diff --git a/apps/files_external/js/settings.js b/apps/files_external/js/settings.js
index 4e35ea531eb6fbf864132109b1ab68c2ff956aa4..112676b8c2722a6cca567adf8ab9e4211e2d262b 100644
--- a/apps/files_external/js/settings.js
+++ b/apps/files_external/js/settings.js
@@ -93,6 +93,7 @@ function addSelect2 ($elements, userListLimit) {
 		placeholder: t('files_external', 'All users. Type to select user or group.'),
 		allowClear: true,
 		multiple: true,
+		toggleSelect: true,
 		dropdownCssClass: 'files-external-select2',
 		//minimumInputLength: 1,
 		ajax: {
diff --git a/apps/systemtags/js/systemtagsfilelist.js b/apps/systemtags/js/systemtagsfilelist.js
index c2a6f09fd9e094bfdb608d018760b606f0ee1442..a40eb548d9f94eff7d8525e1afea6282efd0f6e3 100644
--- a/apps/systemtags/js/systemtagsfilelist.js
+++ b/apps/systemtags/js/systemtagsfilelist.js
@@ -88,6 +88,7 @@
 				placeholder: t('systemtags', 'Select tags to filter by'),
 				allowClear: false,
 				multiple: true,
+				toggleSelect: true,
 				separator: ',',
 				query: _.bind(this._queryTagsAutocomplete, this),
 
diff --git a/core/js/merged-template-prepend.json b/core/js/merged-template-prepend.json
index 0dd6bed53294f89a05c0df008f53c414fd876326..0de1da0bf62d3597be54552cdacafb15734ae0ed 100644
--- a/core/js/merged-template-prepend.json
+++ b/core/js/merged-template-prepend.json
@@ -12,6 +12,7 @@
   "mimetype.js",
   "mimetypelist.js",
   "oc-backbone.js",
+  "select2-toggleselect.js",
   "placeholder.js",
   "jquery.avatar.js",
   "jquery.contactsmenu.js"
diff --git a/settings/js/settings.js b/settings/js/settings.js
index 5a2ba4bcec7a447d36a1794ec7899fd7887d9cfd..3a1e67f41cdffa12d2f07a3fbeec5a747ba1e0f3 100644
--- a/settings/js/settings.js
+++ b/settings/js/settings.js
@@ -30,6 +30,7 @@ OC.Settings = _.extend(OC.Settings, {
 				placeholder: t('core', 'Groups'),
 				allowClear: true,
 				multiple: true,
+				toggleSelect: true,
 				separator: '|',
 				query: _.debounce(function(query) {
 					var queryData = {};
diff --git a/tests/acceptance/config/behat.yml b/tests/acceptance/config/behat.yml
index 15310e6883f7df3b58373a4c15a2a2b0b16f9356..f9412935e51940d87d1def032d5e52b07ea5c0a1 100644
--- a/tests/acceptance/config/behat.yml
+++ b/tests/acceptance/config/behat.yml
@@ -9,11 +9,13 @@ default:
         - ActorContext
         - NextcloudTestServerContext
 
+        - AppNavigationContext
         - FeatureContext
         - FilesAppContext
         - FilesSharingAppContext
         - LoginPageContext
         - NotificationContext
+        - SettingsContext
         - SettingsMenuContext
         - UsersSettingsContext
   extensions:
diff --git a/tests/acceptance/features/app-files.feature b/tests/acceptance/features/app-files.feature
index c968ae53ce421031ad8cca6435cbbd9d93292894..37e01bcada2ef54101633fe11da47293f2525479 100644
--- a/tests/acceptance/features/app-files.feature
+++ b/tests/acceptance/features/app-files.feature
@@ -69,6 +69,78 @@ Feature: app-files
     When I open the input field for tags in the details view
     Then I see that the input field for tags in the details view is shown
 
+  Scenario: create tags using the Administration settings
+    Given I am logged in as the admin
+    And I visit the settings page
+    And I open the "Workflow" section
+    # The "create" button does nothing before JavaScript was initialized, and
+    # the only way to detect that is waiting for the button to select tags to be
+    # shown.
