diff --git a/dev/BehatFixtureFactory.php b/dev/BehatFixtureFactory.php
index ab645fe46..f8c98e079 100644
--- a/dev/BehatFixtureFactory.php
+++ b/dev/BehatFixtureFactory.php
@@ -15,7 +15,7 @@ class BehatFixtureFactory extends \FixtureFactory {
 					$data[$fieldName] = $identifier;
 					break;
 				}
-			}   
+			}	
 		}
 
 		return parent::createObject($name, $identifier, $data);
diff --git a/model/Hierarchy.php b/model/Hierarchy.php
index 4228c0a3f..4f5b80b8b 100644
--- a/model/Hierarchy.php
+++ b/model/Hierarchy.php
@@ -15,7 +15,7 @@ class Hierarchy extends DataExtension {
 	 * @var Int
 	 */
 	protected $_cache_numChildren;
-
+	
 	/**
 	 * @config
 	 * @var integer The lower bounds for the amount of nodes to mark. If set, the logic will expand
@@ -115,7 +115,7 @@ class Hierarchy extends DataExtension {
 		if($limitToMarked && $rootCall) {
 			$this->markingFinished($numChildrenMethod);
 		}
-
+		
 		if($nodeCountCallback) {
 			$nodeCountWarning = $nodeCountCallback($this->owner, $this->owner->$numChildrenMethod());	
 			if($nodeCountWarning) return $nodeCountWarning;
@@ -158,7 +158,7 @@ class Hierarchy extends DataExtension {
 						} else {
 							$output .= $child->getChildrenAsUL("", $titleEval, $extraArg, $limitToMarked,
 								$childrenMethod,	$numChildrenMethod, false, $nodeCountThreshold);
-						}
+					} 
 					} elseif($child->isTreeOpened()) {
 						// Since we're not loading children, don't mark it as open either
 						$child->markClosed();
@@ -457,7 +457,7 @@ class Hierarchy extends DataExtension {
 		$id = $this->owner->ID;
 		return isset(self::$treeOpened[$baseClass][$id]) ? self::$treeOpened[$baseClass][$id] : false;
 	}
-	
+
 	/**
 	 * Get a list of this DataObject's and all it's descendants IDs.
 	 * @return int
@@ -497,7 +497,7 @@ class Hierarchy extends DataExtension {
 			$this->_cache_children = $result->filterByCallback(function($item) {	
 				return $item->canView();
 			});
-		} 
+					} 
 		return $this->_cache_children;
 	}
 
@@ -616,7 +616,7 @@ class Hierarchy extends DataExtension {
 			->exclude('ID', (int)$this->owner->ID);
 		if (!$showAll && $this->owner->db('ShowInMenus')) {
 			$staged = $staged->filter('ShowInMenus', 1);
-		}	
+		}
 		$this->owner->extend("augmentStageChildren", $staged, $showAll);
 		return $staged;
 	}
@@ -642,7 +642,7 @@ class Hierarchy extends DataExtension {
 				'Versioned.mode' => $onlyDeletedFromStage ? 'stage_unique' : 'stage',
 				'Versioned.stage' => 'Live'
 			));
-
+		
 		if(!$showAll) $children = $children->filter('ShowInMenus', 1);
 
 		return $children;
diff --git a/tests/behat/features/bootstrap/FeatureContext.php b/tests/behat/features/bootstrap/FeatureContext.php
index 557fcb8f1..bf8568fa3 100644
--- a/tests/behat/features/bootstrap/FeatureContext.php
+++ b/tests/behat/features/bootstrap/FeatureContext.php
@@ -31,7 +31,7 @@ class FeatureContext extends SilverStripeContext
 	 * Initializes context.
 	 * Every scenario gets it's own context object.
 	 *
-	 * @param	 array	 $parameters	context parameters (set them up through behat.yml)
+	 * @param array $parameters context parameters (set them up through behat.yml)
 	 */
 	public function __construct(array $parameters)
 	{
diff --git a/tests/behat/features/bootstrap/SilverStripe/Framework/Test/Behaviour/CmsUiContext.php b/tests/behat/features/bootstrap/SilverStripe/Framework/Test/Behaviour/CmsUiContext.php
index 6c528cf9d..bbc50048a 100644
--- a/tests/behat/features/bootstrap/SilverStripe/Framework/Test/Behaviour/CmsUiContext.php
+++ b/tests/behat/features/bootstrap/SilverStripe/Framework/Test/Behaviour/CmsUiContext.php
@@ -246,10 +246,13 @@ class CmsUiContext extends BehatContext
 	public function thePreviewContains($content)
 	{
 		$driver = $this->getSession()->getDriver();
-		$driver->switchToIFrame('cms-preview-iframe');
+		// TODO Remove once we have native support in Mink and php-webdriver,
+		// see https://groups.google.com/forum/#!topic/behat/QNhOuGHKEWI
+		$origWindowName = $driver->getWebDriverSession()->window_handle();
 
+		$driver->switchToIFrame('cms-preview-iframe');
 		$this->getMainContext()->assertPageContainsText($content);
-		$driver->switchToWindow();
+		$driver->switchToWindow($origWindowName);
 	}
 
 	/**
@@ -304,10 +307,13 @@ class CmsUiContext extends BehatContext
 	public function thePreviewDoesNotContain($content)
 	{
 		$driver = $this->getSession()->getDriver();
+		// TODO Remove once we have native support in Mink and php-webdriver,
+		// see https://groups.google.com/forum/#!topic/behat/QNhOuGHKEWI
+		$origWindowName = $driver->getWebDriverSession()->window_handle();
+		
 		$driver->switchToIFrame('cms-preview-iframe');
-
 		$this->getMainContext()->assertPageNotContainsText($content);
-		$driver->switchToWindow();
+		$driver->switchToWindow($origWindowName);
 	}
 
 	/**
diff --git a/tests/core/CoreTest.php b/tests/core/CoreTest.php
index 05e4312b1..28933b165 100644
--- a/tests/core/CoreTest.php
+++ b/tests/core/CoreTest.php
@@ -24,17 +24,17 @@ class CoreTest extends SapphireTest {
 			$user = getTempFolderUsername();
 
 			// A typical Windows location for where sites are stored on IIS
-			$this->assertEquals(sys_get_temp_dir() .
+			$this->assertEquals(sys_get_temp_dir() . 
 				'/silverstripe-cacheC--inetpub-wwwroot-silverstripe-test-project/' . $user,
 				getTempFolder('C:\\inetpub\\wwwroot\\silverstripe-test-project'));
 
 			// A typical Mac OS X location for where sites are stored
-			$this->assertEquals(sys_get_temp_dir() .
+			$this->assertEquals(sys_get_temp_dir() . 
 				'/silverstripe-cache-Users-joebloggs-Sites-silverstripe-test-project/' . $user,
 				getTempFolder('/Users/joebloggs/Sites/silverstripe-test-project'));
 
 			// A typical Linux location for where sites are stored
-			$this->assertEquals(sys_get_temp_dir() .'/silverstripe-cache-var-www-silverstripe-test-project/' . $user,
+			$this->assertEquals(sys_get_temp_dir() . '/silverstripe-cache-var-www-silverstripe-test-project/' . $user,
 				getTempFolder('/var/www/silverstripe-test-project'));
 		}
 	}