
+    return array(
+      'name' => 'Namespace',
+      'description' => 'Test that an exception is thrown if namespace is missing in Config',
+      'group' => 'Configuration',
+    );
+  }
+
+  /**
+   * Tests CRUD operations.
+   */
+  function testNamespace() {
+    $name = 'nonamespace';
+    $caught_exception = FALSE;
+    try {
+      $config = config($name);
+      $config->save();
+    }
+    catch(ConfigException $e) {
+      if($e.getMessage() == "Missing namespace in Config name nonamespace") {
+        $caught_exception = TRUE;
+      }
+    }
+    $this->assertTrue($caught_exception,'No Namespace exception caught when namespace not specified in config name');
+    $name = 'config.namespace';
+    $caught_exception = FALSE;
+    try {
+      $config = config($name);
+      $config->save();
+    }
+    catch(ConfigException $e) {
+      if($e.getMessage() == "Missing namespace in Config name nonamespace") {
+        $caught_exception = TRUE;
+      }
+    }
+    $this->assertFalse($caught_exception,'No Namespace exception not caught when namespace exists in config name');
+  }
+}