+    And I see that the button to select tags is shown
+    When I create the tag "tag1" in the settings
+    Then I see that the dropdown for tags in the settings eventually contains the tag "tag1"
+
+  Scenario: add tags using the dropdown in the details view
+    Given I am logged in as the admin
+    And I visit the settings page
+    And I open the "Workflow" section
+    # The "create" button does nothing before JavaScript was initialized, and
+    # the only way to detect that is waiting for the button to select tags to be
+    # shown.
+    And I see that the button to select tags is shown
+    And I create the tag "tag1" in the settings
+    And I create the tag "tag2" in the settings
+    And I create the tag "tag3" in the settings
+    And I create the tag "tag4" in the settings
+    And I see that the dropdown for tags in the settings eventually contains the tag "tag1"
+    And I see that the dropdown for tags in the settings eventually contains the tag "tag2"
+    And I see that the dropdown for tags in the settings eventually contains the tag "tag3"
+    And I see that the dropdown for tags in the settings eventually contains the tag "tag4"
+    And I log out
+    And I am logged in
+    And I open the details view for "welcome.txt"
+    And I open the input field for tags in the details view
+    # When the input field is opened the dropdown is also opened automatically.
+    When I check the tag "tag2" in the dropdown for tags in the details view
+    And I check the tag "tag4" in the dropdown for tags in the details view
+    Then I see that the tag "tag2" in the dropdown for tags in the details view is checked
+    And I see that the tag "tag4" in the dropdown for tags in the details view is checked
+    And I see that the input field for tags in the details view contains the tag "tag2"
+    And I see that the input field for tags in the details view contains the tag "tag4"
+
+  Scenario: remove tags using the dropdown in the details view
+    Given I am logged in as the admin
+    And I visit the settings page
+    And I open the "Workflow" section
+    # The "create" button does nothing before JavaScript was initialized, and
+    # the only way to detect that is waiting for the button to select tags to be
+    # shown.
+    And I see that the button to select tags is shown
+    And I create the tag "tag1" in the settings
+    And I create the tag "tag2" in the settings
+    And I create the tag "tag3" in the settings
+    And I create the tag "tag4" in the settings
+    And I see that the dropdown for tags in the settings eventually contains the tag "tag1"
+    And I see that the dropdown for tags in the settings eventually contains the tag "tag2"
+    And I see that the dropdown for tags in the settings eventually contains the tag "tag3"
+    And I see that the dropdown for tags in the settings eventually contains the tag "tag4"
+    And I log out
+    And I am logged in
+    And I open the details view for "welcome.txt"
+    And I open the input field for tags in the details view
+    # When the input field is opened the dropdown is also opened automatically.
+    And I check the tag "tag2" in the dropdown for tags in the details view
+    And I check the tag "tag4" in the dropdown for tags in the details view
+    And I check the tag "tag3" in the dropdown for tags in the details view
+    When I uncheck the tag "tag2" in the dropdown for tags in the details view
+    And I uncheck the tag "tag4" in the dropdown for tags in the details view
+    Then I see that the tag "tag2" in the dropdown for tags in the details view is not checked
+    And I see that the tag "tag4" in the dropdown for tags in the details view is not checked
+    And I see that the tag "tag3" in the dropdown for tags in the details view is checked
+    And I see that the input field for tags in the details view does not contain the tag "tag2"
+    And I see that the input field for tags in the details view does not contain the tag "tag4"
+    And I see that the input field for tags in the details view contains the tag "tag3"
+
   Scenario: marking a file as favorite causes the file list to be sorted again
     Given I am logged in
     And I create a new folder named "A name alphabetically lower than welcome.txt"
diff --git a/tests/acceptance/features/bootstrap/AppNavigationContext.php b/tests/acceptance/features/bootstrap/AppNavigationContext.php
new file mode 100644
index 0000000000000000000000000000000000000000..9ef71a060650fb663380f7e075425c56d6b0ae34
--- /dev/null
+++ b/tests/acceptance/features/bootstrap/AppNavigationContext.php
@@ -0,0 +1,69 @@
+<?php
+
+/**
+ *
+ * @copyright Copyright (c) 2017, Daniel Calviño Sánchez (danxuliu@gmail.com)
+ *
+ * @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/>.
