diff --git a/admin/code/LeftAndMain.php b/admin/code/LeftAndMain.php
index 750153883..25189dbc0 100644
--- a/admin/code/LeftAndMain.php
+++ b/admin/code/LeftAndMain.php
@@ -378,29 +378,58 @@ class LeftAndMain extends Controller implements PermissionProvider {
 		$ie = isset($_SERVER['HTTP_USER_AGENT']) ? strpos($_SERVER['HTTP_USER_AGENT'], 'MSIE') : false;
 		if($ie) {
 			$version = substr($_SERVER['HTTP_USER_AGENT'], $ie + 5, 3);
-			if($version == 7) Requirements::css(FRAMEWORK_ADMIN_DIR . '/css/ie7.css');
-			else if($version == 8) Requirements::css(FRAMEWORK_ADMIN_DIR . '/css/ie8.css');
+
+			if($version == 7) {
+				Requirements::css(FRAMEWORK_ADMIN_DIR . '/css/ie7.css');
+			} else if($version == 8) {
+				Requirements::css(FRAMEWORK_ADMIN_DIR . '/css/ie8.css');
+			}
 		}
 
 		// Custom requirements
 		$extraJs = $this->stat('extra_requirements_javascript');
 
-		if($extraJs) foreach($extraJs as $file => $config) {
-			Requirements::javascript($file);
+		if($extraJs) {
+			foreach($extraJs as $file => $config) {
+				if(is_numeric($file)) {
+					$file = $config;
+				}
+				
+				Requirements::javascript($file);
+			}
 		}
+
 		$extraCss = $this->stat('extra_requirements_css');
-		if($extraCss) foreach($extraCss as $file => $config) {
-			Requirements::css($file, isset($config['media']) ? $config['media'] : null);
+		
+		if($extraCss) {
+			foreach($extraCss as $file => $config) {
+				if(is_numeric($file)) {
+					$file = $config;
+					$config = array();
+				}
+				
+				Requirements::css($file, isset($config['media']) ? $config['media'] : null);
+			}
 		}
+
 		$extraThemedCss = $this->stat('extra_requirements_themedCss');
-		if($extraThemedCss) foreach ($extraThemedCss as $file => $config) {
-			Requirements::themedCSS($file, isset($config['media']) ? $config['media'] : null);
+
+		if($extraThemedCss) {
+			foreach ($extraThemedCss as $file => $config) {
+				if(is_numeric($file)) {
+					$file = $config;
+					$config = array();
+				}
+
+				Requirements::themedCSS($file, isset($config['media']) ? $config['media'] : null);
+			}
 		}
 
 		$dummy = null;
 		$this->extend('init', $dummy);
 
-		// The user's theme shouldn't affect the CMS, if, for example, they have replaced TableListField.ss or Form.ss.
+		// The user's theme shouldn't affect the CMS, if, for example, they have 
+		// replaced TableListField.ss or Form.ss.
 		Config::inst()->update('SSViewer', 'theme_enabled', false);
 	}
 	
diff --git a/admin/tests/LeftAndMainTest.php b/admin/tests/LeftAndMainTest.php
index 2b971a335..23ae15fb9 100644
--- a/admin/tests/LeftAndMainTest.php
+++ b/admin/tests/LeftAndMainTest.php
@@ -1,6 +1,7 @@
 <?php
+
 /**
- * @package cms
+ * @package framework
  * @subpackage tests
  */
 class LeftAndMainTest extends FunctionalTest {
@@ -9,14 +10,49 @@ class LeftAndMainTest extends FunctionalTest {
 	
 	protected $extraDataObjects = array('LeftAndMainTest_Object');
 	
+	protected $backupCss, $backupJs, $backupCombined;
+
 	public function setUp() {
 		parent::setUp();
 		
