diff --git a/CRM/Core/I18n.php b/CRM/Core/I18n.php
index 40107e9824c0..6dfbe23b566c 100644
--- a/CRM/Core/I18n.php
+++ b/CRM/Core/I18n.php
@@ -649,6 +649,9 @@ public function setLocale($locale) {
     global $dbLocale;
     $dbLocale = "_{$locale}";
 
+    // For self::getLocale()
+    global $tsLocale;
+    $tsLocale = $locale;
   }
 
   /**
diff --git a/tests/phpunit/CRM/Core/I18n/LocaleTest.php b/tests/phpunit/CRM/Core/I18n/LocaleTest.php
new file mode 100644
index 000000000000..cb1e88fb6f0c
--- /dev/null
+++ b/tests/phpunit/CRM/Core/I18n/LocaleTest.php
@@ -0,0 +1,55 @@
+<?php
+/*
+ +--------------------------------------------------------------------+
+ | CiviCRM version 5                                                  |
+ +--------------------------------------------------------------------+
+ | Copyright CiviCRM LLC (c) 2004-2018                                |
+ +--------------------------------------------------------------------+
+ | This file is a part of CiviCRM.                                    |
+ |                                                                    |
+ | CiviCRM is free software; you can copy, modify, and distribute it  |
+ | under the terms of the GNU Affero General Public License           |
+ | Version 3, 19 November 2007 and the CiviCRM Licensing Exception.   |
+ |                                                                    |
+ | CiviCRM is distributed in the hope that it will be useful, but     |
+ | WITHOUT ANY WARRANTY; without even the implied warranty of         |
+ | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.               |
+ | See the GNU Affero General Public License for more details.        |
+ |                                                                    |
+ | You should have received a copy of the GNU Affero General Public   |
+ | License and the CiviCRM Licensing Exception along                  |
+ | with this program; if not, contact CiviCRM LLC                     |
+ | at info[AT]civicrm[DOT]org. If you have questions about the        |
+ | GNU Affero General Public License or the licensing of CiviCRM,     |
+ | see the CiviCRM license FAQ at http://civicrm.org/licensing        |
+ +--------------------------------------------------------------------+
+ */
+/**
+ * Class CRM_Core_I18n_LocaleTest
+ * @group headless
+ */
+class CRM_Core_I18n_LocaleTest extends CiviUnitTestCase {
+
+  public function setUp() {
+    parent::setUp();
+  }
+
+  public function tearDown() {
+    CRM_Core_I18n_Schema::makeSinglelingual('en_US');
+    parent::tearDown();
+  }
+
+  /**
+   *
+   */
+  public function testI18nLocaleChange() {
+    $this->enableMultilingual();
+    CRM_Core_I18n_Schema::addLocale('fr_CA', 'en_US');
+
+    CRM_Core_I18n::singleton()->setLocale('fr_CA');
+    $locale = CRM_Core_I18n::getLocale();
+
+    $this->assertEquals($locale, 'fr_CA');
+  }
+
+}