+ *
+ */
+
+use Behat\Behat\Context\Context;
+
+class AppNavigationContext implements Context, ActorAwareInterface {
+
+	use ActorAware;
+
+	/**
+	 * @return Locator
+	 */
+	public static function appNavigation() {
+		return Locator::forThe()->id("app-navigation")->
+				describedAs("App navigation");
+	}
+
+	/**
+	 * @return Locator
+	 */
+	public static function appNavigationSectionItemFor($sectionText) {
+		return Locator::forThe()->xpath("//li[normalize-space() = '$sectionText']")->
+				descendantOf(self::appNavigation())->
+				describedAs($sectionText . " section item in App Navigation");
+	}
+
+	/**
+	 * @return Locator
+	 */
+	public static function appNavigationCurrentSectionItem() {
+		return Locator::forThe()->css(".active")->descendantOf(self::appNavigation())->
+				describedAs("Current section item in App Navigation");
+	}
+
+	/**
+	 * @Given I open the :section section
+	 */
+	public function iOpenTheSection($section) {
+		$this->actor->find(self::appNavigationSectionItemFor($section), 10)->click();
+	}
+
+	/**
+	 * @Then I see that the current section is :section
+	 */
+	public function iSeeThatTheCurrentSectionIs($section) {
+		PHPUnit_Framework_Assert::assertEquals($this->actor->find(self::appNavigationCurrentSectionItem(), 10)->getText(), $section);
+	}
+
+}
diff --git a/tests/acceptance/features/bootstrap/FilesAppContext.php b/tests/acceptance/features/bootstrap/FilesAppContext.php
index 631eb60393d4d223f9dc14163213ba48c98556ee..bb088c0a2c33e51e8267a39e86a65106b75174e6 100644
--- a/tests/acceptance/features/bootstrap/FilesAppContext.php
+++ b/tests/acceptance/features/bootstrap/FilesAppContext.php
@@ -41,31 +41,6 @@ class FilesAppContext implements Context, ActorAwareInterface {
 				 "Deleted files" => "trashbin" ];
 	}
 
-	/**
-	 * @return Locator
-	 */
-	public static function appNavigation() {
-		return Locator::forThe()->id("app-navigation")->
-				describedAs("App navigation");
-	}
-
-	/**
-	 * @return Locator
-	 */
-	public static function appNavigationSectionItemFor($sectionText) {
-		return Locator::forThe()->xpath("//li[normalize-space() = '$sectionText']")->
-				descendantOf(self::appNavigation())->
-				describedAs($sectionText . " section item in App Navigation");
-	}
-
-	/**
-	 * @return Locator
-	 */
-	public static function appNavigationCurrentSectionItem() {
-		return Locator::forThe()->css(".active")->descendantOf(self::appNavigation())->
-				describedAs("Current section item in App Navigation");
-	}
-
 	/**
 	 * @return Locator
 	 */
@@ -123,12 +98,47 @@ class FilesAppContext implements Context, ActorAwareInterface {
 	/**
 	 * @return Locator
 	 */
-	public static function inputFieldForTagsInCurrentSectionDetails() {
+	public static function inputFieldForTagsInCurrentSectionDetailsView() {
 		return Locator::forThe()->css(".systemTagsInfoView")->
