diff --git a/tests/ExceptionMBStringTest.php b/tests/ExceptionMBStringTest.php
new file mode 100644
index 0000000..4c92548
--- /dev/null
+++ b/tests/ExceptionMBStringTest.php
@@ -0,0 +1,23 @@
+<?php
+namespace vipnytt\UserAgentParser\Tests;
+
+use vipnytt\UserAgentParser;
+
+/**
+ * Class ExceptionMBStringTest
+ *
+ * @package vipnytt\UserAgentParser\Tests
+ */
+class ExceptionMBStringTest extends \PHPUnit_Framework_TestCase
+{
+    /**
+     * Test if exception is thrown when extension `mbstring` is not loaded
+     */
+    public function testExceptionMBString()
+    {
+        if (!extension_loaded('mbstring')) {
+            $this->expectException('\Exception');
+            new UserAgentParser('SitemapParser');
+        }
+    }
+}
diff --git a/tests/VersionTest.php b/tests/VersionTest.php
index 2a58a32..32fac96 100644
--- a/tests/VersionTest.php
+++ b/tests/VersionTest.php
@@ -37,6 +37,10 @@ function generateDataForTest()
             [
                 'bingbot/2.0',
                 'bingbot',
+            ],
+            [
+                'mybot',
+                'mybot',
             ]
         ];
     }