 		// @todo fix controller stack problems and re-activate
 		//$this->autoFollowRedirection = false;
 		CMSMenu::populate_menu();
+
+		$this->backupCss = Config::inst()->get('LeftAndMain', 'extra_requirements_css');
+		$this->backupJs = Config::inst()->get('LeftAndMain', 'extra_requirements_javascript');
+		$this->backupCombined = Requirements::get_combined_files_enabled();
+
+		Config::inst()->update('LeftAndMain', 'extra_requirements_css', array(
+			FRAMEWORK_DIR . '/tests/assets/LeftAndMainTest.css'
+		));
+
+		Config::inst()->update('LeftAndMain', 'extra_requirements_javascript', array(
+			FRAMEWORK_DIR . '/tests/assets/LeftAndMainTest.js'
+		));
+
+		Requirements::set_combined_files_enabled(false);
+	}
+
+	public function tearDown() {
+		parent::tearDown();
+
+		Config::inst()->update('LeftAndMain', 'extra_requirements_css', $this->backupCss);
+		Config::inst()->update('LeftAndMain', 'extra_requirements_javascript', $this->backupJs);
+
+		Requirements::set_combined_files_enabled($this->backupCombined);
 	}
 	
+
+	public function testExtraCssAndJavascript() {
+		$admin = $this->objFromFixture('Member', 'admin');
+		$this->session()->inst_set('loggedInAs', $admin->ID);
+		$response = $this->get('LeftAndMainTest_Controller');
+
+		$this->assertRegExp('/tests\/assets\/LeftAndMainTest.css/i', $response->getBody(), "body should contain custom css");
+		$this->assertRegExp('/tests\/assets\/LeftAndMainTest.js/i', $response->getBody(), "body should contain custom js");
+	}
+
 	/**
 	 * Note: This test would typically rely on SiteTree and CMSMain, but is mocked by
 	 * LeftAndMain_Controller and LeftAndMain_Object here to remove this dependency.
@@ -158,15 +194,22 @@ class LeftAndMainTest extends FunctionalTest {
 		
 		$this->session()->inst_set('loggedInAs', null);
 	}
-	
 }
 
+/**
+ * @package framework
+ * @subpackage tests
+ */
 class LeftAndMainTest_Controller extends LeftAndMain implements TestOnly {
 	protected $template = 'BlankPage';
 	
 	private static $tree_class = 'LeftAndMainTest_Object';
 }
 
+/**
+ * @package framework
+ * @subpackage tests
+ */
 class LeftAndMainTest_Object extends DataObject implements TestOnly {
 	
 	private static $db = array(
diff --git a/docs/en/howto/extend-cms-interface.md b/docs/en/howto/extend-cms-interface.md
index 5460583d6..08f31a592 100644
--- a/docs/en/howto/extend-cms-interface.md
+++ b/docs/en/howto/extend-cms-interface.md
@@ -67,7 +67,7 @@ Load the new CSS file into the CMS, by setting the `LeftAndMain.extra_requiremen
 	:::yml
 	LeftAndMain:
 	  extra_requirements_css:
-	    mysite/css/BookmarkedPages.css:
+	    - mysite/css/BookmarkedPages.css:
 
 ## Create a "bookmark" flag on pages ##
 
diff --git a/docs/en/reference/preview.md b/docs/en/reference/preview.md
index fde31481d..8245d7f7a 100644
--- a/docs/en/reference/preview.md
+++ b/docs/en/reference/preview.md
@@ -69,7 +69,7 @@ to the `LeftAndMain.extra_requirements_javascript` [configuration value](/topics
 	:::yml
 	LeftAndMain
 	  extra_requirements_javascript:
-	    mysite/javascript/MyLeftAndMain.Preview.js:
+	    - mysite/javascript/MyLeftAndMain.Preview.js:
 
 In order to find out which configuration values are available, the source code
 is your best reference at the moment - have a look in `framework/admin/javascript/LeftAndMain.Preview.js`.
diff --git a/tests/assets/LeftAndMainTest.css b/tests/assets/LeftAndMainTest.css
new file mode 100644
index 000000000..e69de29bb
diff --git a/tests/assets/LeftAndMainTest.js b/tests/assets/LeftAndMainTest.js
new file mode 100644
index 000000000..e69de29bb