 				descendantOf(self::currentSectionDetailsView())->
 				describedAs("Input field for tags in current section details view in Files app");
 	}
 
+	/**
+	 * @return Locator
+	 */
+	public static function itemInInputFieldForTagsInCurrentSectionDetailsViewForTag($tag) {
+		return Locator::forThe()->xpath("//span[normalize-space() = '$tag']")->
+				descendantOf(self::inputFieldForTagsInCurrentSectionDetailsView())->
+				describedAs("Item in input field for tags in current section details view for tag $tag in Files app");
+	}
+
+	/**
+	 * @return Locator
+	 */
+	public static function itemInDropdownForTag($tag) {
+		return Locator::forThe()->xpath("//*[contains(concat(' ', normalize-space(@class), ' '), ' select2-result-label ')]//span[normalize-space() = '$tag']/ancestor::li")->
+				descendantOf(self::select2Dropdown())->
+				describedAs("Item in dropdown for tag $tag in Files app");
+	}
+
+	/**
+	 * @return Locator
+	 */
+	public static function checkmarkInItemInDropdownForTag($tag) {
+		return Locator::forThe()->css(".checkmark")->
+				descendantOf(self::itemInDropdownForTag($tag))->
+				describedAs("Checkmark in item in dropdown for tag $tag in Files app");
+	}
+
+	/**
+	 * @return Locator
+	 */
+	private static function select2Dropdown() {
+		return Locator::forThe()->css("#select2-drop")->
+				describedAs("Select2 dropdown in Files app");
+	}
+
 	/**
 	 * @return Locator
 	 */
@@ -354,13 +364,6 @@ class FilesAppContext implements Context, ActorAwareInterface {
 		$this->actor->find(self::createNewFolderMenuItemNameInput(), 2)->setValue($folderName . "\r");
 	}
 
-	/**
-	 * @Given I open the :section section
-	 */
-	public function iOpenTheSection($section) {
-		$this->actor->find(self::appNavigationSectionItemFor($section), 10)->click();
-	}
-
 	/**
 	 * @Given I open the details view for :fileName
 	 */
@@ -427,6 +430,24 @@ class FilesAppContext implements Context, ActorAwareInterface {
 		$this->actor->find(self::viewFileInFolderMenuItem(), 2)->click();
 	}
 
+	/**
+	 * @When I check the tag :tag in the dropdown for tags in the details view
+	 */
+	public function iCheckTheTagInTheDropdownForTagsInTheDetailsView($tag) {
+		$this->iSeeThatTheTagInTheDropdownForTagsInTheDetailsViewIsNotChecked($tag);
+
+		$this->actor->find(self::itemInDropdownForTag($tag), 10)->click();
+	}
+
+	/**
+	 * @When I uncheck the tag :tag in the dropdown for tags in the details view
+	 */
+	public function iUncheckTheTagInTheDropdownForTagsInTheDetailsView($tag) {
+		$this->iSeeThatTheTagInTheDropdownForTagsInTheDetailsViewIsChecked($tag);
+
+		$this->actor->find(self::itemInDropdownForTag($tag), 10)->click();
+	}
+
 	/**
 	 * @When I protect the shared link with the password :password
 	 */
@@ -445,13 +466,6 @@ class FilesAppContext implements Context, ActorAwareInterface {
 				$this->actor->getSession()->getCurrentUrl());
