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diff --git a/tests/lib/Authentication/TwoFactorAuth/MandatoryTwoFactorTest.php b/tests/lib/Authentication/TwoFactorAuth/MandatoryTwoFactorTest.php
new file mode 100644
index 00000000000..1cacbd5f787
--- /dev/null
+++ b/tests/lib/Authentication/TwoFactorAuth/MandatoryTwoFactorTest.php
@@ -0,0 +1,88 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * @copyright 2018 Christoph Wurst <christoph@winzerhof-wurst.at>
+ *
+ * @author 2018 Christoph Wurst <christoph@winzerhof-wurst.at>
+ *
+ * @license GNU AGPL version 3 or any later version
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program 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
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+namespace Tests\Authentication\TwoFactorAuth;
+
+use OC\Authentication\TwoFactorAuth\MandatoryTwoFactor;
+use OCP\IConfig;
+use PHPUnit\Framework\MockObject\MockObject;
+use Test\TestCase;
+
+class MandatoryTwoFactorTest extends TestCase {
+
+	/** @var IConfig|MockObject */
+	private $config;
+
+	/** @var MandatoryTwoFactor */
+	private $mandatoryTwoFactor;
+
+	protected function setUp() {
+		parent::setUp();
+
+		$this->config = $this->createMock(IConfig::class);
+
+		$this->mandatoryTwoFactor = new MandatoryTwoFactor($this->config);
+	}
+
+	public function testIsNotEnforced() {
+		$this->config->expects($this->once())
+			->method('getSystemValue')
+			->with('twofactor_enforced', 'false')
+			->willReturn('false');
+
+		$isEnforced = $this->mandatoryTwoFactor->isEnforced();
+
+		$this->assertFalse($isEnforced);
+	}
+
+	public function testIsEnforced() {
+		$this->config->expects($this->once())
+			->method('getSystemValue')
+			->with('twofactor_enforced', 'false')
+			->willReturn('true');
+
+		$isEnforced = $this->mandatoryTwoFactor->isEnforced();
+
+		$this->assertTrue($isEnforced);
+	}
+
+	public function testSetEnforced() {
+		$this->config->expects($this->once())
+			->method('setSystemValue')
+			->with('twofactor_enforced', 'true');
+
+		$this->mandatoryTwoFactor->setEnforced(true);
+	}
+
+	public function testSetNotEnforced() {
+		$this->config->expects($this->once())
+			->method('setSystemValue')
+			->with('twofactor_enforced', 'false');
+
+		$this->mandatoryTwoFactor->setEnforced(false);
+	}
+
+}