diff --git a/e107_tests/tests/unit/e107/Shims/Internal/e_dateAlternateTest.php b/e107_tests/tests/unit/e107/Shims/Internal/e_dateAlternateTest.php
new file mode 100644
index 000000000..06618bfdd
--- /dev/null
+++ b/e107_tests/tests/unit/e107/Shims/Internal/e_dateAlternateTest.php
@@ -0,0 +1,93 @@
+<?php
+/**
+ * e107 website system
+ *
+ * Copyright (C) 2008-2021 e107 Inc (e107.org)
+ * Released under the terms and conditions of the
+ * GNU General Public License (http://www.gnu.org/licenses/gpl.txt)
+ *
+ */
+
+namespace e107\Shims\Internal;
+
+/**
+ * @param string $extension
+ * @return bool
+ */
+function extension_loaded($extension)
+{
+	if (e_dateAlternateTest::$alternate_formatter) return false;
+
+	return \extension_loaded($extension);
+}
+
+/**
+ * @param string $constant_name
+ * @return bool
+ */
+function defined($constant_name)
+{
+	if (e_dateAlternateTest::$alternate_locale) return false;
+
+	return \defined($constant_name);
+}
+
+/**
+ * @param int              $category
+ * @param array|string|int $locales
+ * @param string           ...$rest
+ * @return false|string
+ */
+function setlocale($category, $locales, ...$rest)
+{
+	if (e_dateAlternateTest::$alternate_locale) return 'nl_NL';
+
+	return \setlocale($category, $locales, ...$rest);
+}
+
+
+class e_dateAlternateTest extends \e_dateTest
+{
+	/**
+	 * @var bool
+	 */
+	public static $alternate_formatter;
+	/**
+	 * @var bool
+	 */
+	public static $alternate_locale;
+
+	public function _before()
+	{
+		self::$alternate_formatter = true;
+		parent::_before();
+	}
+
+	public function _after()
+	{
+		parent::_after();
+		self::$alternate_formatter = false;
+	}
+
+	public function testConvert_dateDutch()
+	{
+		self::$alternate_formatter = false;
+		self::$alternate_locale = true;
+
+		try
+		{
+
+			$actual = $this->dateObj->convert_date(mktime(12, 45, 03, 2, 5, 2018), 'long');
+			$expected = 'maandag 05 februari 2018 - 12:45:03';
+			$this->assertEquals($expected, $actual);
+
+			$actual = $this->dateObj->convert_date(mktime(12, 45, 03, 2, 5, 2018), 'inputtime');
+			$expected = '12:45 P.M.';
+			$this->assertEquals($expected, $actual);
+		}
+		finally
+		{
+			self::$alternate_locale = false;
+		}
+	}
+}