 	}
 
-	/**
-	 * @Then I see that the current section is :section
-	 */
-	public function iSeeThatTheCurrentSectionIs($section) {
-		PHPUnit_Framework_Assert::assertEquals($this->actor->find(self::appNavigationCurrentSectionItem(), 10)->getText(), $section);
-	}
-
 	/**
 	 * @Then I see that the details view for :section section is open
 	 */
@@ -511,7 +525,47 @@ class FilesAppContext implements Context, ActorAwareInterface {
 	 */
 	public function iSeeThatTheInputFieldForTagsInTheDetailsViewIsShown() {
 		PHPUnit_Framework_Assert::assertTrue(
-				$this->actor->find(self::inputFieldForTagsInCurrentSectionDetails(), 10)->isVisible());
+				$this->actor->find(self::inputFieldForTagsInCurrentSectionDetailsView(), 10)->isVisible());
+	}
+
+	/**
+	 * @Then I see that the input field for tags in the details view contains the tag :tag
+	 */
+	public function iSeeThatTheInputFieldForTagsInTheDetailsViewContainsTheTag($tag) {
+		PHPUnit_Framework_Assert::assertTrue(
+				$this->actor->find(self::itemInInputFieldForTagsInCurrentSectionDetailsViewForTag($tag), 10)->isVisible());
+	}
+
+	/**
+	 * @Then I see that the input field for tags in the details view does not contain the tag :tag
+	 */
+	public function iSeeThatTheInputFieldForTagsInTheDetailsViewDoesNotContainTheTag($tag) {
+		$this->iSeeThatTheInputFieldForTagsInTheDetailsViewIsShown();
+
+		try {
+			PHPUnit_Framework_Assert::assertFalse(
+					$this->actor->find(self::itemInInputFieldForTagsInCurrentSectionDetailsViewForTag($tag))->isVisible());
+		} catch (NoSuchElementException $exception) {
+		}
+	}
+
+	/**
+	 * @Then I see that the tag :tag in the dropdown for tags in the details view is checked
+	 */
+	public function iSeeThatTheTagInTheDropdownForTagsInTheDetailsViewIsChecked($tag) {
+		PHPUnit_Framework_Assert::assertTrue(
+				$this->actor->find(self::checkmarkInItemInDropdownForTag($tag), 10)->isVisible());
+	}
+
+	/**
+	 * @Then I see that the tag :tag in the dropdown for tags in the details view is not checked
+	 */
+	public function iSeeThatTheTagInTheDropdownForTagsInTheDetailsViewIsNotChecked($tag) {
+		PHPUnit_Framework_Assert::assertTrue(
+				$this->actor->find(self::itemInDropdownForTag($tag), 10)->isVisible());
+
+		PHPUnit_Framework_Assert::assertFalse(
+				$this->actor->find(self::checkmarkInItemInDropdownForTag($tag))->isVisible());
 	}
 
 	/**
diff --git a/tests/acceptance/features/bootstrap/SettingsContext.php b/tests/acceptance/features/bootstrap/SettingsContext.php
new file mode 100644
index 0000000000000000000000000000000000000000..edbb6a94d1529538698660493350ee0a8900957c
--- /dev/null
+++ b/tests/acceptance/features/bootstrap/SettingsContext.php
@@ -0,0 +1,152 @@
+<?php
+
+/**
+ *
+ * @copyright Copyright (c) 2017, Daniel Calviño Sánchez (danxuliu@gmail.com)
+ *
+ * @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/>.
