diff --git a/lib/form/tests/behat/filetypes.feature b/lib/form/tests/behat/filetypes.feature
new file mode 100644
index 00000000000..b65ca66bff8
--- /dev/null
+++ b/lib/form/tests/behat/filetypes.feature
@@ -0,0 +1,27 @@
+@core_form
+Feature: There is a form element allowing to select filetypes
+  In order to test the filetypes field
+  As an admin
+  I need a test form that makes use of the filetypes field
+
+  Background:
+    Given the following "courses" exist:
+      | fullname | shortname | format |
+      | Course 1 | C1        | topics |
+    And the following "activities" exist:
+      | activity   | name | intro                                                              | course | idnumber |
+      | label      | L1   | <a href="../lib/form/tests/fixtures/filetypes.php">FixtureLink</a> | C1     | label1   |
+    And I log in as "admin"
+    And I am on "Course 1" course homepage
+    And I follow "FixtureLink"
+
+  Scenario: File types can be provided via direct input with JavaScript disabled
+    Given I set the field "Choose from all file types" to ".png .gif .jpg"
+    When I press "Save changes"
+    Then the field "Choose from all file types" matches value ".png .gif .jpg"
+
+  @javascript
+  Scenario: File types can be provided via direct input with JavaScript enabled
+    Given I set the field "Choose from all file types" to ".png .gif .jpg"
+    When I press "Save changes"
+    Then the field "Choose from all file types" matches value ".png .gif .jpg"
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diff --git a/lib/form/tests/fixtures/filetypes.php b/lib/form/tests/fixtures/filetypes.php
new file mode 100644
index 00000000000..331fbfa7fe8
--- /dev/null
+++ b/lib/form/tests/fixtures/filetypes.php
@@ -0,0 +1,74 @@
+<?php
+// This file is part of Moodle - http://moodle.org/
+//
+// Moodle is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// Moodle 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 General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
+
+/**
+ * Fixture script for Behat test for testing the filetypes element.
+ *
+ * @package     core_form
+ * @category    test
+ * @copyright   2017 David Mudrák <david@moodle.com>
+ * @license     http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+
+// No login check is expected here as this is for Behat tests only.
+// @codingStandardsIgnoreLine
+require(__DIR__.'/../../../../config.php');
+require_once($CFG->libdir.'/formslib.php');
+
+// Behat test fixture only.
+defined('BEHAT_SITE_RUNNING') || die('Only available on Behat test server');
+
+/**
+ * Defines a test form to be used in automatic tests.
+ *
+ * @copyright 2017 David Mudrak <david@moodle.com>
+ * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+class test_form extends moodleform {
+
+    /**
+     * Defines the form fields.
+     */
+    public function definition() {
+        $mform = $this->_form;
+
+        $mform->addElement('filetypes', 'filetypes0', 'Choose from all file types');
+        $mform->setDefault('filetypes0', '.pdf');
+
+        $mform->addElement('filetypes', 'filetypes1', 'Choose from a limited set',
+            ['onlytypes' => array('.pdf', 'web_image', 'image')]);
+
+        $mform->addElement('filetypes', 'filetypes2', 'Choose without "all"',
+            ['allowall' => false]);
+
+        $mform->addElement('filetypes', 'filetypes3', 'Unknown file types are allowed here',
+            ['allowunknown' => true]);
+
+        $this->add_action_buttons(false);
+    }
+}
+
+$PAGE->set_context(context_system::instance());
+$PAGE->set_url('/lib/form/tests/fixtures/filetypes.php');
+$PAGE->set_title('Filetypes element test page');
+
+$form = new test_form($PAGE->url);
+$formdata = $form->get_data();
+
+echo $OUTPUT->header();
+echo $OUTPUT->heading($PAGE->title);
+$form->display();
+echo $OUTPUT->footer();
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