+ *
+ */
+
+use Behat\Behat\Context\Context;
+
+class SettingsContext implements Context, ActorAwareInterface {
+
+	use ActorAware;
+
+	/**
+	 * @return Locator
+	 */
+	public static function systemTagsSelectTagButton() {
+		return Locator::forThe()->id("s2id_systemtag")->
+				describedAs("Select tag button in system tags section in Administration Settings");
+	}
+
+	/**
+	 * @return Locator
+	 */
+	public static function systemTagsItemInDropdownForTag($tag) {
+		return Locator::forThe()->xpath("//*[contains(concat(' ', normalize-space(@class), ' '), ' select2-result-label ')]//span[normalize-space() = '$tag']/ancestor::li")->
+				descendantOf(self::select2Dropdown())->
+				describedAs("Item in dropdown for tag $tag in system tags section in Administration Settings");
+	}
+
+	/**
+	 * @return Locator
+	 */
+	private static function select2Dropdown() {
+		return Locator::forThe()->css("#select2-drop")->
+				describedAs("Select2 dropdown in Settings");
+	}
+
+	/**
+	 * @return Locator
+	 */
+	private static function select2DropdownMask() {
+		return Locator::forThe()->css("#select2-drop-mask")->
+				describedAs("Select2 dropdown mask in Settings");
+	}
+
+	/**
+	 * @return Locator
+	 */
+	public static function systemTagsTagNameInput() {
+		return Locator::forThe()->id("systemtag_name")->
+				describedAs("Tag name input in system tags section in Administration Settings");
+	}
+
+	/**
+	 * @return Locator
+	 */
+	public static function systemTagsCreateOrUpdateButton() {
+		return Locator::forThe()->id("systemtag_submit")->
+				describedAs("Create/Update button in system tags section in Administration Settings");
+	}
+
+	/**
+	 * @return Locator
+	 */
+	public static function systemTagsResetButton() {
+		return Locator::forThe()->id("systemtag_reset")->
+				describedAs("Reset button in system tags section in Administration Settings");
+	}
+
+	/**
+	 * @When I create the tag :tag in the settings
+	 */
+	public function iCreateTheTagInTheSettings($tag) {
+		$this->actor->find(self::systemTagsResetButton(), 10)->click();
+		$this->actor->find(self::systemTagsTagNameInput())->setValue($tag);
+		$this->actor->find(self::systemTagsCreateOrUpdateButton())->click();
+	}
+
+	/**
+	 * @Then I see that the button to select tags is shown
+	 */
+	public function iSeeThatTheButtonToSelectTagsIsShown() {
+		PHPUnit_Framework_Assert::assertTrue($this->actor->find(self::systemTagsSelectTagButton(), 10)->isVisible());
+	}
+
+	/**
+	 * @Then I see that the dropdown for tags in the settings eventually contains the tag :tag
+	 */
+	public function iSeeThatTheDropdownForTagsInTheSettingsEventuallyContainsTheTag($tag) {
+		// When the dropdown is opened it is not automatically updated if new
+		// tags are added to the server, and when a tag is created, no explicit
+		// feedback is provided to the user about the completion of that
+		// operation (that is, when the tag is added to the server). Therefore,
+		// to verify that creating a tag does in fact add it to the server it is
+		// necessary to repeatedly open the dropdown until the tag is shown in
+		// the dropdown (or the limit of tries is reached).
+
+		PHPUnit_Framework_Assert::assertTrue($this->actor->find(self::systemTagsSelectTagButton(), 10)->isVisible());
+
+		$actor = $this->actor;
+
+		$tagFoundInDropdownCallback = function() use($actor, $tag) {
+			// Open the dropdown to look for the tag.
+			$actor->find(self::systemTagsSelectTagButton())->click();
+
+			// When the dropdown is opened it is initially empty, and its
+			// contents are updated once received from the server. Therefore, a
+			// timeout must be used when looking for the tags.
+			try {
+				$tagFound = $this->actor->find(self::systemTagsItemInDropdownForTag($tag), 10)->isVisible();
+			} catch (NoSuchElementException $exception) {
+				$tagFound = false;
+			}
+
+			// Close again the dropdown after looking for the tag. When a
+			// dropdown is opened Select2 creates a special element that masks
+			// every other element but the dropdown to get all mouse clicks;
+			// this is used by Select2 to close the dropdown when the user
+			// clicks outside it.
+			$actor->find(self::select2DropdownMask())->click();
+
+			return $tagFound;
+		};
+
+		$numberOfTries = 5;
+		for ($i = 0; $i < $numberOfTries; $i++) {
+			if ($tagFoundInDropdownCallback()) {
+				return;
+			}
+		}
+
+		PHPUnit_Framework_Assert::fail("The dropdown in system tags section in Administration Settings does not contain the tag $tag after $numberOfTries tries");
+	}
+
+}